Computer Science General Knowledge Questions and Answers

Answer: D) 8 bits

Explanation:

4 bits equal to 1 nibble and 8 bits is equal to 1 byte.

Answer: B) Search Engine

Explanation:

Google is a Search Engine. It's the most popular search engine used to search for user queries. Its URL is https://www.google.co.in/

Answer: B) Output

Explanation:

The printer is an example of the output device. This device is used to print the output on pages.

Answer: A) Random Access Memory

Explanation:

RAM stands for Random Access Memory. It is used to store data that needs to be accessed quickly.

Answer: C) Mark Zuckerberg

Explanation:

Mark Zuckerberg is the founder of Facebook. This was founded in 2004.

Answer: A) Vaccum tubes

Explanation:

The duration of the first generation computer was from 1946-1959. Vacuum tubes were used in this generation as basic components for memory and circuitry for the CPU. Learn more on Computer Generations.

Answer: B) Arithmetic and Logical Unit

Explanation:

The Arithmetic and Logical Unit performs Arithmetic (addition, subtraction, multiplication, division), and logic (OR and AND) operations.

Answer: A) Phishing scams

Explanation:

Attempts made by individuals to obtain confidential information from you by falsifying their identity are called Phishing scams. In Phishing attacks, the sender sends fraudulent communications that appear to come from a reputable source. This practice is usually done through email.

Answer: A) Tim Paterson

Explanation:

MS-DOS was created by Tim Paterson and introduced by Microsoft in August 1981; it was last updated in 1994 with the release of MS-DOS 6.22.

Answer: B) Operating System

Explanation:

During the booting process Operating System runs on a computer.

Answer: A) They are volatile

Explanation:

Cache and main memory will lose their contents when the power is off because they are volatile.

Answer: D) Vital Information Resources Under Siege

Explanation:

VIRUS stands for Vital Information Resources under Siege. It is a type of malicious software or malware that can cause to damage your data, files, and software.

Answer: A) Downloading

Explanation:

Downloading is a process of transferring files from the Internet to your computer.

Answer: B) Uploading

Explanation:

Uploading is a process of transferring files from your computer to the internet.

Answer: C) E-Commerce

Explanation:

Buying and selling products and services over the Internet is called E-Commerce. Sometimes, it is referred to as electronic commerce.

Answer: A) 1024 bytes

Explanation:

1 Kilobyte is equal to 1024 bytes.

Answer: D) Charles Babbage

Explanation:

Charles Babbage is known as the father of computer. He originated the concept of a digital programmable computer.

Answer: B) Blaise Pascal

Explanation:

Blaise Pascal invented the first mechanical calculator. He invented this device in the year 1642 when he was only at the age of 18.

Answer: C) M-Commerce

Explanation:

When you purchase a product over a Mobile Phone, the transaction is called M-Commerce. M-commerce, also called "mobile commerce," is the getting and selling of things and services using mobile devices like smartphones and tablets.

Answer: B) Input devices

Explanation:

An input device is a hardware device that is used to send data to a computer. Keyboard, Mouse, and Joystick are examples of input devices.

Answer: D) IP address

Explanation:

An address given to a computer connected to a network is called an IP address. IP stands for "Internet Protocol," which is a set of rules which make sure how data is sent over the internet or a local network.

Answer: C) Browser

Explanation:

Browser programs allow us to browse through web pages on the web server.

Answer: A) Lawrence J. Ellison

Explanation:

Lawrence J. Ellison is the founder of Oracle Corporation. He was an American billionaire business magnate and investor.

Answer: C) Optical

Explanation:

Optical technology is used in a CDROM Drive. An optical disc is used to store data that can be written to and read from using a low-powered laser beam.

Answer: A) Compiler

Explanation:

A compiler is a program that translates High-Level Language to Machine Level Language.

Answer: A) Debugging

Explanation:

The process to find errors in a software code is called debugging. The debugging process in software development starts when a developer successfully identifies a coding fault within a computer program and is able to replicate it.

Answer: C) Syntax

Explanation:

Syntax contains some set of rules and words that express the logical steps of an algorithm.

