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MCQ Practice

Computer & IT MCQs

What is the command used to erase all the data on the hard drive (Storage)?

  • A. Delete
  • B. Remove
  • C. Erase
  • D. Format
Explanation:
The Format command erases all data on a storage device.

Which technology is used in compact discs?

  • A. Mechanical
  • B. Electrical
  • C. Electro Magnetic
  • D. Laser
Explanation:
Laser technology is used to read and write data on compact discs.

A compact disc that can be written, read many times, erased, and written again is called ____.

  • A. CD-ROM
  • B. CD-RW
  • C. CDO
  • D. CAD
Explanation:
CD-RW is a rewritable compact disc.

Blank DVDs on which data can be erased and rewritten are identified as ____.

  • A. DVD + WR
  • B. DVD + RW
  • C. DVD + R
  • D. DVD + W
Explanation:
DVD+RW discs are rewritable.

Standard single layer double sided DVD can store maximum of ____.

  • A. 5.5
  • B. 6.7
  • C. 9.4
  • D. 7.7
Explanation:
A double-sided, single-layer DVD can store up to 9.4 GB.

How much data can a single-layer, single-sided DVD store?

  • A. 4.7 GB
  • B. 14.7 GB
  • C. 24.7 GB
  • D. 34.7 GB
Explanation:
A single-layer, single-sided DVD stores 4.7 GB.

What is the storage capacity of a CD-ROM?

  • A. 680 MB
  • B. 650 MB
  • C. 800 MB
  • D. 1000 MB
Explanation:
Standard CD-ROM capacity is approximately 680–700 MB.

An optical disk is an electronic data storage medium that can be written and read from using a ____.

  • A. Low-power laser beam
  • B. High-power laser beam
  • C. Strong power laser beam
  • D. All of these
Explanation:
Optical disks use a low-power laser beam for reading/writing.

Which is the cheapest memory device?

  • A. Magnetic disk
  • B. Flash
  • C. Compact Disk
  • D. Magnetic Tape
Explanation:
Compact Disk (CD) is one of the cheapest storage media.

In a compact disc, which technology is used to store data?

  • A. Magnetic strip
  • B. Laser
  • C. Microchip
  • D. Photocell
Explanation:
Compact discs use laser technology to read and write data.