JAMB UTME - Computer Studies - 2022

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Microsoft Word is not a network for the distribution of information. Microsoft Word is a word processing software that is used to create, edit, and format documents. It is not a network because it does not distribute information, it is used to create and store information on a single device or in a cloud storage service. On the other hand, cloud storage, several computers to one printer, and e-mail are all examples of networks that distribute information.

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COBOL, which stands for COmmon Business Oriented Language, is a programming language that is specifically designed for commercial applications. It was developed in the 1950s for business data processing, and it remains a popular choice for applications related to finance, banking, insurance, and other industries that handle large amounts of data. COBOL is known for its straightforward syntax and ability to process large amounts of data efficiently, making it a good choice for commercial applications that need to manage and manipulate financial records, inventory, and other types of business data.

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A DBMS (Database Management System) provides comprehensive solutions to reduce data redundancy, inconsistency, dependence, and unauthorized access of data. Data redundancy refers to the duplication of data in a database, which can lead to inconsistencies and take up unnecessary storage space. A DBMS helps to eliminate data redundancy by ensuring that each piece of data is stored only once and is consistently maintained. Data inconsistency refers to the occurrence of conflicting data in a database, which can lead to problems when trying to make decisions based on the data. A DBMS helps to maintain data consistency by enforcing constraints and rules that ensure that data is entered consistently and accurately. Data dependence refers to the relationship between different pieces of data in a database. A DBMS helps to reduce data dependence by allowing data to be stored in separate tables and establishing relationships between those tables. This reduces the risk of changes in one table affecting the data in another table. Finally, a DBMS provides security features to prevent unauthorized access to the data stored in the database. This includes controlling access to the database through user authentication and authorization, as well as ensuring that sensitive data is encrypted to protect it from being accessed by unauthorized individuals. In short, a DBMS provides a centralized and organized way to store, manage, and secure data to ensure its accuracy, consistency, and security.

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The device primarily used to provide hardcopy is the "printer". A printer is a device that produces a physical or hardcopy of electronic documents or images, typically on paper. It can be connected to a computer or other device through a cable or wireless connection, and it can print text, graphics, or images in black and white or color. Printers come in many different types, including inkjet, laser, and thermal, and they can be used in homes, offices, and other settings. Card readers, computer consoles, and CRTs (cathode ray tubes) are not primarily used to provide hardcopy. A card reader is a device used to read information from a magnetic stripe or chip on a plastic card, such as a credit card. A computer console is the part of a computer system that contains the keyboard, monitor, and other components used to interact with the computer. A CRT is an older type of display technology that was used in older computer monitors and televisions, but has largely been replaced by newer technologies such as LCD and LED displays.

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Encryption helps with safe delivery of messages to their destination without being accessed by a third party. Encryption is a process of converting plain text into coded or scrambled text so that only authorized parties who have the key can access and understand the original message. This means that even if an unauthorized person intercepts the message during transit, they cannot read or understand it because it is encrypted. Encryption is commonly used to protect sensitive data such as passwords, credit card numbers, and personal information when it is transmitted over the internet. It also helps to protect confidential business or government communications from hackers, cybercriminals, and other unauthorized third parties. Therefore, encryption helps to ensure that messages are delivered safely and securely to their intended recipients without being accessed or intercepted by unauthorized parties.

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The option that is not a type of logic gate is "DOR" because it is not a commonly used logic gate in digital electronics. Logic gates are the building blocks of digital circuits, and they perform basic logical operations on input signals to generate output signals. The three most commonly used types of logic gates are XOR, OR, and AND. XOR (exclusive OR) gate generates a high output only when the inputs are different, and a low output when they are the same. It is commonly used in digital communication systems and encryption algorithms. OR gate generates a high output if any of its inputs are high, and a low output if all of its inputs are low. It is used to combine multiple input signals in digital circuits. AND gate generates a high output only when all of its inputs are high, and a low output if any of its inputs are low. It is used to implement logical conjunction (AND) in digital circuits. In summary, DOR is not a type of logic gate because it is not commonly used in digital electronics. The commonly used types of logic gates are XOR, OR, and AND.