Answer: B) Clipboard

Explanation:

Data that is copied from an application is stored in Clipboard. It is a place where information from a computer file is stored for a short time until it is added to another file.

Answer: A) Multiprocessing

Explanation:

The simultaneous execution of two or more instructions is called multiprocessing. It is a process of running two or more programs or sequences of instructions simultaneously by a computer with more than one central processor.

Answer: D) Microprocessor

Explanation:

Microprocessors can understand the difference between data and programs.

Answer: A) Network

Explanation:

Servers are computers that provide resources to other computers connected to a network.

Answer: A) Application software

Explanation:

Excel spreadsheet, Powerpoint, and Word processing are examples of application software.

Answer: A) 1024 MB

Explanation:

1024 MB makes one GB (Giga Byte).

Answer: C) Information

Explanation:

Data that has been organized or presented in a meaningful way is called information. Information is processed data that has meaningful facts or insights.

Answer: C) 8 bits

Explanation:

In the binary language each letter of the alphabet, each number, and each special character is made up of a unique combination of 8 bits.

Answer: B) Microsoft

Explanation:

Windows operating system 'Windows 8' is the product of Microsoft Corporation.

Answer: A) Microprocessor

Explanation:

The term 'Pentium' is related to Microprocessor. A microprocessor is a processing device where the data processing logic and control are included on a single integrated circuit (IC), or a small number of ICs.

Answer: C) Programming languages

Explanation:

C, Java, PHP, and C++ are examples of programming languages. Software's developed using programming languages.

Answer: A) Ctrl + P

Explanation:

Ctrl + P is a shortcut key for printing a document in Windows.

Answer: D) Home Page

Explanation:

The home page is the main page of any website. Generally, it appears first on the website when visitors successfully load its URL (Uniform Resource Locator).

Answer: A) CPU

Explanation:

Central Processing Unit is often referred to as the "brain" of the computer and it is responsible for carrying out the instructions of the computer program within a system.

Answer: C) Digital computer

Explanation:

Digital computers represent data as discrete signals, which means that they are represented as a sequence of numbers.

Answer: D) Silico sapiens

Explanation:

"Silico sapiens" was coined by John R. Pierce. The term signifies that computer's ICs or integrated circuits are made of Silicon so that is one of the reasons for calling computer Silico sapiens.

Answer: B) Reverse video

Explanation:

"Reverse Video" is a feature that changes the colors of the highlighted screen area, making it stand out by using contrasting colors. This helps users notice important information or alerts easily.

Answer: C) Hybrid computer

Explanation:

Hybrid Computers combine both analog and digital features, allowing them to handle both measuring (analog) and counting (digital) tasks effectively.

Answer: A) Interpreter

Explanation:

The interpreter translates and executes a program line by line in real time, converting the source code into machine code and immediately executing each line without creating a separate executable file.

Answer: D) Ed Robert

Explanation:

Ed Robert created the Altair 8800 microcomputer kit in the mid-1970s. This computer kit was one of the first commercially successful personal computers.

Answer: D) Both A and B

Explanation:

They developed the Electronic Numerical Integrator and Computer (ENIAC) in the 1940s, often considered the first general-purpose electronic computer.

Answer: C) Assembly language

Explanation:

Assembly language is a low-level programming language that provides a direct correspondence between the instructions understood by the computer's hardware and the instructions written by the programmer.

Answer: A) World Wide Web

Explanation:

World Wide Web Developed by Sir Tim Berners-Lee in 1990, it was not only a web browser but also the first web editor and the first server.

Answer: A) International Business Machines

Explanation:

IBM is an abbreviation for "International Business Machines," reflecting the company's name and origin. It was founded on June 16, 1911.

Answer: B) Wide Area Network (WAN)

Explanation:

WAN is a technology that links far-apart office LANs over a big area, which works well for connecting distant office networks.

Answer: C) File Transfer

Explanation:

"File Transfer" refers to the process of copying a file from one computer to another through a communication channel, allowing data to be shared and accessed between different devices over a network or the internet.

Answer: A) Batch Processing

Explanation:

Batch processing involves collecting a large number of transactions or data items and then processing them together in a batch. This method helps in the efficient utilization of resources.

