All Free Computer Science and IT MCQs with Answers

• A. Permanent storage
• B. Volatile memory
• C. Read-only memory
• D. Optical storage

Explanation: RAM (Random Access Memory) is volatile — its contents are lost when power is switched off.

• A. Copy
• B. Cut
• C. Paste
• D. Undo

Explanation: Ctrl + V pastes the clipboard contents. Ctrl + C copies, Ctrl + X cuts and Ctrl + Z undoes — this cluster of four shortcuts is standard in…

• A. HyperText Transfer Protocol
• B. High Transfer Text Protocol
• C. HyperText Transmission Process
• D. Host Transfer Text Protocol

Explanation: HTTP is the HyperText Transfer Protocol, the application-layer protocol used to transfer web pages.

• A. Stores the largest value in the table
• B. Uniquely identifies each record in a table
• C. Links two databases together
• D. Encrypts the contents of a table

Explanation: A primary key uniquely identifies every record in a table and cannot contain duplicate or null values.

• A. Classic Babbage
• B. John McCarthy
• C. Alan Turing
• D. None of these

Explanation: John McCarthy coined the term artificial intelligence in 1956 and helped establish AI as an academic field.

• A. clock
• B. nerve center
• C. main memory
• D. all of them

Explanation: The control unit directs and coordinates the operations of the computer, so it is often called the nerve centre.

• A. Charles Babbage
• B. Ada Lovelace
• C. Alan Turing
• D. Douglas Engellbert

Explanation: Douglas Engelbart developed the early computer mouse, which is a pointing device.

• A. Mother of Calculation
• B. Mother of Monitor
• C. Mother of Computer
• D. None

Explanation: Ada Lovelace is widely called the mother of computer programming, so Mother of Computer is the intended option.

• A. Super computer is much larger than mainframe computers
• B. Super computers are much smaller than mainframe computers
• C. Supercomputers are focused to execute few programs as fast as possible while mainframe uses its power to execute as many programs concurrently
• D. Supercomputers are focused to execute as many programs as possible while mainframe uses its power to execute few programs as fast as possible.Fun & Trivia

Explanation: Supercomputers are optimized for extremely rapid execution of specialized calculations, while mainframes emphasize reliable processing of…

• A. Medium Scale Integrated Circuits
• B. Medium System Integrated Circuits
• C. Medium Scale Intelligent Circuit
• D. Medium System Intelligent Circuit

Explanation: MSI stands for Medium-Scale Integration, referring to integrated circuits containing more components than SSI but fewer than LSI circuits.

• A. Arithmetic Logic Unit
• B. Array Logic Unit
• C. Application Logic Unit
• D. None of above

Explanation: The ALU is the Arithmetic Logic Unit, the CPU component that performs arithmetic operations and logical comparisons.

• A. Analog computer
• B. Digital computer
• C. Hybrid computer
• D. Mainframe computer

Explanation: A hybrid computer combines analog processing, useful for continuous physical values, with digital processing, useful for discrete data and…

• A. Continuous electrical pulses
• B. Electrical pulses but not continuous
• C. Magnetic strength
• D. None of the above

Explanation: An analog computer processes continuously varying physical quantities, commonly represented by continuous electrical signals.

• A. Digital Clock
• B. Automobile analog speed meter
• C. Clock with a dial and two hands
• D. All of them

Explanation: A digital clock displays time as discrete numerical values, so it is a digital device.

• A. ALU
• B. Memory
• C. CPU
• D. Control unit

Explanation: The CPU is called the computer's brain because it interprets and executes instructions and coordinates other components.

• A. 1024 bits
• B. 1032 megabytes
• C. 1024 kilobytes
• D. 1024 megabytes

Explanation: Using the common binary memory convention, 1 gigabyte equals 1024 megabytes, and each megabyte contains 1024 kilobytes.

• A. Uni-process
• B. Multiprocessor
• C. Multi-threaded
• D. Multi-programming

Explanation: A computer containing two or more processors is called a multiprocessor system.

• A. Arithmetic operation
• B. Logical operation
• C. Storage and relative
• D. All the above

Explanation: Computers perform arithmetic and logical processing and also store and retrieve data.

• A. Allen Turing
• B. Charles Babbage
• C. Simur Cray
• D. Augusta Adaming

Explanation: Charles Babbage is called the father of the computer because his Analytical Engine introduced many ideas used in modern general-purpose…

• A. Latin
• B. German
• C. French
• D. Arabic

Explanation: The word computer comes from the Latin computare, meaning to calculate or reckon.