MCQ Practice

Computer & IT MCQs

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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.

Practice Important Questions

This section provides important MCQs with answers and explanations to help candidates prepare effectively for CSS, PMS, and other competitive exams.

Improve Conceptual Understanding

Each MCQ is designed to strengthen your understanding of key concepts and improve analytical thinking required in exams.

Exam-Oriented Preparation

These MCQs follow actual exam patterns, helping aspirants practice relevant questions and improve performance.

Useful for CSS and PMS Exams

This collection is highly beneficial for CSS, PMS, and other competitive exams, improving accuracy and confidence.