JAMB UTME - Computer Studies - 2022

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An Operating System (OS) is a type of system software. It is a program that manages the hardware and software resources of a computer, and provides a platform for other software applications to run on. The OS controls the input/output operations, manages memory and storage resources, and schedules tasks to be executed by the computer's processor. Examples of common operating systems include Windows, macOS, Linux, and Android.

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ios is not a programming language. HTML, Java, and C++ are all programming languages, while ios is an operating system created by Apple Inc. for its mobile devices, such as the iPhone and iPad. Programming languages are used to write computer programs, while operating systems provide a platform for those programs to run on.

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Microsoft PowerPoint is a presentation software application. This means that it is a program used to create visual aids or slideshows that are intended to enhance a live presentation. It allows users to create and design professional-looking slides that can contain text, images, videos, charts, and graphs. These slides can be used to convey information, ideas, or messages in a clear and visually appealing way. PowerPoint is often used in business, education, and other settings where presentations are a common means of communication. It is not a graphing or gaming software, nor is it considered a productivity software in the same sense as a word processor or spreadsheet program.

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The second generation of computers had expensive operation costs compared to other generations. The second generation of computers, which emerged in the late 1950s and early 1960s, were characterized by the use of transistors instead of vacuum tubes that were used in the first generation. While transistors were smaller, more reliable, and more energy-efficient than vacuum tubes, they were still relatively expensive to produce and required a significant amount of power to operate. In addition, the second generation of computers required air conditioning systems to keep them cool, which added to their overall operating costs. The high cost of production, maintenance, and operation made these computers expensive and limited their accessibility to only large organizations, such as government agencies, research institutions, and corporations, which had the resources to invest in them. In contrast, the third and fourth generations of computers, which emerged in the 1960s and 1970s, respectively, were characterized by the use of integrated circuits and microprocessors, which greatly reduced the cost of production and operation, making computers more accessible and affordable to individuals and small businesses.

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Java is a high-level programming language. This means that it is designed to be easy to read and write for humans, and provides a higher level of abstraction from the hardware than lower-level languages. High-level languages like Java typically have built-in libraries and features that allow developers to write code more efficiently and focus on solving problems rather than worrying about low-level details like memory management or machine architecture. Additionally, high-level languages are typically platform-independent, which means that Java code can be compiled and run on different operating systems without needing to be rewritten.

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The term "CU" can have different meanings depending on the context. Here are some possibilities: 1. Compound Unit: This term does not have a widely recognized meaning in the field of computing or technology in general. However, "compound" can refer to something that is made up of multiple parts, so in some cases, "CU" could be used to refer to a unit that is composed of several components. 2. Communication Unit: In some contexts, "CU" may refer to a Communication Unit. This could be a device or module that is responsible for handling communication between different components or systems, such as transmitting data between a computer and a peripheral device like a printer or scanner. 3. Computer Unit: "CU" could also refer to a Computer Unit, which may be a standalone computer or a component within a larger computer system. In this case, "CU" would generally refer to the main processing unit that is responsible for executing instructions and performing calculations. 4. Control Unit: In the context of computer architecture, "CU" most commonly stands for Control Unit. The Control Unit is a component within the CPU (Central Processing Unit) of a computer that is responsible for coordinating the flow of data between different parts of the CPU and executing instructions. The Control Unit is sometimes referred to as the "brain" of the CPU, as it is responsible for coordinating and directing the operations of the computer. So, to answer the question of what the full form of "CU" is, we would need to know the specific context in which the term is being used.

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Numerous files are referred to as "files". A file is a collection of data or information that is stored on a computer or other electronic device. Files can come in many different formats, such as documents, images, music, and videos. They are used to store information that can be easily accessed, edited, and shared. For example, a word processing document is a type of file that can be used to write and edit text, while an image file can be used to store and display photos. Files are often organized into folders, which are like virtual folders or directories that help you keep your files organized and easily accessible. You can create folders, move files between folders, and even rename or delete files and folders.

