All Free Computer Science and IT MCQs with Answers

• A. Win + Pause
• B. Win + Insert
• C. Wind + End
• D. Win + Tab

Explanation: Windows key + Pause opens the System or computer properties window in traditional Windows versions.

• A. Win + C
• B. Win + D
• C. Win + E
• D. Win + F

Explanation: Windows key + E opens File Explorer, traditionally called My Computer or Windows Explorer.

• A. Ctrl + Esc
• B. WIN + Ctrl + Esc
• C. Alt + Esc
• D. Ctrl + Shift + Esc

Explanation: Ctrl+Shift+Esc opens Windows Task Manager directly, while Ctrl+Alt+Delete opens a security screen from which Task Manager can also be…

• A. Ctrl + Esc
• B. WIN+ Esc
• C. Alt + Esc
• D. Shift + Esc

Explanation: Ctrl+Esc opens the Windows Start menu, which is what the question calls the startup button.

• A. Command line interface (CLI)
• B. Graphical user interface (GUI)
• C. Touchscreen interface
• D. Drop down menu interface

Explanation: A command-line interface accepts typed commands and returns text-based results.

• A. CPU
• B. ALU
• C. Register
• D. None of these

Explanation: The CPU controls and coordinates the computer's operations by fetching and executing instructions.

• A. Second generation
• B. Third generation
• C. Fourth generation
• D. Fifth generation

Explanation: The fourth generation began with the microprocessor, which placed the CPU on a single integrated circuit.

• A. Programming Intelligence
• B. Artificial Intelligence
• C. System Knowledge
• D. None of these

Explanation: Fifth-generation computers are associated with artificial intelligence, including natural-language processing and knowledge-based systems.

• A. Function
• B. Modifier
• C. Control
• D. None of the above

Explanation: F1 through F12 are function keys because their actions depend on the software being used.

• A. Modifier
• B. Function
• C. Numeric
• D. Alphanumeric

Explanation: Ctrl, Shift, Alt and the Windows key modify the action of another key or key combination, so they are called modifier keys.

• A. RAM
• B. ROM
• C. Static RAM
• D. Cache memory

Explanation: Cache memory is a high-speed buffer between the CPU and main memory, storing frequently needed data and instructions.

• A. Physical Machine
• B. Electronic Machine
• C. Chemical Machine
• D. Mechanical Machine

Explanation: A computer is an electronic machine that accepts data, processes it, stores it, and produces information.

• A. 1 million bytes
• B. 1 trillion bytes
• C. 1 billion bytes
• D. None

Explanation: In the decimal storage convention commonly used in such MCQs, 1 GB equals 1 billion bytes.

• A. Intel 8008
• B. Intel 8080
• C. Intel 4004
• D. Motorola 6809

Explanation: Intel 4004, released in 1971, is generally recognized as the first commercially available microprocessor.

• A. Entered at different locations where it originates
• B. Sent to different locations from a central place
• C. Accessed from different places know as distribution points
• D. Distributed through a network

Explanation: Distributed data entry means entering data at the locations where it is generated or collected, rather than sending all source data to one…

• A. Along technology
• B. Hybrid technology
• C. Digital technology
• D. none of the above

Explanation: Modern general-purpose computers process information using discrete binary values, so they are based on digital technology.

• A. Coded
• B. Memorised
• C. Analysed
• D. Reduced to a series of logical steps

Explanation: A computer can perform a task when that task can be expressed as a finite series of logical steps, or an algorithm.

• A. each process is blocked and will remain so forever
• B. each process is terminated
• C. all processes are trying to kill each other
• D. None of these

Explanation: Deadlock occurs when processes are permanently blocked because each is waiting for a resource held by another process in the set.

• A. Vector
• B. Raster
• C. Master
• D. both A & B

Explanation: The two basic categories of computer graphics are raster images, made from pixels, and vector images, defined by lines and mathematical…

• A. Lines
• B. Dots
• C. Scratches
• D. Lightings

Explanation: A digital raster picture is built from tiny dots called pixels, with each pixel storing colour information.