JAMB UTME - Computer Studies - 2024

Which database organization uses parent-child relationships to organize data in a tree-like structure?

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The type of database organization that uses parent-child relationships to organize data in a tree-like structure is the Hierarchical Database Model.

In a Hierarchical Database Model, data is structured in a way that resembles a tree. Each node in this "tree" represents a record, and these nodes have a parent-child relationship. The root node is the top-most part of this structure, and each node can have zero or more child nodes. It functions similarly to a family tree where a parent can have multiple children, but each child has only one parent.

This approach makes retrieval of data in a structured and predictable manner very efficient, as navigating through the tree is straightforward. However, it also means there can be limitations, such as issues with representing complex many-to-many relationships, which can be more easily accommodated in other database models like relational databases.

Which of the following is a cloud storage service?

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Cloud storage services are platforms that allow users to store, access, and manage their data, such as files and folders, over the internet without relying on their local storage devices. These services offer users the flexibility to access their data from anywhere using any device connected to the internet.

Among the options provided, Drop Box is a cloud storage service. It is designed specifically to store digital files such as documents, photos, and videos in the cloud. Users can upload their files to the service and access them remotely, share them with others, or synchronize them across multiple devices.

Let's briefly consider the other options:

• Yandex is a Russian multinational corporation specializing in Internet-related products and services, such as online search, maps, and advertising. While Yandex provides various services, it is primarily known for its search engine and not exclusively a cloud storage service.
• DuckDuckGo is a search engine focused on user privacy, offering internet searches without tracking users' personal information. It is not a cloud storage service.
• Adobe XD is a design and prototyping tool used for creating user interfaces for web and mobile applications. It is a tool for designing rather than storing files in the cloud.

What distinguishes open-source software from proprietary software?

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When we talk about the differences between **open-source software** and **proprietary software**, there are a few key points to understand:

1. Cost:
- **Open-source software** is usually available for **free**. This means you can download, use, and share it without paying any money.
- **Proprietary software**, on the other hand, often requires a **purchase** or a subscription fee. You have to pay to use or access its features.

2. Security:
- There is a common perception that **open-source software** can be **more secure**. This is because anyone can review the code for bugs and vulnerabilities, which can be fixed quickly by the community.
- With **proprietary software**, the source code is typically kept secret, limiting who can examine the code and fix issues. Security updates are dependent on the company providing the software.

3. Freedom to Modify:
- **Open-source software** is very flexible because it allows users to **modify and redistribute** the software. This means that anyone with programming skills can change the software to suit their needs and share those modifications with others.
- **Proprietary software** does not generally allow users to modify or distribute the software. It comes with restrictions that limit how you can use and share it.

In summary, **open-source software** offers **freedom, flexibility, and cost advantages** but comes with the need for technical expertise to ensure security. Meanwhile, **proprietary software** provides **structure and convenience** with potential costs and usage restrictions.

What does the '%' operator represent in programming languages?

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In programming languages, the '%' operator commonly represents the modulus operation. This operation finds the remainder after dividing one number by another. For example, in the expression 7 % 3, the result would be 1, because when 7 is divided by 3, it goes twice (which sums to 6) with a remainder of 1.

The modulus operator is often used in scenarios where you need to determine if a number is divisible by another, or when you are trying to loop back to the beginning of a list or array after reaching the end. It is important to distinguish it from other operations like assignment, concatenation, and exponentiation, each of which serves entirely different functions in programming.

What is the term for an email scam that tries to trick people into giving out personal information?

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The term for an email scam that tries to trick people into giving out personal information is Phishing.

Let's break it down:

Phishing is a type of scam where cybercriminals pretend to be a trustworthy source, like a bank or a well-known company, usually by sending an email. In this email, they create a sense of urgency or importance, encouraging the recipient to click a link or open an attachment.

Once the recipient does that, they may be directed to a fake website that looks real. The victim is then tricked into entering personal information like passwords, credit card numbers, or other confidential details. The scammers then use this information for unauthorized transactions or identity theft.

Phishing is like bait used by scammers to 'fish' for personal information from unsuspecting individuals. This is why it's important to never click on links or download attachments from suspicious emails and to verify the source before providing personal information.

What is a flowchart?