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A bit is the smallest unit of digital information in computing, and it can have two possible values: 0 or 1. This is because a bit is used to represent a binary digit, which can be either on or off, true or false, or high or low. So, the answer is 2. To give an example, imagine a light switch that can either be turned on or off. We can use a bit to represent the state of the switch, where 0 represents the switch being off, and 1 represents the switch being on. In this case, a single bit is enough to represent the two possible states of the switch. Similarly, in computing, a single bit is enough to represent two possible states of any digital information.

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A computer cannot boot if it does not have an operating system (OS). An operating system is the most basic software that runs on a computer and is responsible for managing and coordinating all the activities of the computer hardware and software. It is the first program that runs when the computer starts up, and it is responsible for initializing the hardware and loading other software, such as device drivers and applications. Without an operating system, the computer would not be able to perform any useful tasks, as it would not have the necessary software to control and manage its hardware components. Examples of popular operating systems include Microsoft Windows, macOS, and Linux.

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Microsoft Excel is primarily used to solve problems involving numbers. It is a spreadsheet program that allows you to organize, analyze and perform calculations on data. You can use Excel to create tables, charts and graphs to visually represent your data and make it easier to understand. It is commonly used for tasks such as budgeting, tracking expenses, and managing project timelines. The program also has many built-in functions that can help you perform complex calculations and analysis with ease. So, the main purpose of Microsoft Excel is to help you work with numbers and make sense of data.

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In COBOL, CO stands for "Common Business Oriented Language". COBOL is a programming language that was designed specifically for business applications, such as finance, accounting, and payroll. COBOL was first developed in the late 1950s, and it quickly became popular in the business world because it was easy to use and understand, and it could handle large amounts of data. The "common" part of the acronym refers to the fact that COBOL was intended to be a language that could be used by a wide range of businesses, regardless of their specific industry or application. The "business-oriented" part of the acronym emphasizes the language's focus on business data and processing.

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"Joy stick" is not a type of computer application. A computer application, also known as an application or app, is a program that runs on a computer and provides a specific set of functions for the user to perform. Examples of computer applications include Microsoft Word for word processing, Firefox for web browsing, and VLC media player for playing audio and video files. A joy stick, on the other hand, is a device used to control movement in computer games or simulations. It typically consists of a stick that can be moved in different directions to control the movement of an object on the screen. Joy sticks are not considered applications because they do not provide specific functions like a word processor or media player, but rather serve as input devices for other applications.

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System software has the major function of controlling and managing the computer system. It is a type of software that acts as an intermediary between the computer hardware and the user applications. System software is responsible for coordinating the activities and sharing of resources of the computer hardware, such as the central processing unit (CPU), memory, and storage. It also provides basic services for other software, such as file management, security, and memory management. Examples of system software include operating systems, device drivers, and utility programs. The primary goal of system software is to provide an environment for the smooth and efficient operation of the computer and its components.

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A firewall is a type of cybersecurity tool that helps protect a computer or network from unauthorized access or malicious activity from the internet. Think of a firewall as a security guard that stands at the entrance to your network, examining all incoming and outgoing traffic. It examines each packet of data to see if it meets certain criteria, such as the source and destination of the data, and the type of data being transmitted. If the packet meets the criteria, it's allowed to pass through the firewall and reach its destination. If it doesn't meet the criteria, the firewall blocks the packet, preventing it from entering your network. A firewall can help prevent attacks like hacking, malware infections, and other cyber threats that could compromise your data or network. Firewalls can also be configured to filter out certain types of traffic or limit access to certain resources, providing an additional layer of protection for your network. In summary, a firewall is a vital cybersecurity tool that acts as a barrier between your network and the internet, helping to keep your data and devices safe from cyber threats.