Answer: D) Magnetic Ink Character Recognition

Explanation:

MICR stands for Magnetic Ink Character Recognition, it describes the technology used for reading characters printed with magnetic ink on financial documents like checks.

Answer: B) 128

Explanation:

The ASCII (American Standard Code for Information Interchange) coding system employs a 7-bit binary code to represent a wide range of characters. With 7 bits, there are 2^7 (128) possible combinations.

Answer: D) Medium Scale Integrated Circuits

Explanation:

MSIC refers to integrated circuits that contain a moderate number of components, more than SSI (Small Scale Integration) but fewer than LSI (Large Scale Integration).

Answer: A) Encryption

Explanation:

Encryption is similar to scrambling a message into a secret code that only someone with the right key can unscramble. This keeps the information hidden from anyone who doesn't have the key.

Answer: B) Machine language

Explanation:

The earliest computers were programmed using machine code, which directly corresponds to the computer's hardware instructions.

Answer: A) Bug

Explanation:

A "bug" is a term commonly used in the realm of software development to denote a flaw or issue within a computer program that leads to its malfunction.

Answer: C) Shift button

Explanation:

The button that is typically used to switch between uppercase and lowercase letters, as well as numbers to symbols, is the "Shift" key on a keyboard. By holding down the "Shift" key and then pressing a letter key, you can type the uppercase version of that letter.

Answer: B) Power-On Self-Test (POST)

Explanation:

When a computer is powered on, the initial phase of the booting process involves a critical procedure known as the Power-On Self-Test (POST).

Answer: D) Dot per sq inch

Explanation:

Dot per sq inch is the standard unit of measurement used to assess the output quality of printers. It indicates the density of dots that a printer can produce per inch.

Answer: C) Very Large Scale Integration (VLSI)

Explanation:

VLSI refers to the technology of integrating a large number of transistors and other components onto a single microchip, enabling higher performance and greater computational power.

Answer: A) Processors

Explanation:

KIPS is indeed used to measure the speed of processors, specifically the speed at which a computer's central processing unit (CPU) can execute instructions.

Answer: D) Gaming

Explanation:

A joystick is primarily used for gaming. It provides analog control over movement and actions in video games, offering a more immersive experience compared to traditional keyboard or mouse controls.

Answer: B) E-mail virus

Explanation:

E-mail virus is spread through infected email attachments and caused significant disruptions by overloading email systems.

Answer: C) Ctrl + Alt + Delete

Explanation:

This keyboard shortcut is used to access various system options, including the ability to lock the computer, switch users, log out, change a password, open the Task Manager, and shut down or restart the computer.

Answer: A) Debugging

Explanation:

Debugging is the process of identifying and correcting errors or issues in a program's code. It involves finding and fixing bugs to ensure the program runs as intended.

Answer: B) Binary Coded Decimal

Explanation:

BCD stands for Binary Coded Decimal. It is a way of representing decimal numbers using binary encoding, where each decimal digit (0-9) is represented by a fixed number of binary digits.

Answer: C) Worn

Explanation:

A worm is a type of virus that uses computer hosts to reproduce itself. It spreads by exploiting vulnerabilities in networks or systems and can replicate without needing to attach to files.

Answer: A) Application

Explanation:

SMTP (Simple Mail Transfer Protocol), FTP (File Transfer Protocol), and DNS (Domain Name System) are applications that operate at the application layer of the OSI model.

Answer: B) Ctrl + A

Explanation:

The keyboard shortcut "Ctrl + A" is used to select the entire document or text within most applications. "Ctrl" stands for the Control key on the keyboard, and "A" represents "All."

Answer: B) Common Business-Oriented Language

Explanation:

COBOL stands for Common Business Oriented Language, which is a programming language primarily used for business, finance, and administrative systems.

Answer: D) Multitasking

Explanation:

Multitasking is the ability of an operating system to run more than one application simultaneously. It allows users to switch between different programs and tasks without having to close and reopen them.

Answer: D) F12

Explanation:

The F12 key is commonly used to display the "Save As" dialog box, allowing you to specify a new filename or location when saving a file.