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A flowchart is a visual representation of an algorithm, using geometric shapes and symbols to depict the flow of logic. It serves as a diagrammatic guide to illustrate how a process works, enabling users to easily understand steps and decision points in solving a problem. By representing tasks as shapes and connecting them with arrows, flowcharts help in clarifying complex processes.

Which application package is used for developing websites?

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When developing websites, a specialized application package is essential to design, code, and manage web content efficiently. Let’s explore your options:

• Microsoft PowerPoint: This application is primarily used for creating presentations. It is not designed for website development, as it lacks necessary web development tools like HTML, CSS editing, or server-side scripting support.

• Microsoft Excel: Excel is a spreadsheet application. It is ideal for data analysis, mathematical calculations, and creating charts. Like PowerPoint, it doesn't offer website creation functionalities.

• Figma: Figma is a web-based application for interface design and prototyping. While it's excellent for designing UI/UX layouts, it doesn't provide the full coding and deployment capabilities required for complete website development.

• Adobe Dreamweaver: This is an integrated development environment (IDE) specifically designed for web development. Dreamweaver offers coding capabilities for HTML, CSS, JavaScript, and server-side scripting languages. It also provides a visual interface to design websites, support for responsive design, and integration with other Adobe tools. Therefore, Adobe Dreamweaver is the most suitable application for developing websites from the options provided.

What is the term for the unauthorized modification of data within a database by exploiting vulnerabilities in an application's software?

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The term for the unauthorized modification of data within a database by exploiting vulnerabilities in an application's software is known as a SQL injection.

Here's a simple explanation:

SQL (Structured Query Language) is the language used to manage and manipulate data in a database. An application often allows users to input data, such as a search query, that gets transformed into SQL commands to interact with the database.

An application vulnerability can occur when it doesn't properly validate or clean user inputs. In a SQL injection attack, the attacker inputs malicious SQL code to trick the application into executing harmful queries. These queries can include commands that modify, delete, or steal data in the database without authorization.

In summary, SQL injection is a serious security flaw that can lead to unauthorized access and modification of a database's data, often due to poor input validation in an application's software.

Which of the following best describes software?

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Software can be described as logical sequences of coded instructions that tell a computer how to perform specific tasks. This means that software is essentially the programs and applications that you use on your computer or other digital devices. These programs are created by writing codes that give the computer a set of instructions to execute tasks, such as browsing the internet, playing video games, or typing documents.

In simple terms, software is important because without it, your computer wouldn't be able to perform any functions. It’s the brain behind all your digital tasks, making it possible to communicate with the hardware and execute the activities you want your device to do. Therefore, it’s an essential aspect of modern-day technology, allowing us to interact with computers and gadgets in meaningful ways.

What type of ICT is used for immersive gaming solutions?

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In the realm of immersive gaming solutions, certain types of Information and Communication Technology (ICT) are crucial for enhancing user experience. Let me explain these technologies:

Virtual Reality (VR) Headset: This is a primary ICT used for immersive gaming. It is a wearable device that covers the user's eyes and sometimes ears, transporting them into a computer-generated environment. The VR headset provides 360-degree visuals, which means players can look around in all directions as if they are inside the game itself, creating an entirely immersive experience. The immersive nature of VR is achieved through advanced graphics, motion tracking, and sometimes, tactile feedback.

Augmented Reality (AR) Visor: This is another form of ICT used in gaming, though not as immersive as VR. AR overlays digital information on the real world. Players see and interact with digital elements in their actual environment through the visor. This technology enhances gaming by combining reality and fantasy, but it does not isolate the user from the real world like VR does.

360 Degree Panoramic Viewer: Although it offers a 360-degree view, this device is not as interactive or immersive as VR headsets for gaming. It allows users to view environments from all angles but often lacks the real-time interaction and depth that VR provides. This technology is more commonly used for viewing content rather than interactive gaming.

Portable Entertainment Device (PED): While PEDs are popular for gaming due to their portability and convenience, they do not provide the immersive experience VR headsets offer. These devices are typically handheld and rely on a flat screen, providing a standard gaming experience rather than an immersive one.

In conclusion, for immersive gaming solutions, the VR Headset is the most appropriate technology due to its ability to create a fully immersive virtual environment, allowing players to feel as though they are truly a part of the game.

Which characteristic of a computer refers to its ability to minimize energy, consumption and resource usage?