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The shortcut key to "undo" the last action on a Microsoft Word page is "Ctrl + Z". When you perform an action on a Word page, such as typing, deleting, formatting or copying text, you can undo that action by using the "Ctrl + Z" keyboard shortcut. This will revert the page to the state it was in before the action was performed. For example, if you accidentally delete a sentence, you can press "Ctrl + Z" to undo the deletion and restore the sentence. The "Ctrl + Z" shortcut is a very useful and commonly used feature in Microsoft Word as it allows you to quickly correct mistakes without having to manually undo each action. It can be used multiple times to undo several actions in a row. If you want to redo an action that was previously undone, you can use the "Ctrl + Y" keyboard shortcut. In summary, the "Ctrl + Z" keyboard shortcut is used to undo the last action performed on a Microsoft Word page, allowing you to easily correct mistakes and restore the previous state of the page.

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Firefox is an example of application software. Application software is any computer program designed to perform specific tasks or provide a specific functionality to the user. It is created to help the user with various tasks such as creating documents, browsing the internet, editing photos and videos, or playing games. Application software is generally designed to be easy to use and is intended for non-technical users. Firefox is a web browser that allows users to browse the internet, access web content, and perform various online tasks. It is a standalone software application that is installed on a computer or mobile device and is used to perform a specific function. Therefore, Firefox is an example of application software.

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A keyboard is usually made up of around 101 to 105 keys, depending on the type and model of the keyboard. The most common keyboard layout is called the QWERTY layout, which includes letters, numbers, and various symbols and functions. The number of keys can vary based on the size of the keyboard and additional features, such as multimedia buttons or a numeric keypad. Overall, the number of keys on a keyboard can range from a basic 101-key layout to a more advanced 105-key layout with additional buttons.

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The correct answer is "Identity Theft." Identity theft occurs when someone pretends to be another person by stealing their personal information, such as their name, social security number, or credit card information, in order to commit fraud or other illegal activities. The thief may use this information to open bank accounts, make purchases, or apply for loans in the victim's name, causing financial harm and damaging the victim's credit score. It can happen both in the physical world (e.g. someone stealing your mail or wallet) and online (e.g. someone hacking into your social media or email account). It is important to take steps to protect your personal information and monitor your financial accounts to prevent identity theft.

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"Cold" booting is done by turning on the computer at first instance. Booting is the process of starting a computer, and it can be done in two ways: cold booting and warm booting. A cold boot occurs when a computer is turned on after being completely shut down. This is the first time the computer is starting up and all components are starting from a completely powered-off state. This type of booting is often necessary when there are problems with the operating system or software and a restart does not resolve the issue. A warm boot, on the other hand, occurs when a computer is restarted without first being shut down. This type of booting is usually faster than a cold boot because some components remain powered on and do not need to be restarted from a completely powered-off state. The options "hot," "spicy," and "cool" are not relevant to booting a computer.

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In any software package, a new version number that increases the whole number before the decimal point represents a major improvement on the previous version. Therefore, the versions that represent a major improvement on the previous version is 2.0.

In software development, version numbers are used to identify different releases or iterations of a program. A new version number is typically assigned when significant changes or improvements are made to the software. The first number before the decimal point in a version number is known as the major version number. When this number increases, it indicates that there has been a significant change or improvement in the software that warrants a new release.

The second number after the decimal point is the minor version number, which typically represents smaller changes or bug fixes. Therefore, 2.0 is a major releases that represent significant improvements over the previous version, while 1.0, 1.5 and 2.5 are minor releases that represent smaller changes or bug fixes.

In summary, a new software version number that increases the major version number before the decimal point represents a major improvement on the previous version, indicating that significant changes or improvements have been made to the software.

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The illegal access to a network or computer system is called hacking. Hacking refers to unauthorized access to a computer system or network with the intention of compromising its security and potentially causing harm. This can include stealing sensitive information, installing malicious software, or disrupting the normal functioning of the system. Hacking is illegal and can result in serious consequences for the hacker, such as fines and imprisonment. It is important for individuals and organizations to take steps to secure their networks and systems to prevent unauthorized access.

