All Free Computer Science and IT MCQs with Answers

361. Keyboard used with personal Computer have___________keys?

• A. 84 to 85 keys
• B. 101 to 105 keys
• C. both a & b
• D. none of these

Explanation: Most modern personal-computer keyboards follow the 101-to-105-key layout, depending on the platform and extra keys included. The 84-to-85-key range refers mainly to older keyboard designs.

362. The________is firmware that contain a computer's startup instruction.

• A. POST
• B. BIOS
• C. CMOS
• D. DIOS

Explanation: BIOS is firmware stored on the motherboard that performs initial hardware checks and provides the instructions needed to start the computer. POST is the check it performs, while CMOS traditionally stores configuration settings.

363. Which key is between the Ctrl and Alt keys?

• A. Shift
• B. Enter
• C. Window
• D. Space bar

Explanation: The Windows key is normally positioned between the left Ctrl and Alt keys and opens the Start menu or supports Windows keyboard shortcuts. Enter and Shift are elsewhere, while the space bar is below them.

364. ALU stands for ________?

• A. Arithmetic Longest Unit
• B. Arithmetic Logic Unit
• C. Arithmetic Longest United
• D. None of these

Explanation: ALU means Arithmetic Logic Unit, the CPU component that performs arithmetic calculations and logical comparisons. The other expansions do not describe a standard computer component.

365. WMA stands for _________?

• A. Windows Medium Audio
• B. Windows Media Video
• C. Windows Media Audio
• D. Windows Medium Video

Explanation: WMA means Windows Media Audio, an audio compression and file format developed by Microsoft. Windows Media Video is represented by WMV, not WMA.

366. CPU is an example of ______?

• A. Software
• B. A program
• C. An output unit
• D. Hardware

Explanation: The CPU is a physical electronic component that executes instructions, so it is hardware. Software consists of the programs and instructions processed by the CPU.

367. Dot-matrix is a type of?

• A. Printer
• B. Disk
• C. Tape
• D. Bus

Explanation: A dot-matrix printer forms characters and images from a pattern of tiny dots made by pins striking an ink ribbon. Disk, tape, and bus are storage or data-transfer terms, not printer types.

368. Which of the following color graphics display has the highest resolution?

• A. HCA
• B. EGA
• C. CGA
• D. VGA

Explanation: VGA provides a higher-resolution color display than CGA and EGA among the listed standard adapters. HCA is not the usual standard color-graphics choice in this comparison.

369. The hardware parts of computer are _______?

• A. Firmware components
• B. Physical components
• C. Logical components
• D. All of these

Explanation: Hardware means the tangible parts of a computer, such as the keyboard, processor, monitor, and memory chips. Firmware and logical components are software-related concepts, not the definition of hardware.

370. CRT stands for ______?

• A. Crystal Ray Tube
• B. Cathode Ray Tube
• C. Cabin Ray Tube
• D. Carbon Ray Tube

Explanation: CRT means Cathode Ray Tube, the vacuum-tube display technology used in older monitors and televisions. Cathode-ray electrons strike a phosphor screen to produce the image.