Answer: A) Network Operating System

Explanation:

NOS stands for Network Operating System, which is specialized software designed to manage and coordinate network resources and services.

Answer: A) Analog Data

Explanation:

Analog data refers to information that is represented in a continuous and variable form. It can take on any value within a certain range. Examples of analog data include temperature readings, sound waves, and voltage levels.

Answer: C) Telephone Line

Explanation:

A modem is a device that connects digital devices, like computers, to communication networks. It's usually connected to a telephone line. It converts digital data from computers into analog signals for transmission over the line.

Answer: D) Hertz (Hz)

Explanation:

The refresh rate of a monitor is typically measured in Hertz (Hz), which indicates the number of times the screen is refreshed per second.

Answer: A) Vacuum Tubes and Valves

Explanation:

They were early electronic components used as switches and amplifiers in first-generation computers. They were the primary means of performing logical operations and calculations in these early computing machines.

Answer: C) Douglas Engelbart

Explanation:

Douglas Engelbart is often credited as the inventor of the computer mouse, among other contributions to human-computer interaction and computing technology.

Answer: A) Trojan Horse

Explanation:

A Trojan Horse is a type of malicious software that disguises itself as a legitimate program but contains harmful code that can perform destructive actions while appearing to serve a useful purpose.

Answer: B) Topology

Explanation:

The term topology refers to the geometric arrangement of devices on a network as "topology". It describes how devices are connected and organized within a network.

Answer: D) Information

Explanation:

The fundamental goal of a computer process is to convert data into meaningful information that can be processed, analyzed, and used for various purposes.

Answer: A) Motherboard

Explanation:

The motherboard is the central hub that connects the CPU, memory, storage devices, expansion cards, and other essential components, allowing them to work together to perform various tasks and operations.

Answer: C) Thomas J. Watson

Explanation:

Thomas J. Watson is known as the founder of IBM (International Business Machines) Corporation, which is a multinational technology and consulting company.

Answer: B) Pixels

Explanation:

An image on a computer screen is made up of pixels, which are tiny dots of color that come together to form the visual representation. These pixels form the images you see on your computer screen, phone, TV, or any other electronic display.

Answer: D) Metropolitan Area Network

Explanation:

MAN stands for Metropolitan Area Network, which is a network that spans a larger geographic area than a local area network (LAN) but is smaller than a wide area network (WAN).

Answer: C) UNDELETE

Explanation:

The UNDELETE command is a utility used to recover accidentally deleted files from storage media like hard drives, memory cards, or USB drives. It's typically provided by third-party file recovery software.

Answer: B) Compiler

Explanation:

A compiler is a computer program that translates an entire source code written in a high-level programming language into machine code or executable code all at once.

Answer: B) 1975

Explanation:

Microsoft Corporation was founded by Bill Gates and Paul Allen on April 4, 1975.

Answer: C) Windows

Explanation:

The Windows operating system is known for providing a graphic desktop environment, complete with icons, windows, menus, and graphical user interfaces (GUI) that make it user-friendly and visually organized.

Answer: A) Input Device

Explanation:

A light pen is an input device that allows users to interact with a computer screen by pointing at it and a joystick is an input device used for controlling the movement of objects or characters in computer games and simulations.

Answer: A) Nibble

Explanation:

A nibble is a unit of digital data that consists of four bits. It is half of a standard byte, which contains eight bits. Nibbles are often used in computing and data processing when dealing with groups of four bits at a time.

Answer: C) Switch Mode Power Supply

Explanation:

SMPS stands for Switch Mode Power Supply, which is a type of power supply unit used in computers and electronic devices to efficiently convert and regulate electrical power.

Answer: D) Formatting Toolbar

Explanation:

In Microsoft Word, the Formatting Toolbar provides options to change the appearance and positioning of text within a document, including font styles, alignment, indentation, and more.

Answer: B) Megabyte

Explanation:

A megabyte (MB) is a unit of digital information storage that represents approximately one million bytes. One megabyte is equivalent to 1,000 kilobytes (KB) or 1,000,000 bytes.