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The test used to determine if a computer has the ability to think is called the Turing test. The Turing test was proposed by the mathematician and computer scientist Alan Turing as a way to determine if a machine can exhibit intelligent behavior equivalent to, or indistinguishable from, that of a human. The test involves a human evaluator who engages in a natural language conversation with a machine and a human, without knowing which is which, and tries to determine which is the machine based on their responses. If the evaluator is unable to reliably distinguish the machine from the human, the machine is said to have passed the Turing test and demonstrated human-like intelligence.

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The program that translates programs to a simpler language that the computer can execute is called a compiler. A compiler is a program that takes the source code of a program written in a high-level programming language and translates it into machine code or executable code that the computer can understand and execute. The process of compiling involves several steps, including lexical analysis, syntax analysis, semantic analysis, code optimization, and code generation. When a programmer writes a program in a high-level programming language such as Java or Python, the code is not directly executable by the computer. Instead, the code must be translated into machine code, which is a low-level language that the computer can understand and execute. This is where the compiler comes in. The compiler takes the source code written in the high-level programming language and converts it into machine code that can be executed by the computer. The advantage of using a compiler is that the resulting executable code is usually faster and more efficient than code interpreted by an interpreter, which we will discuss next. Additionally, since the code is already translated into machine code, it can be executed multiple times without the need for further translation, making it faster to execute. Overall, a compiler is a program that translates high-level programming code into machine code that a computer can execute, allowing programmers to write code in a more human-readable language and then have it translated into a language that the computer can understand and execute.

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The Java interpreter translates a Java program from its original form, which is a high-level programming language, into a special type of code called "bytecode." Bytecode is a low-level code that is specific to the Java Virtual Machine (JVM), which is a software layer that sits between the Java program and the computer's hardware. When a Java program is compiled, it is translated into bytecode rather than machine language. Bytecode is a form of binary code that is designed to be portable across different platforms, meaning that it can run on any computer that has a JVM installed, regardless of the specific hardware or operating system. So, to summarize, the Java interpreter translates a Java program from a high-level programming language into bytecode, which is a low-level binary code that is specific to the JVM. The bytecode can then be executed by the JVM on any computer that has it installed.

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An analog computer is a type of computer that processes continuously varying data. This means that it is designed to work with data that changes smoothly and continuously over time, rather than data that is discrete or intermittently changing. For example, an analog computer could be used to solve complex mathematical equations or simulate physical systems that involve continuous variables, such as temperature, pressure, or velocity. These types of systems can be difficult to model using digital computers, which work with discrete values that are represented by binary digits (bits). Analog computers use physical components, such as resistors, capacitors, and amplifiers, to process the input data. These components are connected in circuits that can perform mathematical operations, such as addition, multiplication, and integration. The output of an analog computer is also a continuous signal that can be measured and displayed using analog devices, such as oscilloscopes and chart recorders. Overall, analog computers are useful for solving problems that involve continuous data and require high-speed processing. However, they are less versatile than digital computers and can be more difficult to program and maintain.

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The key that deletes text is the backspace key. When you type, the characters you enter are added to the right of the cursor, which shows you where the next character will be inserted. If you want to delete a character, you can move the cursor to the left of that character using the arrow keys, and then press the backspace key. This will remove the character to the left of the cursor. You can also use the backspace key to delete a selection of text. To do this, you first need to highlight the text you want to delete by clicking and dragging the cursor over it. Once the text is highlighted, you can press the backspace key to delete it. In summary, the backspace key is used to delete characters to the left of the cursor or to delete a selected portion of text.

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Gray codes are less error-prone because they only change in one-bit position at a time. Hence, they are considered as the minimum error code.

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The first commuters were programmed using machine language. Machine language is the lowest-level programming language that can be used to write computer programs. It consists of binary code, which is a sequence of 1's and 0's that the computer can understand and execute directly. The first computers, such as the ENIAC, did not have high-level programming languages like we have today, such as Python or Java. Instead, they had to be programmed using machine language. This meant that the programmers had to manually enter long sequences of binary code to perform even the simplest tasks on the computer. As computers advanced, higher-level programming languages were developed to make programming easier and more accessible to non-experts. These higher-level languages are often compiled into machine language, which the computer can then execute. But in the early days of computing, programmers had no choice but to write code directly in machine language.