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The characteristic of a computer that refers to its ability to minimize energy consumption and resource usage is its Efficiency.

Efficiency means using the least amount of resources to get the job done. In terms of computers, this means using less electricity, making less heat, and not wasting processor or storage capability. An efficient computer can perform the same tasks as another computer while consuming less power and using fewer resources.

For instance, an efficient computer can run processes quickly without requiring a lot of energy or causing much wear and tear on its components. As a result, it not only helps in reducing electricity bills but also contributes to environmental conservation by reducing the carbon footprint.

What is the main purpose of device drivers?

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Device drivers are specialized system software that allows the operating system to communicate with hardware devices.

What is a common security threat that can compromise your computer files?

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A common security threat that can compromise your computer files is the use of weak passwords for user accounts and file access.

When you use passwords that are easy to guess, like "123456" or "password," it becomes much easier for unauthorized people to gain access to your computer and files. Weak passwords are like weak locks on a door; they do not provide enough protection against someone trying to break in.

To keep your computer files safe, it is important to use strong passwords. A strong password typically includes a mix of uppercase and lowercase letters, numbers, and special characters. This makes it much harder for someone to guess or crack your password, providing an added layer of security to your computer files.

In contrast, incompatibility with different operating systems, outdated software versions, and physical damage to your hardware do not directly relate to unauthorized access to your files. These factors may cause inconveniences or require software updates or repairs, but they don't specifically involve compromising your file security like weak passwords do.

What is the main advantage of using hexadecimal over binary?

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When it comes to choosing hexadecimal over binary for various applications, the **main advantage** is that **hexadecimal numbers are easier to read and write**.

Let's delve into why this is true using simple examples:

• **Binary representation** uses only two symbols, 0 and 1. For example, the binary number "1111" represents the decimal number 15. If we have a larger number like "101011110", it can be cumbersome and error-prone to read or write.
• In contrast, **hexadecimal representation** uses 16 symbols (0-9 and A-F), which allows it to express the same value using fewer digits. The number "101011110" in binary is represented as "15E" in hexadecimal. This abbreviation makes **hexadecimal more convenient and less error-prone** in human communication.

Thus, the fundamental advantage here is that **hexadecimal provides a more compact and human-friendly way to represent binary values** compared to the other considerations listed. By reducing the length of numbers and improving legibility, it becomes much easier for programmers and engineers to read, understand, and communicate the digital values effectively.

What is the function of the motherboard in a computer system?

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The motherboard in a computer system is a crucial component that acts as the main circuit board. Its primary function is to connect all the hardware components of the computer. This includes the central processing unit (CPU), memory (RAM), storage devices, graphics card, and other peripheral devices. Think of it as a central hub that allows all the parts of the computer to communicate with each other and work together effectively.

Unlike other functions such as storing data or performing calculations, which are typically handled by specific components like the hard drive or the CPU respectively, the motherboard does not store data or perform calculations itself. Instead, it ensures that these components can access power and communicate with one another.

While the motherboard can assist in providing internet access by holding network cards or wireless adapters, its primary responsibility remains the connection and coordination of the computer's components. Without a motherboard, these components wouldn’t be able to interact, making it an indispensable part of any computer system.

Which type of attack floods a network or server with excessive traffic to make it unavailable to legitimate users?

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The type of attack that **floods a network or server with excessive traffic to make it unavailable to legitimate users** is called a Denial-of-Service (DoS) attack.

In a Denial-of-Service attack, the attacker sends a huge amount of data or requests to the target, which can be a server, network, or any service, overwhelming its resources such as bandwidth, memory, or processing power. Because of this excessive traffic, the system becomes overloaded and cannot handle legitimate requests effectively, resulting in disruption or complete unavailability of the service for genuine users.

Think of it like a busy road where too many cars suddenly try to pass through a single lane all at once; legitimate travelers (users) can't move smoothly because of the excessive congestion (traffic) intentionally caused by the attacker.

Why is it important to be stable, steady, and patient during program development?

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Being stable, steady, and patient helps in reducing errors and ensuring the quality of the program.

Which type of software acts as an intermediary between hardware and applications?

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The type of software that acts as an intermediary between hardware and applications is System Software.