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The brain of the computer is considered to be the "Central Processing Unit" (CPU). The CPU is the primary component of a computer that performs most of the processing and calculations required to run programs and applications. It is responsible for executing instructions and controlling the operations of the computer's other hardware components, such as the memory, input/output devices, and storage devices. The CPU is often referred to as the "brain" of the computer because it performs many of the same functions that the human brain does, such as processing information, making decisions, and controlling the body (or in the case of the computer, the hardware components). It is located on the motherboard of the computer, and it consists of a small chip that contains millions of transistors and circuits that work together to perform calculations and operations at incredible speeds. While the monitor/display screen, mouse, and printer are all important components of a computer system, they do not serve the same function as the CPU. The monitor/display screen displays the output from the computer, the mouse is an input device used to control the cursor on the screen, and the printer is a device used to produce hardcopy output from the computer.

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The option that is not used to navigate in a computer is the scanner. A scanner is a device used to convert physical documents and images into digital format so that they can be stored and processed on a computer. It is not used to navigate a computer, but rather to input physical content into it. On the other hand, the cursor, keyboard, and mouse are all used for navigating a computer. The cursor, typically controlled by a mouse, touchpad or trackpad, allows you to select items and move around the screen. The keyboard is used to input text and commands, and the mouse is used to click and drag items on the screen. So in summary, the scanner is not used for navigating a computer, whereas the cursor, keyboard, and mouse are commonly used for this purpose.

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The correct answer is "Data". Data refers to a collection of facts, figures, or information that can be processed or analyzed to gain insights or make informed decisions. Data can come in different forms, such as numbers, text, images, audio, or video. It can be stored in various formats, including spreadsheets, databases, documents, or files. For example, if you have a list of customer names, addresses, and phone numbers in a spreadsheet, this is considered data. If you store this information in a database, it becomes a structured collection of data that can be easily accessed and manipulated. However, whether the data is sequenced or structured depends on how it is organized, and it is not a defining characteristic of data itself.

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The number of input combinations for a 4-input gate is 16. To understand why, you can think of each input as having two possible states, either 0 or 1. For a 4-input gate, there are 4 inputs, and each input can be in one of two states. Therefore, the total number of possible input combinations is 2 x 2 x 2 x 2 = 16. To illustrate this further, you can create a truth table that lists all possible input combinations and their corresponding output values for the gate. The truth table will have 16 rows, with each row representing a unique combination of input values.

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Computer files can be characterized by their title, accessibility, ability to be modified, and where they are stored. The title of a file is simply its name, which can be used to help identify and organize it among other files. Accessibility refers to whether or not a file can be accessed or viewed by the user. Depending on the permissions set by the owner of the file, it may be accessible to everyone, only to specific users, or not accessible at all. The ability to be modified refers to whether or not the file can be edited or changed in some way. For example, a text file can be modified by adding, deleting, or changing the text within it. Where the file is stored refers to the location on a computer or network where the file is saved. This could be on the computer's hard drive, a USB drive, a cloud storage service, or a network server. Therefore, all four of these characteristics are applicable to computer files and are important to consider when working with them.

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The type of network that is usually contained inside one office building is called a Local Area Network or LAN. A LAN is a computer network that connects devices within a relatively small area, such as a single building, office, or campus. It is designed to allow computers and other devices to communicate with each other and share resources, such as printers, files, and internet access. LANs are typically owned and operated by a single organization, such as a business or government agency, and are often built using Ethernet cables or Wi-Fi technology. LANs are used to facilitate communication and data sharing between employees within an office building or other confined area, and are often more secure than other types of networks because they are not connected to the internet. In summary, a LAN is the type of network that you would most commonly find inside one office building.

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Sensitive data can be protected from prying eyes using encryption. Encryption is the process of converting data into a code or a form that cannot be easily understood without a special key or password. When data is encrypted, it is scrambled and transformed into a form that is not easily recognizable. The only way to unlock or decrypt the data is to have the specific key or password that was used to encrypt it. This means that even if someone gains unauthorized access to the encrypted data, they will not be able to read or understand it without the key or password. Encryption can be applied to many types of sensitive data, including passwords, financial information, personal data, and sensitive documents. It can be used to protect data both while it is being transmitted (e.g., through email or messaging) and while it is being stored (e.g., on a computer or server). In summary, encryption is a powerful tool for protecting sensitive data from prying eyes, by converting it into a code or a form that is not easily recognizable without the specific key or password that was used to encrypt it.

