All Free Computer Science and IT MCQs with Answers

381. HDD stands for

• A. High Density Disk
• B. Heavy Duty Diesel
• C. Heating Degree Days
• D. Hard Disk Drive

Explanation: HDD means Hard Disk Drive, a magnetic storage device that stores data on rotating platters. It is distinct from an SSD, which uses flash memory and has no moving platters.

382. SATA stands for

• A. Student Athletic Training Association
• B. Specialized Assault Tactical Androids
• C. Serial Advanced Technology Attachment
• D. Student Air Travel Association

Explanation: SATA means Serial Advanced Technology Attachment, a standard interface used to connect storage devices such as hard drives and optical drives to a computer.

383. Printer is an ________________.

• A. Input device
• B. Software
• C. Output device
• D. None of above

Explanation: A printer produces a paper or electronic representation of processed information, so it is an output device. Input devices send data into the computer, whereas a printer receives data from it.

384. DMA stands for

• A. Direct Module Access
• B. Distinct Module Access
• C. Direct Memory Access
• D. Direct Memory Allocation

Explanation: DMA stands for Direct Memory Access, allowing an input/output device to transfer data directly to or from memory with limited processor involvement.

385. HDMI stands for

• A. High-Definition Multimedia Input
• B. High-Density Multichip Interconnect
• C. High-Definition Multimedia Interface
• D. High-Definition Multichip Interconnect

Explanation: HDMI means High-Definition Multimedia Interface. It carries digital audio and video through one interface, unlike the distractors that use Input, Density, or Multichip.

386. Which technology provides a solution for PC virtualization?

• A. Hyper-Visor
• B. Server Clustering
• C. Terminal Services
• D. RAID

Explanation: A hypervisor creates and manages virtual machines, allowing multiple virtual computers to run on one physical PC. Server clustering, terminal services, and RAID provide different capabilities and do not themselves perform PC virtualization.

387. DVD Stands For:__________?

• A. Digital Versatile Disk
• B. Digital Versatile Drive
• C. Digital volume disk
• D. Digital Video drive

Explanation: DVD is conventionally expanded as Digital Versatile Disc, although many basic computer texts use the spelling Digital Versatile Disk. Option a is the intended expansion; it refers to optical storage, not a drive.

388. OCR stands for____________?

• A. Output Character Recorder
• B. Output Character Recognition
• C. Optical Character Recorder
• D. Optical Character Recognition

Explanation: OCR means Optical Character Recognition, a technology that converts scanned or photographed text into machine-readable characters. The terms output and recorder do not describe this process.

389. Disk and tape drives are commonly used?

• A. Hard copy
• B. Soft copy
• C. Secondary storage devices
• D. none of the above

Explanation: Disk and tape drives store data for long-term use and are therefore secondary storage devices. Hard copy is printed output, while soft copy is electronically displayed or stored information.

390. Handheld computer is also called__________?

• A. Palmtop computer
• B. Laptop computer
• C. Notebook computer
• D. None of these

Explanation: A palmtop is a small handheld computer designed to fit in the palm of the hand. Laptops and notebooks are portable, but they are larger and not normally classified as handheld computers.