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MCQ Practice

Computer & IT MCQs

What does DMA stand for?

  • A. Distinct Memory Access
  • B. Direct Memory Access
  • C. Dual Memory Access
  • D. None of these
Explanation:
DMA stands for Direct Memory Access, allowing devices to access memory without CPU involvement.

Latency time is ____.

  • A. Time to spin data under the sector
  • B. Time to spin the needed data under track
  • C. Time to spin the needed data under the head
  • D. All of these
Explanation:
Latency (rotational delay) is the time for the disk to spin the required data under the read/write head.

Seek time is ____.

  • A. Time to position the head over the proper sector
  • B. Time to position the head over the proper track
  • C. Time to position the head over the proper cylinder
  • D. None of these
Explanation:
Seek time is the time taken by the read/write head to move to the correct sector.

Information on a hard disk is usually backed up using a?

  • A. CD-ROM
  • B. Magnetic tape
  • C. Floppy disk
  • D. All of these
Explanation:
CD-ROM (and other optical media) is a common backup medium.

In computer disk storage is a subdivision on a magnetic disk or optical disk called ____.

  • A. Track
  • B. ROM
  • C. Sector
  • D. None of these
Explanation:
A sector is the smallest subdivision of a disk for storing data.

A hard disk becomes totally inaccessible when a computer virus corrupts its ____.

  • A. Boot Sector
  • B. Partition table
  • C. File Allocation Table
  • D. None of these
Explanation:
Corruption of the File Allocation Table makes the hard disk inaccessible.

The circular device used for storage is ____.

  • A. Motherboard
  • B. Disk
  • C. RAM
  • D. ROM
Explanation:
Magnetic/optical disks are circular storage devices.

Which of the following devices is used to store data permanently?

  • A. Hard Disk
  • B. Printer
  • C. Cache
  • D. RAM
Explanation:
A hard disk is non-volatile and stores data permanently even without power.

Which devices are used to back up data?

  • A. Hard disk
  • B. Floppy
  • C. CD
  • D. All of these
Explanation:
Hard disks, floppies, and CDs are all commonly used for data backup.

A computer device can read and write from which?

  • A. Hard disk
  • B. RAM
  • C. Flash drive
  • D. All of these
Explanation:
Hard disk, RAM, and flash drives all support both read and write operations.