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System software can further be classified into two categories: Operating software and Utility software. Operating software, also known as an Operating System (OS), is the main type of software that controls and manages all the other software and hardware on a computer. It acts as an intermediary between the computer hardware and the applications you use. Examples of operating systems include Windows, macOS, and Linux. Utility software, on the other hand, is a type of system software designed to help manage, maintain, and optimize the computer system. Examples of utility software include anti-virus software, file management systems, and storage management software. These types of software provide specific functions that help you keep your computer running smoothly and efficiently.

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The process of dividing a disk into tracks and sectors is called "formatting". Formatting prepares a new disk for use by creating a file system that can store and organize data. Tracks are circular paths on the disk, and sectors are small sections within each track. By dividing the disk into tracks and sectors, formatting allows the operating system to efficiently read and write data to the disk. Think of it like drawing lines on a blank piece of paper to create a grid. The grid allows you to organize your content and write in an orderly manner. Similarly, formatting divides the disk into a grid-like structure that the computer can use to organize and store data.

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The combination of the arithmetic and logic units, as well as the control unit makes up the central processing unit (CPU). A CPU is the "brain" of a computer. It is responsible for executing instructions and performing calculations. The arithmetic and logic units (ALU) are the parts of the CPU that perform mathematical operations, such as addition, subtraction, multiplication, and division, as well as logical operations, such as AND, OR, and NOT. The control unit is responsible for controlling the flow of data and instructions within the CPU and between the CPU and other parts of the computer, such as memory and input/output devices. It fetches instructions from memory, decodes them to determine what operation to perform, and then directs the ALU to perform the operation. In summary, the combination of the ALU and control unit makes up the CPU, which is responsible for processing data and instructions and performing calculations in a computer.

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The Caps key on a keyboard is used to switch between upper and lower case letters. When you press the Caps key, it changes the letter case of the letters you type from lowercase to uppercase or vice versa. This means that if you type with the Caps key on, all the letters you type will appear in uppercase. Similarly, if you type with the Caps key off, all the letters you type will appear in lowercase. This feature is particularly useful when you want to emphasize certain words or phrases, such as in titles or headings. It can also be used to make your text easier to read by adding some variety to the letter case. For example, when typing a password or other sensitive information, you may want to use a combination of upper and lower case letters to make it more secure. In summary, the Caps key is used to switch between uppercase and lowercase letters in order to make text easier to read, emphasize words, or add security to sensitive information.

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MS-DOS cannot be categorized as an application software. MS-DOS is an operating system, not an application. An operating system is the underlying software that manages and controls the hardware and software resources of a computer. An application software, on the other hand, is a program designed to perform a specific task, such as word processing, spreadsheets, or database management.

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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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The process of feeding instructions into a computer system is called "inputting." It involves providing data, commands, or other types of information to a computer system so that it can process and execute the instructions. When you input data or commands into a computer system, you typically use an input device such as a keyboard, mouse, or microphone to provide the information. The computer then processes the input data using its internal logic and algorithms, and generates an output based on the instructions it received. For example, when you type a document using a keyboard and input the data into a word processing software, the computer processes the text and generates an output in the form of a document that you can save, print, or share. In summary, inputting is the process of providing information or instructions to a computer system, which is then processed and executed by the computer to generate an output.

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The tier in which the database resides along with the query processing language is called the data tier. In software architecture, the data tier is one of the three layers of a typical multi-tier architecture, with the other two being the presentation tier (dealing with the user interface) and the application tier (containing the business logic). The data tier is responsible for managing the storage and retrieval of data, as well as the processing of queries that operate on that data. The data tier typically consists of one or more database management systems (DBMS), which are specialized software systems designed to manage large amounts of structured data. The DBMS provides a structured way to store data and a language for querying and manipulating that data, such as SQL (Structured Query Language). In summary, the data tier is the layer in a multi-tier software architecture where the database resides, and where queries are processed using a specialized query language like SQL. It is responsible for managing the storage and retrieval of data in an efficient and secure manner.

