What is the function of a memory scrubber? MCQ with Answer and Explanation

What is the function of a memory scrubber?
A. To erase memory contents
B. To increase memory speed
C. To correct errors in memory by reading and rewriting data
D. To clean dust from memory modules
Answer: Option C
Solution (By JKSSB Mock Tests)
A memory scrubber is a background process that reads memory locations and corrects errors (using ECC) to prevent accumulation of errors.

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Practice More Memory and Storage Devices Questions

Question #1
What is the typical capacity of a DVD-R DL (dual layer) disc?
A. 8.5 GB
B. 9.4 GB
C. 17 GB
D. 4.7 GB

Correct Answer: Option A


Explanation:
DVD-R DL (dual layer) has a capacity of 8.5 GB. Double-sided dual layer would be larger.

This question belongs to: Computer Memory and Storage Devices
Question #2
Which specific optical storage standard uses a shorter wavelength blue-violet laser to read and write data, allowing for significantly higher data density?
A. Magnetic Tape
B. Blu-ray Disc
C. DVD-R
D. CD-ROM

Correct Answer: Option B


Explanation:
Blu-ray discs use a 405nm blue-violet laser, which has a shorter wavelength than the red lasers used in DVDs and CDs, allowing it to focus on smaller pits and pack more data.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the typical capacity of a CD-R disc in terms of audio minutes?
A. 80 minutes
B. 60 minutes
C. 74 minutes
D. 90 minutes

Correct Answer: Option A


Explanation:
Standard CD-R can hold 80 minutes of audio (700 MB). Some older ones hold 74 minutes (650 MB).

This question belongs to: Computer Memory and Storage Devices