Computer Basics – MCQs
Computer GK Questions & Answers
1. What is the full form of WWW ?
Ans: World Wide Web
Explanation: WWW is a system of interconnected web pages and resources that can be accessed through the Internet using a web browser.
2. Who invented the World Wide Web ?
Ans: Tim Berners-Lee
Explanation: Sir Tim Berners-Lee invented the World Wide Web in 1989 while working at CERN. The first website went live in 1991.
3. Which device is used to print documents ?
Ans: Printer
Explanation:: A printer is an output device that produces text, images, or documents on paper. The printed copy is called a hard copy.
4. What is the smallest unit of data in a computer ?
Ans: Bit
Explanation:: A bit is the smallest unit of digital data. It can have only two possible values: 0 or 1.
5. How many bits are there in one byte ?
Ans: 8 bits
Explanation:: 1 Byte = 8 Bits. A byte is commonly used to represent a small amount of computer data, such as a character.
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Q1. Which memory is volatile and loses data when power is turned off ?
(A) ROM (B) EEPROM (C) RAM (D) SSD
Ans: (C) RAM
Explanation: RAM (Random Access Memory) is volatile memory, meaning its stored data is lost when the computer is switched off.
Q2. Which of the following converts high-level language into machine language line by line ?
(A) Compiler (B) Assembler (C) Interpreter (D) Debugger
Ans: (C) Interpreter
Explanation: An interpreter translates and executes a high-level program one line at a time. A compiler generally translates the whole program before execution.
Q3. What is the primary function of cache memory in a computer system ?
(A) Store permanent files (B) Increase CPU speed by storing frequently used data (C) Replace RAM (D) Backup operating system
Ans: (B) Increase CPU speed by storing frequently used data
Explanation: Cache is a small, high-speed memory located close to the CPU. It stores frequently accessed data and instructions so the CPU can access them faster.
Q4. Which protocol is mainly used for secure web browsing?
(A) HTTP (B) FTP (C) HTTPS (D) SMTP
Ans: (C) HTTPS
Explanation: HTTPS (HyperText Transfer Protocol Secure) encrypts communication between a user's browser and a website, helping protect data from interception.
Q5. Which part of CPU performs arithmetic and logical operations?
(A) CU (Control Unit) (B) ALU (Arithmetic Logic Unit) (C) RAM (D) GPU
Ans: (B) ALU
Explanation: The ALU performs arithmetic operations such as addition and subtraction and logical operations such as comparison.
Q6. Which of the following storage devices has the fastest access speed?
(A) HDD (B) DVD (C) SSD (D) USB Flash Drive
Ans: (C) SSD
Explanation: An SSD (Solid State Drive) uses flash memory and has much faster access and data-transfer speeds than traditional HDDs.
Q7. What is the binary equivalent of decimal number 25 ?
(A) 10011 (B) 11001 (C) 10110 (D) 11100
Ans: (B) 11001
Explanation:
Therefore, 2510=110012
Q8. Which type of software manages hardware resources and provides services to programs ?
(A) Application Software (B) Utility Software (C) Operating System (D) Antivirus Software
Ans: (C) Operating System
Explanation: An Operating System (OS) manages hardware such as the CPU, memory and storage and provides a platform for application programs.
Q9. In networking, what does LAN stand for ?
(A) Large Area Network (B) Local Area Network (C) Limited Access Network (D) Logical Area Network
Ans: (B) Local Area Network
Explanation: LAN stands for Local Area Network. It connects computers and other devices within a limited geographical area, such as a home, school or office.
Q10. Which of the following is an example of both an input and output device ?
(A) Printer (B) Monitor (C) Touchscreen (D) Scanner
Ans: (C) Touchscreen
Explanation: A touchscreen works as both:
- Input: It detects the user's touch.
- Output: It displays text, images and other information.