Here's why:

• System Software includes the operating system (such as Windows, macOS, Linux) and is responsible for managing and controlling the hardware components of a computer. It provides an environment in which application software can function. This means it acts as a bridge, allowing software applications to interact effectively with hardware components like the CPU, memory, and storage devices.
• When you run an application on your computer, the system software converts the instructions from the application into a form that the computer hardware can understand and execute. Without system software, it would be extremely difficult for application software to perform tasks, as they would need to directly interact with the different hardware components, which can be complex.
• In summary, system software essentially facilitates the coordination and efficiency of both hardware and application software by acting as an intermediary.

Which toolbar in word processing packages provides options for adjusting paragraph alignment, indentation,and spacing.

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In word processing packages, the toolbar that typically provides options for adjusting paragraph alignment, indentation, and spacing is the Formatting Toolbar.

Here is why the Formatting Toolbar is relevant for these tasks:

• Paragraph Alignment: The Formatting Toolbar includes icons and options that allow users to align text to the left, center, right, or justify it so that text is evenly distributed between the margins.
• Indentation: This toolbar also typically provides options to increase or decrease indentation, which shifts the position of the paragraph inward or outward from the margins.
• Spacing: Users can adjust line spacing within paragraphs and spacing between paragraphs using options typically found on the Formatting Toolbar.

By utilizing the Formatting Toolbar, users can enhance the readability and aesthetic organization of their document, ensuring that the text is properly aligned, indented, and spaced according to their preferences or document requirements.

What is the purpose of the design phase in program development?

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The design phase in program development is crucial because it involves creating a clear blueprint for how the program will work. It helps organize ideas and structure before actually building the software. The main purpose of the design phase includes several key activities:

• Creating a Flow Chart and Algorithm: During the design phase, developers focus on outlining the steps and logic needed to solve the problem at hand. This involves creating algorithms, which are step-by-step problem-solving processes, and flow charts, which visually represent the flow of the program.
• Clarifying Requirements: A detailed design ensures that developers clearly understand what the program is supposed to do. It translates complex requirements into clear instructions that guide the program's construction.
• Planning the Structure: The design phase involves planning the architecture of the program, including how different components will interact. It defines the modules or sections of the program and how they are connected.
• Facilitating Communication: A well-documented design serves as a communication tool among team members, allowing everyone involved in the project to have a uniform understanding of how the program should function.
• Reducing Errors: By thoroughly planning the design before moving on to coding, developers can identify potential issues early, thus minimizing errors and saving time during later stages of development.

Overall, the design phase acts as a vital planning stage that ensures that the actual coding process is more organized and efficient. It sets the foundation for building a robust and effective program.

What is the benefit of using a bulleted or numbered list in your document?

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Using a bulleted or numbered list in your document offers several benefits that enhance the overall presentation and understanding of the content:

Readability Improvement: Lists help in breaking down complex information into manageable chunks, making it easier for readers to process and understand the content quickly.

Highlighting Important Points: A list format draws attention to key points or main ideas, ensuring that they stand out in the document. This is particularly useful when you want to emphasize specific information.

Visual Separation: Lists provide a clear and organized way to separate items visually, making the document look less cluttered and more aesthetically pleasing.

Consistent Formatting: Bulleted and numbered lists ensure consistency in how items are presented, which can make your document look more professional and organized.

Overall, the use of lists enhances the clarity and effectiveness of your communication by organizing the information in a user-friendly format.

Which key on a keyboard is used to access special functions like volume control or brightness?

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The key on a keyboard that is used to access special functions like volume control or brightness is the Function key. This can often be seen as the "Fn" key on many keyboards.

Here's how it works:

• The Function key is usually located at the bottom row of the keyboard, often between the "Ctrl" and "Windows" keys.
• When you hold down the Function key and press one of the keys in the top row, which are typically labeled F1 to F12, you can access special functions.
• These functions vary depending on the device and manufacturer but often include controlling the brightness, adjusting the volume, toggling Wi-Fi, and other multimedia or hardware controls.

Therefore, the Function key is essential for quickly accessing these special functionalities without needing to navigate through software menus.

What is the advantage of using cell references in formulas compared to entering constant values?

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Using cell references in formulas has several advantages compared to entering constant values. Here are some of the key benefits:

• Flexibility: When you use cell references, your formulas can adapt to changes in the data. If you update the values in the referenced cells, the results of the formula will automatically update as well. This is especially useful when working with large datasets where values might change frequently.


