Which memory metric describes the time interval between a memory controller issuing a command and the data becoming available on the output pins? MCQ with Answer and Explanation

Which memory metric describes the time interval between a memory controller issuing a command and the data becoming available on the output pins?
A. Bandwidth
B. CAS Latency
C. Refresh rate
D. Clock Rate
Answer: Option B
Solution (By JKSSB Mock Tests)
CAS (Column Address Strobe) Latency indicates the delay cycle count between an internal data request command and when the first bit of data is delivered.

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Practice More Memory and Storage Devices Questions

Question #1
Why is cache memory constructed using Static RAM (SRAM) instead of Dynamic RAM (DRAM)?
A. SRAM does not need refresh cycles, allowing for significantly higher operation speeds.
B. SRAM is non-volatile and preserves data when power is disconnected.
C. SRAM is much cheaper to scale up in size.
D. SRAM requires complex capacitor discharge routines.

Correct Answer: Option A


Explanation:
SRAM is substantially faster than DRAM because it uses a multi-transistor configuration (flip-flops) that retains state instantly without periodic electrical refreshing.

This question belongs to: Computer Memory and Storage Devices
Question #2
What is the typical storage capacity of a standard DVD?
A. 128 GB
B. 4.7 GB
C. 700 MB
D. 25 GB

Correct Answer: Option B


Explanation:
A standard single-layer DVD holds about 4.7 GB (or 4.38 GiB) of data. A CD holds ~700 MB, Blu-ray single layer ~25 GB, and pen drives vary.

This question belongs to: Computer Memory and Storage Devices
Question #3
What does the term 'M.2' refer to in storage devices?
A. A file system
B. A type of RAM
C. A connector for hard disks
D. A form factor for SSDs

Correct Answer: Option D


Explanation:
M.2 is a form factor for internal expansion cards, commonly used for SSDs, offering compact size and support for NVMe or SATA interfaces.

This question belongs to: Computer Memory and Storage Devices