Multiple Choice Questions - Computer System Quiz

ALU stands for Arithmetic Logic Unit. It is a fundamental component of a computer's central processing unit (CPU) that performs arithmetic and logical operations on data. The ALU is responsible for executing operations such as addition, subtraction, multiplication, division, and logical comparisons. It plays a crucial role in the overall functioning of a computer by performing the necessary calculations and logical decisions required for processing data and executing instructions.

The correct answer is "World Wide Web." The term "WWW" stands for World Wide Web, which is a system of interconnected documents and other resources, linked by hyperlinks and URLs. It is a global information space where users can access various types of content, such as websites, web pages, images, videos, and more. The World Wide Web has revolutionized communication and information sharing, making it easy for people all over the world to access and exchange information.

The correct answer is "All of the above" because a computer consists of a central processing unit (CPU), which is responsible for executing instructions and performing calculations; a memory, which stores data and instructions for the CPU to access; and an input and output unit, which allows the computer to interact with the user and other devices. Therefore, all of these components are essential for a computer to function properly.

The ALU (Arithmetic Logic Unit) of a computer performs three decision-making operations: greater than, less than, and equal to. These operations are commonly used in comparison and conditional statements in computer programming. The ALU compares two values and determines whether one value is greater than, less than, or equal to the other. By including "All of the above" as the answer, it indicates that all three decision-making operations are performed by the ALU.

The CPU (Central Processing Unit) is often referred to as the brain of a computer system. It is responsible for executing instructions, performing calculations, and coordinating the activities of all the other hardware components. The CPU contains the ALU (Arithmetic Logic Unit) which performs mathematical and logical operations, the control unit which manages the flow of data and instructions, and the memory which stores data and instructions temporarily. Therefore, the CPU is the correct answer as it encompasses all the other options and is crucial for the functioning of a computer system.

The correct answer is Abacus. The abacus is considered to be one of the earliest calculating devices. It is a simple tool used for performing basic arithmetic calculations. The abacus consists of a series of rods or wires, with beads that can be moved back and forth along the rods. By manipulating the beads, users can perform addition, subtraction, multiplication, and division. The abacus has been used for centuries in various cultures around the world and is still used in some regions today.

A 3D printer is considered an output device because it takes digital designs and produces physical objects by layering materials. It receives data from a computer or other devices and uses it to create three-dimensional objects. Unlike the keyboard, mouse, and scanner, which are input devices that allow users to interact with and input data into a computer system, the 3D printer takes data from the computer and outputs it as a tangible object.

The correct answer is "Central processing Unit." CPU stands for Central Processing Unit, which is the primary component of a computer that carries out instructions and performs calculations. It is responsible for executing and coordinating most of the tasks in a computer system, including fetching, decoding, and executing instructions from the computer's memory. The CPU is often referred to as the "brain" of the computer as it controls and manages the overall operation of the system. Therefore, the correct full form of CPU is Central processing Unit.

The correct answer is "Graphical User Interface". GUI stands for Graphical User Interface, which refers to the visual elements and controls that allow users to interact with software or electronic devices. It provides a user-friendly and intuitive way to navigate and operate a system by using graphical icons, menus, and buttons instead of text-based commands.

A hard disk can store the maximum amount of data compared to the other storage devices listed. Hard disks have larger storage capacities, typically ranging from several hundred gigabytes to several terabytes, whereas floppy disks, compact disks, and magneto optic disks have much smaller storage capacities. Hard disks are commonly used in computers and servers to store large amounts of data, including operating systems, software applications, and user files. They are known for their high storage capacity, fast data access speeds, and durability, making them the preferred choice for storing large volumes of data.

The basic operations performed by a computer include arithmetic operations, logical operations, and storage and retrieval. Arithmetic operations involve performing mathematical calculations such as addition, subtraction, multiplication, and division. Logical operations involve evaluating conditions and making decisions based on them, such as comparing values or determining if a statement is true or false. Storage and retrieval operations involve saving and accessing data from memory or storage devices. Therefore, all of the given options are correct as they encompass the fundamental operations performed by a computer.