• Efficiency: Using cell references reduces the need for repeated manual data entry. You can reference a cell once in a formula and then easily copy that formula to other cells, minimizing the chance of errors that come with manual data entry.


• Accuracy: By reducing manual entry, you also minimize the risk of errors made while entering constants. This makes your calculations more reliable and accurate.


• Consistency: Cell references ensure that formulas are consistent across a worksheet or even across multiple worksheets. If you use the same cell references in the same way, you maintain consistency throughout your calculations.


• Clarity: Although formulas with cell references might seem complex at first, they often become easier to understand. You can clearly see the relationship between the data and the calculations, making it easier to track and debug errors if necessary.

What does SSD stand for, and what is its primary advantage?

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SSD stands for Solid State Drive. Its primary advantage is that it offers faster speed compared to traditional hard drives.

Here is a simple breakdown of why SSDs are faster:

• Technology: SSDs use flash memory to store data, which allows for quicker data retrieval because there are no moving parts involved.
• Speed: As a result, SSDs can read and write data much faster than traditional hard disk drives (HDDs) which rely on spinning disks and a moving read/write head.
• Performance: This faster speed translates into quicker boot times, faster file transfers, and generally more efficient system performance.

Therefore, the key advantage of SSDs is their ability to make computers and other devices work much faster and more efficiently.

Which access method is least efficient for data retrieval?

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When considering different data retrieval methods, sequential access is the least efficient for data retrieval. Here's why:

Sequential access means that data is accessed in a specific order, one piece after another. Think of it like reading through an entire book to find a particular chapter; you start with the first page and go through each page sequentially until you reach the chapter you need. This can be quite inefficient if the data you're looking for is located far from the starting point or near the end.

In contrast, other methods like direct access or random access allow you to jump directly to the specific piece of data you need, much like flipping to a specific page in a book without having to read all the pages that come before it.

Therefore, because sequential access requires reading through potentially unnecessary data to get to the desired piece, it is considered the least efficient method for data retrieval. This can become especially time-consuming with large datasets.

What is a potential drawback of using high-level programming languages?

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High-level programming languages are designed to be closer to human languages and further from machine languages, which makes them easier to write and understand. However, one **potential drawback** of using high-level programming languages is that they can sometimes have **slower execution speeds**. This is because high-level languages introduce an **abstraction layer** between the programmer and the machine. This abstraction involves translating high-level commands into machine code that the computer can understand and execute. This translation process can take time, leading to slower execution speeds compared to low-level languages, which are closer to machine code and thus executed more directly. In summary, while high-level languages are user-friendly, they might sacrifice some performance in terms of speed.

What is the primary purpose of using a query in MS Access?

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Queries are a powerful tool in MS Access for retrieving specific data from your tables. You can define criteria to filter the data based on specific conditions, allowing you to focus on relevant information for analysis or reporting.
 

What type of printer uses toner to print documents?

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A LaserJet printer uses toner to print documents.

Here's how it works in a simple and understandable way:

• LaserJet printers use a special powder called toner instead of liquid ink. This toner is stored in a toner cartridge.
• When you send a document to print, the printer uses a laser beam to create an image of the document on a rotating drum inside the printer.
• The laser forms the image by making certain parts of the drum electrically charged.
• As the drum rolls through the toner, the electrically charged areas on the drum pick up the toner particles.
• The drum then transfers these toner particles onto a sheet of paper in the form of text or images.
• Finally, a set of heated rollers, known as the fuser, melts and presses the toner onto the paper so that it sticks, resulting in a permanent printout.

LaserJet printers are known for their speed and efficiency, especially when printing large volumes of documents. They are commonly used in offices and places where high-quality and fast printing are required.

What are some key components of an ICT system?

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An ICT (Information and Communication Technology) system is critical in today's digital world as it facilitates communication, data processing, and many other essential tasks. The key components of an ICT system can be broadly categorized into hardware, software, and networks.

Hardware refers to the physical components of an ICT system. This includes devices such as computers, smartphones, tablets, servers, and other equipment necessary for input, processing, output, and storage of data. Hardware serves as the backbone and provides the necessary infrastructure for an ICT system to function.