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A computer file is a place on a computer where information is stored in a package. A file can contain many different types of information, including text, images, audio, video, and executable programs. The information in a file is organized in a specific format, and the file can be opened and edited using appropriate software. For example, a text file contains plain text, while a Word document file contains formatted text and other elements like images and tables. A file is often saved with a specific name and extension that identifies the type of file and the type of information it contains. The extension is the part of the file name that comes after the dot, such as ".txt" for a plain text file or ".docx" for a Microsoft Word document file.

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The process of finding errors and fixing them within a program is called debugging. When a program is being developed, it may contain errors, also known as bugs, that prevent it from functioning properly. Debugging is the process of identifying and fixing these errors. Debugging can involve a number of techniques, such as analyzing error messages, reviewing code, and stepping through the program line by line to find where errors occur. Once an error is identified, the programmer can make changes to the code to correct the issue. Compiling is the process of translating source code into machine code, which can then be executed. Execution is the process of running a program. Scanning, in the context of programming, typically refers to the process of analyzing code for security vulnerabilities rather than identifying and fixing errors. In summary, debugging is the process of identifying and fixing errors in a program, whereas compiling, executing, and scanning are different processes that serve different purposes in the development and operation of a program.

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Computers are commonly used in offices for a variety of tasks, but some of the major purposes include: 1. Creating and editing documents: Computers are used to create and edit documents such as letters, reports, presentations, and spreadsheets. This is because computers offer a range of software applications that allow users to create and edit documents easily and quickly. 2. Communication: Computers are used to communicate with other employees, clients, and customers through email, video conferencing, and instant messaging. 3. Data management: Computers are used to store and manage data such as customer information, financial records, and inventory lists. This is because computers offer software that allows users to organize and track data efficiently. 4. Accounting: Computers are used for accounting purposes such as bookkeeping, payroll, and invoicing. This is because computers offer specialized software that allows users to manage financial data accurately and quickly. 5. Security: Computers are also used for security purposes such as monitoring and controlling access to sensitive data and systems. This is because computers offer software and hardware tools that can be used to safeguard against unauthorized access and cyber threats. Overall, computers have become an essential tool in the modern office environment, enabling employees to work more efficiently, communicate more effectively, and manage data and information more securely.

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both A and B

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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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Out of the given options, Dynamic RAM (DRAM) must be refreshed many times per second. DRAM is a type of computer memory that stores data in a capacitor within each memory cell. The capacitor can hold a charge, representing either a 0 or 1, but it gradually leaks over time, meaning that the data will eventually fade away. To prevent this data loss, the memory controller sends a refresh command to the DRAM chip many times per second. This refresh command recharges the capacitors in the memory cells to maintain the data stored in them. In contrast, Static RAM (SRAM) does not require refreshing, as it uses a different type of storage element that does not leak charge like a capacitor. EPROM and ROM are non-volatile memory types, meaning that they retain data even without power, and do not require refreshing.

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The acronym for DATABASE MANAGEMENT SYSTEM is DBMS, which stands for "Database Management System". A database is an organized collection of data that can be stored, accessed, and managed easily. However, managing large amounts of data can be complicated, which is where a Database Management System comes in. A DBMS is a software system that allows users to create, modify, and manipulate databases. It provides tools to organize and store data efficiently, as well as tools to retrieve and analyze that data. In summary, DBMS is an abbreviation for Database Management System, a software system used to manage and organize data efficiently.

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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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The type of computer network that is not among the options is DAN (Distributed Area Network). The other three options are all types of computer networks: VPN (Virtual Private Network) is a type of network that allows remote users to securely access a private network over the internet. CAN (Controller Area Network) is a type of network used in industrial and automotive applications to connect electronic devices such as sensors and controllers. WLAN (Wireless Local Area Network) is a type of network that uses wireless technology to connect devices within a limited geographic area, such as a home, office, or campus. Therefore, DAN is not a commonly used type of computer network.

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The binary system has a radix of 2. The radix of a number system is the number of unique digits used in that system. For example, in the decimal system (base 10), the radix is 10, because we use 10 unique digits (0 to 9) to represent numbers. In the binary system (base 2), the radix is 2, because we only use 2 unique digits: 0 and 1. This means that every number can be represented as a combination of only 0s and 1s in the binary system.