A byte consists of eight bits. In computer systems, a bit is the smallest unit of data and can have a value of either 0 or 1. A byte, on the other hand, is a group of eight bits and is used as a basic unit of storage in computer systems. It can represent a wide range of values and is commonly used to store characters, numbers, and other types of data. Therefore, the correct answer is eight bits.

ENIAC, UNIVAC, and EDVAC are all examples of electronic computers. However, ABC is not an electronic computer as it stands for Atanasoff-Berry Computer, which was the first electronic digital computer but was not fully functional and did not have the same capabilities as the other options listed.

The term gigabyte refers to a unit of digital information storage capacity that is equivalent to 1024 megabytes. It is commonly used to measure the capacity of computer storage devices, such as hard drives and memory cards.

A printer is not an input device because it is used to produce output in the form of physical copies of documents or images. Input devices are used to provide data or instructions to a computer, while printers are used to produce output from the computer. Therefore, a printer does not fit the definition of an input device.

COM (Computer Output to Microfilm) is not an input device because it is a technology used to convert digital computer output into microfilm. It takes the output from a computer and creates a microfilm copy of it. In contrast, input devices are used to input data or commands into a computer system. OCR (Optical Character Recognition), optical scanners, and voice recognition devices are all examples of input devices as they allow users to input data or commands into a computer system.

The ALU (Arithmetic Logic Unit) is the part of the computer that is used for calculating and comparing. It is responsible for performing arithmetic operations such as addition and subtraction, as well as logical operations such as AND, OR, and NOT. The ALU receives data from the memory and performs the necessary calculations or comparisons based on the instructions given by the control unit. It is an essential component of the CPU (Central Processing Unit) and plays a crucial role in executing instructions and processing data in a computer system.

The correct answer is "Binary codes" because instructions and memory addresses are typically represented using binary code, which consists of a series of 0s and 1s. Binary code is a common method of representing data in computer systems, as it allows for efficient storage and processing of information. Other options such as character code, binary word, and parity bit are not as commonly used for representing instructions and memory addresses.

The operation of "Understanding" is not performed by a computer. While computers are capable of inputting data, processing it, and controlling various tasks, they do not possess the ability to comprehend or understand information in the same way humans do. Computers rely on algorithms and programming to execute tasks, but they lack the cognitive capabilities necessary for true understanding.

A CD-ROM is a read-only memory storage device because it can only be used to read data that is already stored on it. It cannot be written to or modified, making it a permanent storage medium. In contrast, a floppy disk and a hard disk are both read and writeable, allowing users to store and modify data on them. Therefore, the correct answer is CD-ROM.

A touch screen is not considered a secondary memory device because it is primarily used for input and output purposes, allowing users to interact with a device through touch. Secondary memory devices are used for long-term storage and retrieval of data, such as tape drives, solid state drivers, and memory cards. These devices store data even when the power is turned off, whereas touch screens do not have the capability to store data in the same way.

The ALU (Arithmetic Logic Unit) of a computer responds to the commands coming from the Control Unit. The Control Unit is responsible for coordinating and controlling the activities of various components of the computer, including the ALU. It fetches instructions from primary memory, decodes them, and sends the appropriate signals to the ALU to perform the required arithmetic or logical operations. Therefore, the ALU responds to the commands given by the Control Unit.

Memory refers to the temporary storage of data that is currently being used by the computer. It is volatile, meaning that the data is lost when the computer is turned off. On the other hand, storage refers to the permanent storage of data that is not currently being used. It is non-volatile, meaning that the data remains even when the computer is turned off. Therefore, memory is temporary while storage is permanent.

Bytes are the best units of data on an external storage device because they represent the smallest addressable unit of data. External storage devices, such as hard drives or flash drives, store data in binary form, which is a combination of 0s and 1s. Each binary digit is called a bit, but bits alone are not practical for measuring or storing large amounts of data. Bytes, on the other hand, consist of 8 bits and are commonly used to represent a single character or a small piece of data. They provide a more convenient and efficient way to measure and organize data on external storage devices.

