JAMB UTME - Computer Studies - 2022

When does the output of a NOR gate =0?

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What differs a system software from application software?

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System software and application software are two broad categories of computer software, each with different functions and purposes. System software is a collection of programs that control and manage the basic operations of a computer system. It is designed to provide a platform for other software applications to run on. System software includes operating systems, device drivers, utilities, and other tools that enable the computer to operate and perform its functions. On the other hand, application software refers to programs that are designed to perform specific tasks or applications for the user. These programs are used for word processing, spreadsheets, photo editing, web browsing, and other specialized tasks. Application software is often created by third-party developers and can be installed and used by end-users. The main difference between system software and application software is the purpose they serve. System software is responsible for managing the hardware and providing a platform for other software to run on, while application software is designed to perform specific tasks for the user. Other differences between system software and application software include: - Ability to multi-task: System software is designed to manage and allocate system resources, while application software is designed to perform specific tasks. Therefore, system software has more multitasking capabilities than application software. - Minimal in terms of space: System software is usually larger in terms of size and requires more storage space than application software. - Presence of cache memory: System software may use cache memory to improve the performance of the computer system, while application software does not typically use cache memory. - Unique programs installed by the creators to help run the computer: System software includes programs that are installed by the computer manufacturer or operating system developer to help run the computer, such as device drivers and system utilities. Application software does not include these types of programs.

Which process is used by large retailers to study trends?

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Large retailers use data mining to study trends. Data mining is the process of analyzing large amounts of data and identifying patterns and trends in that data to make informed decisions. This can involve looking at customer behavior, sales data, market trends, and other types of data to gain insights into what products are popular, what customers are looking for, and how the market is changing. The goal of data mining is to help retailers make informed decisions about their business and stay ahead of the competition.

The windows explorer is divided into _________ categories.

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The Windows Explorer is divided into five categories, which are: 1. Quick Access: This category contains shortcuts to frequently accessed folders and files, such as the Desktop, Documents, and Downloads folders. 2. OneDrive: This category displays files and folders stored on OneDrive, Microsoft's cloud storage service. 3. This PC: This category displays all the drives and storage devices connected to the computer, including the hard drive, external drives, and USB flash drives. 4. Network: This category displays other devices on the local network, such as other computers or printers that are connected. 5. Recycle Bin: This category contains files and folders that have been deleted from the computer and are waiting to be permanently deleted or restored. These categories help users easily navigate and find files and folders on their computer, as well as access files and folders stored in the cloud or on other devices connected to the network.

Why is the base 10 system unique?

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The base 10 system, also known as the decimal system, is unique because it is the most widely used number system in the world and has been adopted by nearly all cultures and civilizations. The reason for this widespread usage is that it is based on the number of human fingers, with 10 being the number of digits on two hands. This made it a convenient and intuitive system for early humans to count and perform mathematical operations with. Additionally, the base 10 system allows for easy representation of numbers using only 10 symbols (0 to 9), making it simple to write, communicate, and perform mathematical operations with larger numbers.

Storage which retains data after power cut off is called.

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The type of storage that retains data even when the power is turned off is called non-volatile storage. Non-volatile storage is different from volatile storage, which loses all data when the power is turned off. To help you understand the difference, imagine that you have two types of memory: a whiteboard and a notebook. The whiteboard is like volatile memory because anything you write on it will disappear as soon as you erase it or turn off the lights. On the other hand, the notebook is like non-volatile memory because anything you write in it will remain there until you deliberately erase or destroy it. Similarly, non-volatile storage, such as hard drives, solid-state drives (SSDs), and flash drives, can retain data even when the power is turned off. This is because the data is stored using physical means that do not require an electrical charge to be maintained. In contrast, volatile storage, such as RAM, loses all data when the power is turned off because the data is stored using electrical charges that require a constant supply of power to be maintained. Overall, non-volatile storage is essential for long-term data storage because it can retain data even in the absence of power, whereas volatile storage is useful for short-term storage of data that does not need to be preserved beyond the current session or power cycle.

