When a computer is turned off, the contents of which component are completely lost? MCQ with Answer and Explanation

When a computer is turned off, the contents of which component are completely lost?
A. Hard Disk Drive
B. SSD
C. ROM
D. RAM
Answer: Option D
Solution (By JKSSB Mock Tests)
RAM is volatile memory; it requires an active electrical current to maintain stored data, which is wiped when power is removed.

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Practice More Memory and Storage Devices Questions

Question #1
The term 'Hit Ratio' is most frequently evaluated in the performance assessment of which component?
A. Cache Memory
B. Flash Drive
C. Hard Disk
D. Optical Drive

Correct Answer: Option A


Explanation:
Hit ratio refers to the percentage of memory access requests that are successfully served directly by the cache instead of going to main memory.

This question belongs to: Computer Memory and Storage Devices
Question #2
What does the term 'cache hit' refer to?
A. Cache is cleared
B. Data is found in the cache
C. Cache is full
D. Data is not found in the cache

Correct Answer: Option B


Explanation:
A cache hit occurs when the CPU requests data and it is found in the cache memory, avoiding the need to access slower main memory.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the main difference between SRAM and DRAM?
A. SRAM is slower than DRAM
B. SRAM needs refreshing; DRAM does not
C. SRAM is non-volatile; DRAM is volatile
D. SRAM uses flip-flops; DRAM uses capacitors

Correct Answer: Option D


Explanation:
SRAM uses flip-flop circuits to store each bit, while DRAM uses a capacitor and a transistor. SRAM is faster and does not need refreshing, but is more expensive. Both are volatile.

This question belongs to: Computer Memory and Storage Devices