In the context of memory, what does 'volatile' mean? MCQ with Answer and Explanation

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In the context of memory, what does 'volatile' mean?

A. Memory requires power to retain data

B. Memory cannot be written

C. Memory is permanent

D. Memory retains data without power

Answer: Option A

Solution (By JKSSB Mock Tests)

Volatile memory loses its stored data when the power supply is turned off. RAM is a classic example of volatile memory.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What is the typical speed of a hard disk's interface SATA III in Gbps?

A. 6 Gbps

B. 12 Gbps

C. 16 Gbps

D. 3 Gbps

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Correct Answer: Option A

Explanation:
SATA III (SATA 6G) has a maximum data rate of 6 Gbps. SATA II is 3 Gbps, SATA I is 1.5 Gbps.

This question belongs to: Computer Memory and Storage Devices

Question #2

Which of the following storage devices has the fastest data access time?

A. Magnetic tape

B. Hard disk

C. Solid-state drive (SSD)

D. DVD-ROM

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Correct Answer: Option C

Explanation:
SSDs have much lower access times than HDDs and optical discs because they have no moving parts and use flash memory. Magnetic tape is slower for random access.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which physical attribute limits the maximum total storage volume capacity of a standard optical disc?

A. The rotational speed of the spindle electric motor.

B. The track pitch distance and the wavelength of the reading laser beam.

C. The type of plastic used in the outer tray assembly.

D. The physical thickness of the label paper.

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Correct Answer: Option B

Explanation:
Optical data capacity depends on how tightly tracks can be spaced (track pitch) and how small the laser's focal point can be, which is determined by the laser's wavelength.

This question belongs to: Computer Memory and Storage Devices

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