A microprocessor is a device that can understand the difference between data and programs. It is the central processing unit (CPU) of a computer system and is responsible for executing instructions and performing calculations. The microprocessor can interpret and process data as well as execute programs, making it capable of distinguishing between the two.

Operating systems, editors, and debuggers are all examples of system software. System software refers to programs that manage and control the computer hardware and provide a platform for running application software. Operating systems are responsible for managing computer resources, providing a user interface, and running other software. Editors are used for creating and modifying text files, while debuggers are tools used for finding and fixing errors in software code. Therefore, all three fall under the category of system software.

RAM (Random Access Memory) allows simultaneous read and write operations. Unlike ROM (Read-Only Memory) which is only capable of reading data and EPROM (Erasable Programmable Read-Only Memory) which requires erasing before writing, RAM can both retrieve and store data at the same time. This makes RAM a versatile memory type that is commonly used in computers and other electronic devices for temporary storage of data and program instructions.

The correct answer is ROM and RAM. ROM (Read-Only Memory) is a type of memory that stores permanent data and instructions that cannot be modified or erased. It is used to store firmware and other essential system data. RAM (Random Access Memory) is a type of memory that stores temporary data and instructions that can be read from and written to by the computer's processor. It is used to store data that is actively being used by the computer. Both ROM and RAM are types of primary memory, which is directly accessible by the processor.

The correct answer is "Binary digits". In computer systems, a bit is the smallest unit of information and can have two possible values, 0 or 1. These values are represented using binary digits, where 0 represents the absence of an electrical signal and 1 represents the presence of an electrical signal. Therefore, "Binary digits" accurately describes what a bit stands for in the context of computer systems.

A plotter is not an input unit device. It is an output device used to produce high-quality graphics or drawings on paper. Input unit devices are used to input data into a computer system, such as scanners which convert physical documents or images into digital format, cameras which capture images or videos, and digitizers which convert analog signals into digital format.

Machine language is considered to be machine dependent because it is specific to a particular computer architecture and cannot be directly executed on a different type of machine. It is also difficult to program in machine language as it requires a deep understanding of the computer's instruction set and binary representation. Additionally, programming in machine language is error-prone as even a small mistake in the code can lead to unexpected behavior or crashes. Therefore, all of the given options accurately describe machine language.

Application software refers to programs that are designed to perform specific tasks or functions for users. These programs are created to meet the needs of users and are often used to accomplish specific goals or solve particular problems. Unlike system software or utility programs, which are responsible for managing and maintaining the computer system, application software is focused on providing functionality and features that are relevant to the user's requirements. Operating systems, on the other hand, are responsible for managing computer hardware and software resources and providing a platform for other software to run on. Therefore, the correct answer is application software.

ENIAC was considered the first electronic computer until 1973 when the court invalidated its patent. ENIAC, short for Electronic Numerical Integrator and Computer, was developed during World War II and was a groundbreaking invention at the time. It was used for complex calculations and played a significant role in various scientific and military applications. However, in 1973, the court invalidated its patent due to prior work by other inventors, which led to a reevaluation of its status as the first electronic computer.

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The term "information" refers to properly arranged data. It implies that the data has been organized and structured in a meaningful way, making it useful and understandable. The other options, such as "field," "words," and "file," do not necessarily convey the same idea of organization and structure. Therefore, "information" is the most appropriate term to describe properly arranged data.

The given question asks for a form of data that is not included in the options. The options include numbers and characters, images, and sound, all of which are forms of data. Therefore, the correct answer is "None" as it indicates that none of the options listed are not forms of data.

The largest space among the given options is the petabyte. A petabyte is a unit of digital information storage that is equivalent to 1,000 terabytes or 1,000,000 gigabytes. It is a measure of storage capacity and is commonly used to describe large amounts of data, such as in big data analytics or cloud storage systems.