Programming language COBOL works best for use in

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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.

In the files, if order of operation on two or more files are similar, then operation will be

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If the order of operation on two or more files is similar, then the operation will be sequential. Sequential operation means that the files will be processed one after the other in the same order as specified. For example, if we have two files A and B, and we want to perform the operations 'read', 'process', and 'write' on them in the order A->B, then the program will first read file A, process it, write the result, then move on to file B, read it, process it, and write the result. On the other hand, if the order of operation is not similar, the operation may be more complex or combinational. In that case, the files may be processed in a different order or simultaneously, which may require more complex programming logic. Therefore, having a similar order of operation on multiple files simplifies the programming and makes it more straightforward.

Which of the following is not a model used in problem solving?

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Among the options given, critical thinking is not a model used in problem solving. Critical thinking is a mental process that involves analyzing and evaluating information, reasoning, and making decisions. It is a skill that is used to approach problems in a thoughtful and logical way. However, it is not a formal problem-solving model that provides a structured approach to solving a problem. On the other hand, SDLC (Software Development Life Cycle), waterfall, and prototype are models used in problem solving. SDLC is a structured approach used to develop and maintain software. It involves a series of phases that includes planning, analysis, design, implementation, and maintenance. This model provides a framework to guide the development of software systems. Waterfall is a linear sequential approach to software development where each phase must be completed before the next phase can begin. It is a model used to manage the development of software systems, and it emphasizes the importance of planning and documentation. Prototype is a model used in problem solving where a working model of a product or solution is developed to test and refine its features and functionalities. It is used to gather feedback and identify areas for improvement before the final product is developed. In summary, critical thinking is a mental process that is used in problem solving, but it is not a formal problem-solving model. SDLC, waterfall, and prototype are examples of problem-solving models that provide structured approaches to solving problems in various fields.

Which of these application packages is mostly used by computer users?

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Out of the options given, Microsoft Excel and Microsoft Word are the two most commonly used application packages by computer users. Microsoft Excel is a spreadsheet application that allows users to create, edit, and analyze numerical data in a structured manner. It is widely used by businesses and individuals for tasks such as financial analysis, budgeting, data management, and statistical analysis. Microsoft Word, on the other hand, is a word processing application used for creating and editing text-based documents. It is used for a wide range of purposes, such as writing reports, letters, resumes, and academic papers. While CorelDraw is a graphic design software used for creating vector graphics and Ms Access is a database management system used for storing, managing and retrieving data, they are not as commonly used as Microsoft Excel and Microsoft Word in day-to-day computer usage.

A collection of facts and figures is known to be _________

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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.

Typically, an ATM is used for

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An ATM, or Automated Teller Machine, is typically used for withdrawing cash. It is a machine that allows customers of a financial institution to perform financial transactions, such as withdrawing cash, checking their account balance, or depositing money, without the need to visit a bank branch. ATMs are widely available and can be found in many public places such as shopping centers, airports, and gas stations. They provide customers with convenient access to their money 24 hours a day, seven days a week.

The Internet is an example of which computer network?

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The Internet is an example of a wide area network (WAN). A WAN is a type of computer network that covers a large geographical area, such as a city, a country, or even the entire world. The Internet is a global network of interconnected computers, servers, and other devices that communicate with each other using standardized communication protocols. It allows users to access and exchange information and resources, such as email, websites, and online services, from anywhere in the world. WANs are typically composed of multiple smaller networks, such as local area networks (LANs) and metropolitan area networks (MANs), connected together using high-speed communication links, such as satellite, cable, or telephone lines. The Internet is an example of a WAN because it spans multiple countries and continents, connecting millions of devices and users in a single network.

Which is not a network for distribution of information?

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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.

