Which of the following is a characteristic of dynamic RAM (DRAM)? MCQ with Answer and Explanation

Which of the following is a characteristic of dynamic RAM (DRAM)?
A. It is non-volatile
B. It requires periodic refreshing
C. It uses flip-flops
D. It is faster than SRAM
Answer: Option B
Solution (By JKSSB Mock Tests)
DRAM stores data in capacitors, which lose charge over time; thus, it requires periodic refreshing (every few milliseconds) to retain data. SRAM is faster but more expensive.

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Practice More Memory and Storage Devices Questions

Question #1
Which of the following data storage units represents the smallest value?
A. 1 Gigabyte
B. 1 Terabyte
C. 1 Petabyte
D. 1 Megabyte

Correct Answer: Option D


Explanation:
Among the options provided, Megabyte (MB) is the smallest unit ($10^6$ or $2^{20}$ bytes), followed by Gigabyte, Terabyte, and Petabyte.

This question belongs to: Computer Memory and Storage Devices
Question #2
What is the typical access time for a register?
A. About 1 microsecond
B. About 10 nanoseconds
C. Less than 1 nanosecond
D. About 100 nanoseconds

Correct Answer: Option C


Explanation:
Registers are extremely fast, with access times typically less than 1 ns, often a fraction of a clock cycle.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the primary purpose of a memory hierarchy in a computer system?
A. To reduce cost
B. To balance speed, cost, and capacity
C. To increase storage capacity
D. To simplify the architecture

Correct Answer: Option B


Explanation:
The memory hierarchy is designed to provide a trade-off between speed (fast but expensive) and capacity (slow but cheap), optimizing overall system performance and cost.

This question belongs to: Computer Memory and Storage Devices