Free Computer Fundamentals MCQs with Answers

41. Which shortcut key used to open startup button in windows 10?

• 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. The Windows key is the usual direct shortcut, but it is not listed among the options.

42. Which of these is the name of a type of interface that allows a user to type in commands on a keyboard which gives the computer instructions?

• 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 GUI instead uses visual elements such as windows, icons and menus.

43. The unit that controls all parts of the computer is __________?

• 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. The ALU performs arithmetic and logical operations, so it is only one part of the CPU.

44. Microprocessor was introduced in which generation of computer?

• 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. Earlier generations used transistors or larger integrated circuits rather than microprocessors.

45. Fifth generation computers are based on:____________?

• 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. The other options are not the standard basis used to define this generation.

46. F1 through F 12 are called_________keys.

• 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. Modifier keys such as Ctrl and Shift change the effect of another key instead.

47. Ctrl, Shift, Alt and windows are called__________keys.

• 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. They are not function or alphanumeric keys.

48. Which memory acts as a buffer Between CPU and the main memory ?

• 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. RAM and ROM are types of memory, but they do not specifically serve this CPU buffer role.

49. Computer is a _______________?

• 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. Physical describes its hardware form but not the technology on which it operates.

50. 1GB is equal to______ bytes?

• 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. In binary terminology, 1 GiB equals 1,073,741,824 bytes, which is why the unit distinction matters.