Which of the following units is the largest in terms of data storage capacity? MCQ with Answer and Explanation

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Which of the following units is the largest in terms of data storage capacity?

A. Terabyte (TB)

B. Exabyte (EB)

C. Petabyte (PB)

D. Yottabyte (YB)

Answer: Option D

Solution (By JKSSB Mock Tests)

Among the options, Yottabyte (YB) is the largest. The order is Terabyte < Petabyte < Exabyte < Yottabyte.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What does the term 'seek time' refer to in a hard disk drive?

A. Time to transfer data to the computer

B. Time to rotate the disk

C. Time to move the head to the correct track

D. Time to read data from the sector

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Correct Answer: Option C

Explanation:
Seek time is the time taken for the read/write head to move to the correct track (cylinder) on the platter where the data is stored.

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the function of a page table in virtual memory?

A. To allocate memory to processes

B. To map virtual pages to physical frames

C. To manage disk I/O

D. To store the contents of cache

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Correct Answer: Option B

Explanation:
A page table is a data structure used by the MMU to translate virtual addresses to physical addresses, mapping pages to frames.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which of the following is an advantage of optical storage over magnetic storage?

A. Higher capacity

B. More durable (resistant to magnetic fields)

C. Faster read/write speeds

D. Lower cost per GB

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Correct Answer: Option B

Explanation:
Optical discs are immune to magnetic fields and are relatively durable under normal handling, while magnetic disks can be damaged by strong magnetic fields. However, optical is slower and lower capacity.

This question belongs to: Computer Memory and Storage Devices

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