MCQ Practice

Computer & IT MCQs

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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.

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.