Answer: A) Printer

Explanation:

Daisy wheel, Drum, and Chain - are associated with various types of printers. These devices are components or mechanisms within printers that help generate printed text and images.

Answer: A) Extensible Markup Language

Explanation:

XML stands for Extensible Markup Language, which is a widely used format for structuring and storing data in a human-readable format that is also machine-readable.

Answer: B) Request-Response

Explanation:

The HTTP protocol operates on a request-response scheme, where clients send requests to servers for specific resources, and servers respond with the requested data.

Answer: C) Secondary Memory

Explanation:

A magnetic disk, such as a hard disk drive (HDD) or a solid-state drive (SSD), falls under the category of secondary memory or storage devices used to store data persistently in a computer system.

Answer: D) Open Systems Interconnection

Explanation:

OSI stands for Open Systems Interconnection, which refers to a conceptual framework used to standardize and understand how different networking protocols and technologies interact within a networked environment.

Answer: A) Primary

Explanation:

The BIOS (Basic Input/Output System) is stored in a chip on the motherboard and is a type of firmware that provides essential low-level functions for the computer's hardware. It is part of the computer's primary memory.

Answer: D) .xlsx

Explanation:

The ".xlsx" file extension refers to the file format used by Microsoft Excel for spreadsheets created with Excel 2007 and later versions. Files with the ".xlsx" extension contain data organized in rows and columns, formulas, charts, and other features commonly associated with spreadsheet applications.

Answer: A) Identity Theft

Explanation:

Identity theft involves the unauthorized collection of personal information with the intention of posing as another individual, often for financial gain or fraudulent activities.

Answer: C) Line Spacing

Explanation:

Line spacing refers to the amount of vertical space between lines of text in a document. It affects the readability and overall appearance of the text.

Answer: B) Operating System

Explanation:

A computer cannot initiate the 'boot' process without an operating system, as it is responsible for managing hardware, and software, and initiating the startup sequence.

Answer: D) PROM

Explanation:

PROM Stands for Programmable Read-Only Memory, It refers to a type of memory chip that can be programmed with specific data or instructions during manufacturing but cannot be changed afterward.

Answer: D) 680 MB

Explanation:

A typical data storage capacity of a normal CD-ROM is approximately 680 megabytes (MB).

Answer: B) Direct Memory Access

Explanation:

DMA stands for Direct Memory Access, which is a feature that allows hardware devices to communicate directly with computer memory without involving the central processing unit (CPU).

Answer: C) Local Area Network

Explanation:

In the context of Computer Network, LAN stands for Local Area Network, which is a network of interconnected devices within a limited geographic area, such as a home, office, or campus.

Answer: A) 1956 - 65

Explanation:

Second Generation computers were developed during the period of 1956 - 65.

Answer: B) 1991

Explanation:

In 1990, IBM and Apple Computers Inc. decided to join hands and collaborate on a new project known as "AIM" (Advanced Interactive Microelectronics). This partnership aimed to create a new generation of personal computer technology.

Answer: D) ROM

Explanation:

Read-Only Memory (ROM) is a type of memory that is both static (retains its contents without power) and non-volatile (retains its contents even when power is removed). It contains permanent instructions or data that cannot be modified after manufacturing.

Answer: A) Glitch

Explanation:

In computer jargon, an alternative term for an error in software or hardware is "glitch." It refers to a temporary or minor fault that can cause unexpected behavior or malfunctions in a system.

Answer: C) Spam

Explanation:

Unwanted repetitious messages, such as unsolicited bulk e-mails, are commonly referred to as spam.

Answer: D) Spoofing

Explanation:

Spoofing involves impersonating someone or something trusted to trick victims into taking actions that benefit the attacker's objectives.

Answer: A) Basic Input Output System

Explanation:

BIOS stands for Basic Input Output System, which is firmware that provides essential low-level functions for a computer's hardware, including booting the operating system and managing hardware components.

Answer: B) Dennis Ritchie

Explanation:

Dennis Ritchie is widely regarded as the creator and "Father of C Programming Language". He played a key role in developing the C programming language.

Answer: D) Waiting Room

Explanation:

"Waiting Room," fits well with the concept of RAM serving as a temporary storage area for data and instructions that the processor is currently working with.