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The correct answer is "bugs and viruses." Bugs are errors or defects in computer software that can cause the system to behave unexpectedly or not function properly. They can affect the efficiency and effectiveness of a computer system by slowing it down, causing crashes, or producing incorrect results. Viruses, on the other hand, are malicious software programs that can infect a computer system and cause harm. They can also affect the effectiveness of a computer system by causing it to slow down or crash, stealing personal information, or spreading to other systems. Anti-virus programs are software tools designed to detect and remove viruses from a computer system. While they can help mitigate the negative effects of viruses, they are not a complete solution and cannot prevent all types of viruses from infecting a system.

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There are some devices that can be used as both input and output devices. These are: 1. Touch screen monitor: A touch screen monitor can be used as both an input and output device. It can display information to the user and also accept input from them through touch. 2. Digitizer: A digitizer is another device that can act as both an input and output device. It is used to convert analog signals, such as handwriting or sketches, into digital form. It can also display the digital output on a screen. In contrast, devices like a scanner and speaker are typically designed to perform just one function. A scanner is primarily an input device that converts physical documents into digital images, while a speaker is an output device that produces sound. To summarize, touch screen monitors and digitizers can be used as both input and output devices, while scanners and speakers are typically limited to a single function.

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The term that describes accessing files from a computer other than the one where the files are stored is "remote access". Remote access means that you can access files, data or resources from a different computer or server that is located elsewhere, using a network connection like the internet. This allows you to work with files and data as if they were stored on your local computer, even though they are actually stored on a different computer or server. For example, if you are working from home and need to access files that are stored on your work computer, you can use remote access to connect to your work computer over the internet and access those files. Similarly, if you use cloud storage services like Dropbox or Google Drive, you can access your files from any computer with an internet connection, which is also a form of remote access.

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Destruction of files for malicious reasons, such as access by fraudulent people, is classified as "unauthorized access". This means that someone who is not authorized to access the files has gained access to them, and has intentionally damaged or deleted the files. This type of access is illegal and is a violation of the owner's rights to the information stored in the files.

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Applications on a screen are displayed by icons. An icon is a small graphical representation of a program or file. It serves as a visual shortcut to launch the program or open the file. When you tap or click on the icon, the associated application or file opens. Icons are usually displayed on the home screen or app drawer, which are part of the graphical user interface of a device. The home screen is the main screen where you can see all your apps and shortcuts, while the app drawer is a menu that contains all the apps installed on your device.

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CPU stands for Central Processing Unit. It is the primary component of a computer system that carries out instructions of a computer program. The CPU is often referred to as the "brain" of the computer, as it performs the majority of the calculations and operations that are necessary for the computer to function. The CPU is responsible for fetching instructions from the computer's memory, decoding those instructions, executing them, and then storing the results back in memory. It is made up of several sub-components, including the arithmetic logic unit (ALU) which performs mathematical operations, and the control unit (CU) which manages the flow of data and instructions within the CPU and to other parts of the computer system.

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The 2-input gate that can be used to pass a digital waveform unchanged at certain times and inverted at other times is the XOR (exclusive OR) gate. An XOR gate has two input signals and one output signal. The output is HIGH (1) if the two input signals are different, and LOW (0) if the two input signals are the same. In other words, an XOR gate produces an output signal that is the "exclusive or" of its two input signals. When one of the input signals is held at a constant logic level (either HIGH or LOW), the XOR gate can be used to pass the other input signal unchanged or inverted, depending on the value of the constant signal. If the constant signal is HIGH, the output signal will be inverted; if the constant signal is LOW, the output signal will be unchanged. This property of the XOR gate makes it useful in digital electronics for a variety of applications, such as data encryption, error detection and correction, and clock synchronization.

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The correct answer is "Directories." Directories are special files that organize the hierarchical structure of the file system by grouping related files together into named collections. They act like folders, allowing users to easily locate and access the files they need. Each directory can contain other directories (sub-directories) and files. For example, in a Windows system, the "C:\Users" directory contains a sub-directory for each user account on the computer, and each user account directory contains sub-directories for documents, pictures, music, etc. In short, directories allow us to maintain a structured and organized file system.