Software encompasses the programs and applications that execute specific tasks on hardware devices. Examples include operating systems like Windows or macOS, word processors, web browsers, and database management systems. Software enables users to perform tasks efficiently and allows the hardware to operate flexibly and effectively.

Networks are the interconnecting links that allow communication between various components in an ICT system. This includes the internet, intranets, and communication protocols that enable data exchange between devices and systems. Networks are crucial as they facilitate the sharing of resources, information, and services, making it possible for ICT systems to connect locally and globally.

In summary, an ICT system's effectiveness relies heavily on the seamless integration and functioning of its hardware, software, and networks, all of which work in tandem to enable efficient information processing and communication.

What is the advantage of using cell references in formulas compared to entering constant values?

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Using **cell references** in formulas offers several advantages compared to entering constant values:

1. Improved Accuracy: By using cell references, you minimize the risk of manual entry errors. When you reference a cell, you are using data that already exists in the sheet, which helps in maintaining accuracy.

2. Enhanced Flexibility and Adaptability: Cell references make your formulas more *flexible* and *adaptive* to changes. If the data in a referenced cell changes, the formula result will automatically update. This means you do not need to adjust the formula each time the data changes, which is a significant advantage over using constant values.

3. Simplified Maintenance: When you use cell references, maintaining your worksheet becomes easier. Instead of updating each formula for every change, you only need to update the data in the cells that are referenced. This simplification makes managing large spreadsheets much more efficient.

Understanding Complexity: While formulas that use cell references can appear more complex at first glance, they actually *simplify* the logic because they make it clearer how the formula’s result depends on other data. This connection is less obvious when constant values are hidden inside the formula.

In conclusion, **cell references** enhance the dynamics and efficiency of working with spreadsheets by ensuring accuracy and making formulas adaptable, which is beneficial not only for complex formulas but for simple calculations as well.

Which of the following is NOT a characteristic of interpreters?

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Interpreters translate code line by line, not all at once.

How can you add speaker notes to a PowerPoint slide?


You can add speaker notes by clicking on "View" and then selecting "Notes Page" to open the notes pane where you can
e your notes.

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To add speaker notes to a PowerPoint slide, follow these steps:

1. Open your PowerPoint presentation.
2. Go to the menu and select "View". This will provide you with different viewing options for your slides.
3. Choose "Notes Page" from the available options. This will open the notes pane where you can add notes.
4. Locate the pane at the bottom of the slide. This is where you can enter your speaker notes.
5. Click inside this pane and start typing the notes you would like to associate with the current slide.

Your notes will be saved and can be viewed in the Notes Page view or printed out as notes when delivering your presentation. These notes are useful for helping you remember important points during your presentation or providing additional information not shared directly with the audience.

Which type of computer would a small business most likely use for everyday tasks?

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For everyday tasks, a small business would most likely use microcomputers, which are commonly known as personal computers or PCs. Let me explain why this is the most suitable choice:

• Microcomputers: These are designed for individual use and are versatile, cost-effective, and user-friendly. They are ideal for performing a wide range of everyday business tasks, such as word processing, managing spreadsheets, browsing the internet, and running small business software. PCs and laptops fall into this category, making them accessible and easy to maintain for a small business.


• Minicomputers: Although these were once popular due to their smaller size compared to mainframes, they are now largely obsolete and replaced by microcomputers. They are more powerful than microcomputers, but their higher cost and complexity make them unnecessary for everyday tasks within a small business.


• Mainframe computers: These are extremely powerful machines designed to handle and process very large amounts of data simultaneously. They are typically used by large organizations for bulk data processing and are very costly and complex to operate, far beyond the needs of a small business's daily activities.


• Supercomputers: Supercomputers are the most powerful of all, used for complex calculations, simulations, and data-heavy tasks such as climate research, quantum physics, and molecular modeling. They are neither affordable nor necessary for simple day-to-day operations of a small business.

In summary, the microcomputer is the most appropriate tool for a small business due to its affordability, ease of use, and ability to efficiently handle daily tasks necessary for running a business.

What was the primary advancement of the EDVAC over the ENIAC?

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The primary advancement of the EDVAC over the ENIAC was its Stored-Program architecture.

Here's a simple and clear explanation:

ENIAC, which stands for Electronic Numerical Integrator and Computer, was one of the earliest electronic general-purpose computers. However, one significant limitation of the ENIAC was that its program instructions had to be input manually using switches and plugboards. This made programming very tedious and inflexible.