The logical structure of the database can be depicted through its ______

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The logical structure of a database can be depicted through its data model. A data model is a conceptual representation of data and the relationships between data elements in a database. It defines the structure of the database, including tables, columns, and the relationships between them. The data model can be thought of as a blueprint or a map for the database, showing how data is organized and how it can be accessed. It is an abstract representation of the database, separate from the specific software or hardware used to implement it. By using a data model, designers and developers can ensure that the database is structured in a logical and consistent way, which can improve performance, scalability, and ease of use.

Which of the listed is not a type of computer application?

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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.

A permanent memory, which has data and instruction to start up the computer and does not erase data after power off.

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The permanent memory that has data and instructions to start up the computer and does not erase data after power off is called ROM (Read-Only Memory). ROM is a type of computer memory that is pre-programmed with data and instructions during manufacturing. This means that once the data and instructions are written into ROM, they cannot be changed or erased, hence the name "read-only". When you turn on your computer, the CPU (central processing unit) looks to the ROM for the instructions on how to boot up the computer. These instructions include basic input/output system (BIOS) code that checks the hardware components to make sure they are working properly, and then loads the operating system from the hard drive or another storage device. The data and instructions stored in ROM are not affected by power outages or restarts, meaning that they are retained even when the computer is turned off. This is why ROM is called non-volatile memory. In summary, ROM is a type of permanent memory that contains data and instructions to start up a computer and does not lose this information when the computer is turned off.

Fire fox is an example of __________

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Firefox is an example of application software. Application software is a type of software that is designed to perform specific tasks for the user, such as creating documents, browsing the web, sending emails, etc. In other words, it is a program that is used to accomplish specific tasks and is meant to be used by the end-user, as opposed to system software, which is designed to run the computer itself and support the application software. Firefox is a web browser, which is a type of application software that allows users to access, browse and interact with websites on the Internet.

Firefox is an example of __________

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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.

The process of feeding instructions into the computer system is called

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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.

Which type of network can span several building, but is usually less than 30 square miles big?

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The type of network that can span several buildings but is usually less than 30 square miles big is called a MAN (Metropolitan Area Network). A MAN is a network that covers a larger geographical area than a LAN (Local Area Network) but is smaller than a WAN (Wide Area Network). It typically spans across a city or a town, connecting various LANs within its area. MANs are designed to provide high-speed connectivity between different locations within a metropolitan area, allowing users to share resources and information. They can be owned and managed by a single organization or shared by multiple organizations, such as service providers or government agencies. Some examples of MAN technologies include Fiber Distributed Data Interface (FDDI), Asynchronous Transfer Mode (ATM), and Ethernet.

What is the major purpose of application software?

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The major purpose of application software is to help people perform specific tasks. It provides user-friendly interface to interact with computer systems and accomplish tasks such as word processing, creating spreadsheets, managing databases, playing games, and much more. In short, it is designed to make the user's work easier and more efficient, allowing them to accomplish their work goals with the help of the computer.

The acronym IP address has its full meaning to be _________

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The acronym "IP address" stands for "Internet Protocol address". An IP address is a unique numerical identifier assigned to each device connected to the internet. Think of it like a phone number for your computer or other device. When you visit a website, your device sends a request to the website's IP address and then the website responds by sending the requested information back to your device's IP address. This is how devices on the internet communicate with each other.

Which of the following is not a type of computer on the basis of operation?

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The computer type that is not based on the operation is "Remote." This is because "remote" does not refer to how a computer operates, but rather where it is located or how it is accessed. A remote computer is one that is accessed through a network connection, such as the internet, rather than being physically present with the user. On the other hand, "analog" and "digital" are types of computers based on their method of operation. Analog computers operate by processing continuous physical variables such as voltage, while digital computers operate by processing discrete data in the form of binary digits (bits). Finally, "hybrid" computers are a combination of both analog and digital computers, where they use both continuous and discrete data to perform calculations.

In Microsoft Excel, sheet tabs can be renamed by ______

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Sheet tabs in Microsoft Excel can be renamed by double-clicking on the sheet tab and entering the new name. To do this, simply click on the sheet tab that you want to rename and wait for it to become active. Then, double-click on the tab, and the name will become editable. Type in the new name you want for the sheet and press the Enter key or click outside the tab to save the changes.

