What does the acronym 'SDRAM' stand for? MCQ with Answer and Explanation

What does the acronym 'SDRAM' stand for?
A. Static Dynamic RAM
B. Single Data Rate RAM
C. Synchronous Dynamic Random Access Memory
D. Synchronous Data RAM
Answer: Option C
Solution (By JKSSB Mock Tests)
SDRAM stands for Synchronous Dynamic Random Access Memory, which synchronizes with the system clock for faster data transfer compared to asynchronous DRAM.

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Practice More Memory and Storage Devices Questions

Question #1
What is the typical speed of a 5400 RPM hard disk in terms of data transfer?
A. About 10 MB/s
B. About 200 MB/s
C. About 50 MB/s
D. About 100 MB/s (sustained)

Correct Answer: Option C


Explanation:
5400 RPM HDDs typically have sustained transfer rates around 50-100 MB/s, but 5400 RPM drives are slower than 7200 RPM, often around 50-80 MB/s. However, modern drives may reach 100+ MB/s. For exam, 50-100 MB/s is typical.

This question belongs to: Computer Memory and Storage Devices
Question #2
Which measurement represents the standard rotational velocity metric of modern high-performance desktop mechanical hard drives?
A. Gbps (Gigabits per second)
B. MHz (Megahertz)
C. RPM (Rotations per minute)
D. IOPS (Input/Output Operations Per Second)

Correct Answer: Option C


Explanation:
Mechanical hard drive speeds are fundamentally constrained by how fast their physical platters spin, measured in Rotations Per Minute (RPM), commonly 5400 or 7200 RPM.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the main purpose of virtual memory?
A. To increase the physical RAM capacity
B. To reduce the cost of memory
C. To allow programs to use more memory than physically available
D. To speed up memory access

Correct Answer: Option C


Explanation:
Virtual memory enables a computer to use more memory than is physically installed by swapping data between RAM and secondary storage (like a hard disk), allowing large programs to run.

This question belongs to: Computer Memory and Storage Devices