What is the memory cache 'miss' penalty? MCQ with Answer and Explanation

What is the memory cache 'miss' penalty?
A. The reduction in processing speed when multiple applications compete for CPU space.
B. The extra time needed to fetch data from the slower main memory when it is not found in the cache.
C. The financial cost of manufacturing faster cache chips.
D. The permanent loss of data due to system power fluctuations.
Answer: Option B
Solution (By JKSSB Mock Tests)
When the CPU looks for data in the cache and fails to find it (a cache miss), it suffers a time delay penalty because it must fetch that data from the slower system RAM.

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Practice More Memory and Storage Devices Questions

Question #1
What happens during a computer memory 'Page Fault' scenario?
A. The system architecture detects an invalid alphanumeric input string.
B. The physical memory chip catches fire due to over-voltage.
C. A sector on the hard disk drive undergoes permanent mechanical erosion.
D. The CPU requests a data block from logical memory that is not currently loaded into physical RAM.

Correct Answer: Option D


Explanation:
A page fault occurs when a running program attempts to access a memory page mapped into its virtual address space, but that page is not presently resident in physical RAM.

This question belongs to: Computer Memory and Storage Devices
Question #2
What is the typical capacity of a 2.5-inch hard disk drive used in laptops?
A. 500 GB to 2 TB
B. 10-100 GB
C. 1-2 GB
D. 4-8 TB

Correct Answer: Option A


Explanation:
2.5-inch HDDs commonly range from 500 GB to 2 TB for laptops, with larger capacities available. 3.5-inch drives typically have higher capacities (up to 10 TB+).

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the typical speed of a DVD drive at 16x?
A. 21.12 MB/s
B. 22.16 MB/s
C. 48.5 MB/s
D. 16 MB/s

Correct Answer: Option A


Explanation:
1x DVD is 1.32 MB/s, so 16x = 16 * 1.32 = 21.12 MB/s.

This question belongs to: Computer Memory and Storage Devices