What is the function of firewall?

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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.

What is the permanent memory built into your computer called?

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The permanent memory built into a computer is called ROM (Read-Only Memory). It is called "read-only" because, unlike RAM (Random Access Memory), which can be written to and rewritten, the information stored in ROM cannot be changed by the computer or the user. ROM is a type of memory that is built into the computer's hardware and contains the basic instructions that the computer needs to boot up and run its basic functions. These instructions are often referred to as the "firmware" of the computer, and include the BIOS (Basic Input/Output System) that controls the startup process, as well as other low-level software that interacts directly with the computer's hardware. CD-ROM, on the other hand, is a type of storage medium that can be used to store data or programs, but it is not built into the computer itself. CDs and DVDs can be used to store data, programs, or other types of media, but they are not considered a type of permanent memory built into the computer.

The super computers are mainly used for

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Supercomputers are high-performance computers designed for handling extremely complex and large-scale computational tasks. They are mainly used for mathematical intensive scientific applications, such as simulating complex physical phenomena, weather forecasting, and drug discovery. Supercomputers can perform a vast number of calculations in a short amount of time, which is essential for solving complex problems. These computers are designed to handle massive amounts of data and perform complex algorithms, making them ideal for handling input-output intensive processing tasks. Although they can retrieve data and manipulate records like any other computer, their true power lies in their ability to perform mathematical calculations and simulations that would be impossible for regular computers. Supercomputers are used in a wide range of fields, including aerospace, automotive, energy, finance, and healthcare, to name a few. Their use has led to breakthroughs in many fields and has contributed significantly to scientific and technological advancements.

Which of the following is termed as the minimum error code?

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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.

Which of the following is an example of software

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An example of software is Operating Systems. Software is a set of instructions that tell a computer what to do. It is a type of computer program that is designed to perform specific tasks on a computer or other electronic device. Operating systems are a type of software that controls the basic functions of a computer, such as managing its memory and processing power, and providing a platform for other software to run on. A Joystick, Keyboard, and Mouse are examples of hardware, which are physical devices that are used to input information into a computer or other electronic device.

Which of the following is not a type of computer network?

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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.

Encryption helps with what?

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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.

CPU stands for ________________.

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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.

Which can be the input and output devices both?

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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.

_______ is the process of finding errors and fixing them within a program.

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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.

Which program translates programs to a simpler language that the computer can execute.

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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.

Computer Monitor is also known as

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A computer monitor is also known as a VDU, which stands for "Visual Display Unit." This is because the monitor is responsible for displaying the visual output of the computer, allowing you to see the information, images, videos, and graphics that are generated by the computer's software. The VDU or monitor is an essential part of any computer setup, and without it, you wouldn't be able to interact with your computer in a meaningful way. So, in short, a computer monitor and a VDU are the same thing! As for the other options, DVU, UVD, and CCTV are not commonly used terms for a computer monitor.

.......... provides total solutions to reduce data redundancy, inconsistency, dependence and unauthorized access of 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.

he binary system has the radix of ________

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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.

Which part of a processor contains the hard ware necessary to perform all the operations required by a computer?

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The part of a processor that contains the hardware necessary to perform all the operations required by a computer is the "Data path". The data path, also known as the "Arithmetic Logic Unit" (ALU), is a component of the processor that performs arithmetic and logical operations on data. It is responsible for carrying out the instructions of the computer program, performing calculations, and manipulating data. The controller, registers, and cache are also important components of a processor, but they do not contain the hardware necessary to perform all the operations required by a computer. The controller, also known as the "Control Unit", is responsible for directing the flow of data and instructions within the processor, as well as between the processor and other components of the computer. Registers are high-speed storage locations within the processor that store data temporarily for processing. Cache is a small amount of high-speed memory that stores frequently used data and instructions, making them quickly accessible to the processor. Therefore, out of the given options, the data path or ALU is the part of the processor that contains the hardware necessary to perform all the operations required by a computer.