EDVAC, or the Electronic Discrete Variable Automatic Computer, introduced the concept of the Stored-Program architecture. In this system, both program instructions and data could be stored in the computer's memory. This allowed the computer to be much more flexible because it could change programs and operations without needing to manually rewire it. The Stored-Program concept is instrumental to modern computing, making it the most noteworthy advancement of the EDVAC over its predecessor, the ENIAC.

Which operation combines multiple files into a single archive file?

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The operation that combines multiple files into a single archive file is called Compress.

To explain, when we talk about "compressing" files, we mean the process of taking multiple individual files and bundling them together into one single file, often with the added benefit of reducing the overall file size. This makes it easier to store, send, or share a collection of files without having to handle each file separately.

The term "archive" refers to the fact that all the files are collected together, preserving the original files while making them more convenient to access. Formats like ZIP or RAR are commonly used for this purpose.

In summary, by using the "compress" operation, you can create a single archive file that contains numerous individual files, making it easier to manage them collectively.

What are some common criteria used to classify computer files?

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Common criteria for classifying files include:
*File type (document, image, audio, video, etc.)
*Content (project name, subject matter, date, etc.)
*Project or task association
*User (personal, work, client-specific)

Which stage of the SDLC involves evaluating the system to ensure it meets user needs and making necessary adjustments?

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The stage of the Software Development Life Cycle (SDLC) that involves evaluating the system to ensure it meets user needs and making necessary adjustments is the Review stage. During this phase, the developed system is examined thoroughly to ensure that it aligns with the initial requirements and user expectations.

If there are discrepancies between what was built and what the users need, this is the time to identify them. It might involve getting feedback from the users, conducting tests, and making necessary adjustments to the system to improve functionality and performance. The aim is to ensure that the system functions as intended and provides a satisfactory experience for the end-users.

What does the term "formula" refer to in a spreadsheet?

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In a spreadsheet, the term "formula" refers to a set of instructions used to perform calculations within cells. A formula can include numbers, cell references, operators such as addition (+), subtraction (-), multiplication (*), and division (/), as well as functions like SUM or AVERAGE. It helps in performing tasks such as adding, subtracting, multiplying, or dividing values in a spreadsheet automatically.

What is the key innovation of the Analytical Engine?

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The Analytical Engine was a groundbreaking mechanical computer designed by Charles Babbage in the 1830s. One of its **key innovations** was that it introduced the concept of a **central processing unit (CPU)**, which was responsible for performing calculations. This was a significant advancement from previous calculating machines.

Another important innovation was that the Analytical Engine incorporated the idea of a **memory unit**. This was crucial because it allowed the machine to **store data and programs**, enabling it to perform a sequence of operations automatically without human intervention. This foresight is what distinguishes the Analytical Engine from simpler devices like calculators.

Additionally, it employed **punch cards** for inputting instructions and data. The use of punch cards made it possible for the machine to be programmed, another revolutionary concept at the time. This feature laid the groundwork for programming languages and modern computing.

While the Analytical Engine was designed to be operated using a **steam-powered mechanism for calculations**, which was innovative in terms of the power source at the time, the **introduction of the CPU concept** stands out as the primary technological innovation that paved the way for modern computers.

Microprocessors became widely used in which generation of computers?

Awọn alaye Idahun

The widespread use of microprocessors began during the Fourth Generation of computers. This generation started in the early 1970s and has continued to evolve into the present day. Let's understand this concept more clearly:

Microprocessors are essentially the brains of the computer. They incorporate the functions of a computer's central processing unit (CPU) on a microchip. This small chip contains millions of tiny components that work together to process data and perform calculations.

The significance of microprocessors lies in their ability to make computers smaller, more affordable, and more efficient. Before microprocessors, computers used to be quite large, expensive, and limited in capability. However, with the advent of microprocessors, computers became more accessible to individuals and businesses alike.

The Fourth Generation saw a massive shift from isolated computers that were largely used by institutions and large corporations to devices that could be used by anyone, including personal computers (PCs) that became available to the general public.

In summary, microprocessors revolutionized computing technology by enabling the development of compact, affordable, and powerful computers, marking a significant technological leap during the Fourth Generation of computers.