What does 'DDR' stand for in DDR RAM? MCQ with Answer and Explanation

What does 'DDR' stand for in DDR RAM?
A. Dual Data Routing
B. Digital Data Register
C. Double Data Rate
D. Dynamic Data Refresh
Answer: Option C
Solution (By JKSSB Mock Tests)
DDR stands for Double Data Rate, meaning the memory transfers data on both the rising and falling edges of the clock signal, effectively doubling the data rate.

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Practice More Memory and Storage Devices Questions

Question #1
What is the data storage capacity limit of an older, standard single-density 5.25-inch floppy disk?
A. 720 KB
B. 360 KB
C. 2.88 MB
D. 1.44 MB

Correct Answer: Option B


Explanation:
Early double-sided single-density or double-density 5.25-inch floppy disks used on classic PC hardware typically maxed out around 360 KB of capacity.

This question belongs to: Computer Memory and Storage Devices
Question #2
What is the approximate data transfer rate of a SATA III (6 Gbps) interface?
A. 600 MB/s
B. 6 GB/s
C. 3 Gbps
D. 150 MB/s

Correct Answer: Option A


Explanation:
SATA III has a maximum theoretical bandwidth of 6 Gbps, which translates to about 600 MB/s (due to 8b/10b encoding overhead). Actual speeds may be lower.

This question belongs to: Computer Memory and Storage Devices
Question #3
Which component manages data transfers inside a computer system by implementing the 'Least Recently Used' (LRU) algorithm?
A. Optical Drive Firmware
B. Hard drive file allocation table
C. Cache Controller
D. BIOS Boot Loader

Correct Answer: Option C


Explanation:
The cache controller utilizes replacement policies like Least Recently Used (LRU) to determine which older data blocks to discard when space is needed for new cache lines.

This question belongs to: Computer Memory and Storage Devices