All Free Computer Science and IT MCQs with Answers

311. Which is the type of port?

• A. Serial
• B. Parallel
• C. AGP
• D. All of these

Explanation: Serial and parallel are types of ports, while AGP is a graphics expansion port used for a graphics card. Therefore, all three listed items are port types.

312. In banks, data check on the cheques is read by the following device:

• A. OCR
• B. OMR
• C. MICR
• D. None of these

Explanation: MICR reads the magnetic-ink characters printed on bank cheques, especially the account and routing information. OCR reads ordinary printed text, while OMR detects marked areas on forms.

313. The Video Graphics Array (VGA) resolution standard is__________?

• A. 640×480B
• B. 800×600
• C. 1024×768
• D. 1280×3024

Explanation: The original VGA standard uses a resolution of 640 × 480 pixels. Resolutions such as 800 × 600 and 1024 × 768 are higher display standards, not the original VGA resolution.

314. Diameter of Compact Disk is ________?

• A. 10 cm
• B. 11 cm
• C. 12 cm
• D. None of these

Explanation: A standard compact disc has a diameter of 12 cm, or approximately 4.7 inches. The 12-cm disc is the normal full-size CD, while smaller mini-CDs are different formats.

315. What type of software is a "printer driver"?

• A. Application Software
• B. System Software
• C. Utility Software
• D. None of Above

Explanation: A printer driver is system software because it enables the operating system to communicate with and control printer hardware. It is not an end-user application such as a word processor.

316. Mac OS offers _____________ for data backup.

• A. File history
• B. Time Machine
• C. File backup
• D. None of above

Explanation: Time Machine is macOS's built-in backup and recovery feature, allowing users to save versions of files and restore them later. File History is associated mainly with Windows.

317. What is Heuristic checking?

• A. False positive
• B. Data storage
• C. Virus scanning
• D. Virus removing

Explanation: Heuristic checking is a method used by antivirus software to identify suspicious or previously unknown malware based on behavior or characteristics. It is therefore part of virus scanning, not the physical removal process.

318. The BIOS settings are stored in _________ ?

• A. EEPROM
• B. CMOS chip
• C. Memory
• D. OS

Explanation: Traditional PCs store BIOS configuration settings in battery-backed CMOS memory, commonly called the CMOS chip. Modern systems may use flash or EEPROM for firmware, but the conventional MCQ answer for BIOS settings is CMOS.

319. Hard disk drives are considered _________ storage.

• A. flash
• B. nonvolatile
• C. nonpermanent
• D. temporary

Explanation: Hard disk drives retain data when power is removed, so they are nonvolatile storage. Temporary storage, such as RAM, loses its contents when the computer is turned off.

320. Driver of computer Hardware are:__________?

• A. Application Software
• B. Utility Programme
• C. System software
• D. Productivity software

Explanation: Device drivers are system software that allow the operating system to communicate with and control hardware devices. Application and productivity software serve user tasks rather than directly managing hardware.