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both A and B

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A computer can be used for entertainment, information, and social media, so the answer is "none of the above". Computers are versatile machines that can perform a wide variety of tasks, including playing games, streaming videos, accessing news and other information, and connecting with others on social media platforms. While some computers may be designed or optimized for certain types of tasks, such as gaming or video editing, all computers are capable of handling entertainment, information, and social media to some extent. Therefore, the answer to this question is that there is no option that describes something a computer cannot be used for among the given choices.

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Dividing a number by zero is an impossible mathematical operation, which leads to a type of error called an "Arithmetic error". When a program encounters such an operation, it is unable to perform the calculation, and it generates an error message to indicate the issue. Arithmetic errors are a type of runtime error because they occur during the execution of the program, rather than during the compilation or writing of the code (syntax errors). Logical errors are different from arithmetic errors because they occur when the program's logic is flawed, leading to incorrect results. So, in summary, dividing by zero results in an arithmetic error because it is a mathematical impossibility that cannot be computed.

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Document readers are devices or software programs that can analyze and interpret written or printed text on a document. These devices can read different types of data from documents such as marks, handwritten and printed characters, and printed lines. Marks can include things like checkmarks or ticks that people might use to indicate a selection on a form or questionnaire. Handwritten characters are any letters, numbers or symbols that are written by hand, whereas printed characters are those that are produced by a printer. Printed lines refer to the lines of text that are printed on a page. Therefore, the correct answer is "all of the above" as document readers can read all of these types of data from documents.

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The example of an output device is a speaker. An output device is any device that receives information or data from a computer or electronic device and presents or displays it to the user in a perceivable format. In the case of a speaker, it receives sound data from a computer or electronic device and produces audible sound waves that can be heard by the user. Speakers are commonly used to play music, watch videos or movies, and listen to audio from video games. On the other hand, a keyboard and mouse are examples of input devices because they allow the user to input data or commands into a computer or electronic device. Similarly, a microphone is also an input device as it converts sound waves into electrical signals that can be processed by a computer or electronic device.

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The touchpad of a laptop serves the same function as a mouse. A touchpad is a flat surface on the laptop that you can slide your finger on to move the cursor on the screen. Just like a mouse, you can use the touchpad to select, click, and scroll. It provides an alternative to using a traditional mouse for navigation on the laptop.

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Internet Explorer is a web browser that is used to view web pages on the internet. It allows users to access different websites and view the content on those sites, such as text, images, videos, and other media. Internet Explorer is designed to make it easy for users to navigate the internet by providing tools such as search bars, bookmarks, and tabs. While it may be possible to play movies or music within Internet Explorer, its primary purpose is to browse the internet and display web pages.

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The option that does not belong to the group is "External memory". Primary memory, main memory, and internal memory are all types of memory that are directly accessible by the CPU (Central Processing Unit) of a computer. These types of memory are volatile, which means that they lose their data when the power is turned off. Primary memory is the smallest and fastest type of memory in a computer, and it includes the cache and registers. Main memory, also known as RAM (Random Access Memory), is the largest type of primary memory in a computer and holds the data and instructions that the CPU needs to access quickly. Internal memory refers to the storage capacity that is built into a device, such as a hard drive or a solid-state drive (SSD). This type of memory is non-volatile, which means that it retains its data even when the power is turned off. External memory, on the other hand, refers to any type of storage that is external to the device, such as a USB flash drive, an external hard drive, or a cloud-based storage service. While external memory can be used to store data, it is not considered to be a type of primary or internal memory because it is not directly accessible by the CPU. Instead, data must be transferred between external memory and primary or internal memory before it can be accessed by the CPU.