The correct answer is "Control unit, arithmetic-logic unit and primary storage." The CPU is the main component of a computer that performs most of the processing inside the computer. The control unit is responsible for coordinating and controlling the operations of the CPU, while the arithmetic-logic unit performs mathematical and logical operations. Primary storage, also known as main memory, is used to store data and instructions that are currently being processed by the CPU. Therefore, these three components are essential parts of the CPU.

The correct answer is Assembler. In assembly language, the translator program used is called an assembler. It converts the assembly language code into machine code, which can be directly executed by the computer's processor. Unlike compilers and interpreters, which are used for high-level programming languages, assemblers specifically work with assembly language instructions.

A web camera, also known as a webcam, is primarily used to capture video and transmit it to a computer or other device. It is designed to take input in the form of video and audio signals, making it an input unit device. While some webcams may have additional features such as built-in microphones or LED lights, their main function is to provide input by capturing video. Therefore, the correct answer is "input unit device."

Processing is the correct answer because it refers to the manipulation and transformation of data to produce meaningful and useful information. While a computer is the tool used for processing, it is the actual process of analyzing and organizing the data that turns it into valuable insights. Programming, on the other hand, involves writing code to instruct the computer on how to perform specific tasks, but it is not directly responsible for producing useful information out of data.

High level language is also called "problem oriented language" because it allows programmers to focus on solving problems rather than dealing with low-level details. It is also referred to as "business oriented language" as it is commonly used in business applications to automate processes and manage data. Additionally, high level language can be considered "mathematically oriented language" as it provides built-in functions and operations for mathematical calculations. Therefore, all of the given options are correct explanations for high level language.

The statement "It is understood by a computer" is valid. A computer program is a set of instructions written in a language that can be interpreted and executed by a computer. The programmer writes the program in a way that the computer can understand and execute. The user typically interacts with the program's interface but may not necessarily understand the underlying code or logic.

In 1837, Charles Babbage conceived the Analytical Engine. This was a mechanical general-purpose computer that he designed, which was considered to be the precursor to modern computers. Babbage's concept included features such as a control unit, arithmetic logic unit, and memory, making it a significant advancement in computing technology. The Analytical Engine was never fully built during Babbage's lifetime, but his ideas laid the foundation for future developments in the field of computing.

The given answer, "mechanical calculator," is correct because it accurately identifies the Abacus as the first mechanical calculator. The Abacus is an ancient counting tool that uses beads or stones to represent numbers and perform basic arithmetic operations. It predates electronic computers and electronic calculators, which were developed much later. The Abacus was widely used in various civilizations, such as the Chinese and Roman cultures, for centuries before the advent of more advanced calculating devices.

The ALU (Arithmetic Logic Unit) of a computer typically contains a number of high-speed storage elements called registers. Registers are small, fast memory units within the CPU that store data that is being actively used by the computer's processor. They are used to store operands, intermediate results, and addresses during the execution of instructions. Registers provide quick access to data, allowing the ALU to perform calculations and logical operations efficiently. Unlike semiconductor memory, hard disks, and magnetic disks, registers are located within the CPU itself and have much faster access times.

A high level language is a machine independence program because it is designed to be easily understood and written by humans. It uses English-like statements and abstracts away the details of the underlying hardware. This allows the same high level language program to be executed on different machines with different architectures and operating systems without any modifications. In contrast, low level language, assembly language, and machine language are all machine dependent as they directly interact with the hardware and are specific to a particular machine or architecture.

The output unit is responsible for converting computer data into a human-readable form. It takes the processed information from the computer and presents it in a format that can be easily understood by humans, such as displaying text or graphics on a monitor, printing documents, or playing audio through speakers. This unit plays a crucial role in making the information generated by the computer accessible and usable to humans.

The correct answer is Address Bus. The address bus is a physical connection that allows the microprocessor to communicate with the memory and other components of the microcomputer. It is used to transmit memory addresses, which specify the location of data or instructions in the memory. This allows the microprocessor to read or write data from or to specific memory locations. The address bus is an essential component for the microprocessor to access and control the memory and other parts of the microcomputer.

High density double sided floppy disks could store 1.44 MB of data.