Answer: A) Data Processing

Explanation:

Data Processing refers to the manipulation, transformation, and organization of data by a computer or other electronic device. It involves various operations such as calculations, sorting, and converting data from one format to another.

Answer: D) Virus

Explanation:

Joshy, Perfumes are examples of viruses.

Answer: C) Computer Forensics

Explanation:

Computer forensics is the law enforcement specialty that involves the ability to recover and analyze digital evidence, including deleted or damaged files, from a criminal's computer.

Answer: C) RAM (Main Memory)

Explanation:

RAM stands for Random Access Memory. It is a type of computer memory that provides the working space for the computer's operating system, applications, and data.

Answer: B) Start

Explanation:

The Help Menu in the Windows operating system is often accessed by clicking on the "Start" button and then selecting the "Help" option.

Answer: D) Master File

Explanation:

The master file contains permanent data and gets updated during the processing of transactions in a computer system, particularly in database management systems.

Answer: C) Optical Disc

Explanation:

An optical disc is a type of storage medium that uses optical technology to store and retrieve digital data. It consists of a flat, circular disc made of plastic or glass and is coated with a reflective layer.

Answer: D) Password Protection

Explanation:

Password protection is the most common tool used to restrict access to a computer system, or specific files. It involves setting up a password that users must provide to gain access, helping to secure sensitive information and prevent unauthorized access.

Answer: B) RISC

Explanation:

RISC stands for Reduced Instruction Set Computing. This architecture focuses on using a smaller set of essential and efficient instructions to enhance processor speed and performance.

Answer: C) Spybot

Explanation:

Spybot Search & Destroy is an anti-spyware software designed to detect and remove various types of malicious software, including spyware, adware, and other potentially unwanted programs.

Answer: B) Cell

Explanation:

A cell is an intersection of a row and a column. Each cell has its name like A2 which is also known as cell address.

Answer: A) Toolbar

Explanation:

A toolbar contains buttons and menus that provide quick access to commonly used commands. The toolbar is a visual interface that contains buttons, icons, and other components for displaying and receiving information on a computer screen.

Answer: B) Extensions

Explanation:

A file extension refers to a sequence of three or four alphabetic characters that is appended to the end of a file name. and follows a period like .doc, .xlsx, .pptx, .html. These extensions tell you about the characteristics of a file and its use.

Answer: D) Workbook file

Explanation:

Using Excel, we can create a workbook file. A workbook contains worksheets.

Answer: A) Automatic Teller Machine

Explanation:

ATM stands for Automatic Teller Machine.

Answer: C) Cursor

Explanation:

The blinking symbol on the computer screen is known as the cursor. A cursor looks like a vertical line that indicates the position on a computer’s screen where a user can enter text.

Answer: C) = MAX()

Explanation:

The `MAX()` Function finds the largest value amongst inputted numbers in Excel.

Answer: A) World Wide Web

Explanation:

'WWW' stands for World Wide Web. The Internet is an example of WWW.

Answer: C) Active Matrix Organic Light Emitting Diode

Explanation:

AMOLED stands for Active Matrix Organic Light Emitting Diode.

Answer: B) Google

Explanation:

Android mobile operating system is the product of Google.

Answer: A) Google

Explanation:

Gmail is a free email service provided by Google. This is one of the most popular emails.

Answer: D) Hyperlink

Explanation:

A pointer is shaped like a hand when it is positioned over a Hyperlink on the internet or an application.

Answer: B) Document files (.doc)

Explanation:

MS Word allows us to create document files.

Practice: MS Word MCQs

Answer: B) Workbook (.xlsx)

Explanation:

MS Excel allows us to create workbooks (.xlsx) documents by default.

Practice: MS Excel MCQs

Answer: A) Presentation files (.pptx)

Explanation:

MS-PowerPoint allows us to create Presentation file (.pptx) documents by default.

Practice: Microsoft PowerPoint MCQs

Answer: C) RAM (Random Access Memory)

Explanation:

While working on a computer; data are temporarily stored in the Random Access Memory.

Practice: Computer Memory MCQs

Answer: A) Buses

Explanation:

Using Buses, the information travels between different components on the Mother Board.

Answer: C) Cache memory

Explanation:

Cache memory is a small-sized type of volatile memory that accesses the data with high speed for a processor to execute. The most frequently used instructions of a computer program are likely to be fetched from Cache memory.

Answer: B) Blog

Explanation:

A blog is a website where someone writes regularly about things that interest them, generally with photos and links to other websites they find interesting.

Practice: Blogging MCQs

Answer: C) Open Source Operating System

Explanation:

Linux is an Open Source Operating System. An operating system is system software that directly controls hardware and other resources attached to the computer system.

Answer: A) Clipboards

Explanation:

Text or Graphics while copying is temporarily stored in Clipboards.

Answer: A) Landscape

Explanation:

Horizontal orientation of a page is referred to as Landscape in Page Setup.

Answer: C) Creating more free spaces

Explanation:

Defragmentation also known as defragging or defrag of Hard drive is done to create more free spaces. It is a process of rearranging the data on a storage medium.

Answer: A) Uniquely identify a record

Explanation:

The purpose of the primary key in a database is to uniquely identify a record from database tables.

Practice: DBMS Keys MCQs

Answer: A) Ctrl + C

Explanation:

Ctrl + C command is used to copy a text or file at a particular location.

Answer: B) Ctrl + V

Explanation:

Ctrl + V is used to paste a text or file at a particular location.

Answer: A) Hard Copy

Explanation:

Printed copy of a document is often called a Hard Copy.

Answer: D) Modulator

Explanation:

The device used to carry digital data on Analog lines is known as Modulator. A modulator is an electronic circuit that superimposes a low-frequency (information) signal onto a high-frequency (carrier) signal for the purpose of wireless transmission (source).

Answer: C) Cookies

Explanation:

Cookies are used to identify a user to get the details of accessibility on a website. Cookies contain text that a site you visit sends to your computer. They help the website remember the things about your visit, which can make it easier for you to go back to the site and make it more useful to you.

Answer: A) Interpreter

Explanation:

The program which translates and executes the program at run-time line by line is known as Interpreter.

Answer: D) File Transfer Protocol

Explanation:

FTP stands for File Transfer Protocol. FTP (File Transfer Protocol) is a standard network protocol used for the transfer of files from one host to another over a TCP-based network, such as the Internet (source).

Answer: A) Binary

Explanation:

Computers use the Binary Number System to store data and perform calculations.

Read: Computer Number Systems

Answer: D) Disk Operating System

Explanation:

DOS stands for Disk Operating System. DOS runs from a disk drive.

Answer: A) Modem

Explanation:

A modem is a device that converts a digital signal to an analog signal that can travel over telephone lines.

Answer: A) WAP (Wireless Application Protocol)

Explanation:

Wireless Application Protocol allows wireless mobile devices to access the Internet and its services. It is a standard for accessing information over a mobile wireless network.

Answer: D) Program

Explanation:

A group of instructions that directs a computer is called a program.

Answer: B) Simulator

Explanation:

A computer-controlled device for training exercises that duplicates the work environment is called Simulator.

Answer: C) Paper tape

Explanation:

Perforated paper used as input or output media is known as paper tape. The paper tape consisted of a lengthy strand of paper punched with holes to hold data. Typically, paper tape measured 0.1 mm.

Answer: C) Bus topology

Explanation:

Ethernet uses Bus topology. It is a specific type of network topology in which different devices in the network are connected to a single cable.

Answer: B) Second-Generation Computer

Explanation:

IBM 1401 is a Second Generation Computer. IBM announced the IBM 1401, a variable-word length decimal computer, on October 5, 1959.

Answer: B) IBM (International Business Machine)

Explanation:

The personal computer industry was started by IBM (International Business Machine).

Answer: C) IBM 650

Explanation:

IBM 1650 was the most popular first-generation computer. The IBM 650 Magnetic Drum Data-Processing Machine was the world's first mass-produced computer and one of IBM's earliest computers.

Answer: A) To compare numbers

Explanation:

The responsibility of the logical unit in the CPU of a computer is to compare numbers.