Which architectural feature prevents a user from accidentally installing a DDR4 RAM module into a DDR5 motherboard slot? MCQ with Answer and Explanation

Which architectural feature prevents a user from accidentally installing a DDR4 RAM module into a DDR5 motherboard slot?
A. A physically offset structural alignment notch
B. An automatic software warning beep
C. Color-coded connector pins
D. Magnetic resistance shields
Answer: Option A
Solution (By JKSSB Mock Tests)
Each generation of DDR memory features a physical alignment notch carved into a unique position along the pin edge to prevent incompatible physical installation.

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Practice More Memory and Storage Devices Questions

Question #1
What is the typical access time of a hard disk drive compared to RAM?
A. RAM is slower
B. HDD access time is faster
C. They are similar
D. HDD access time is much slower (milliseconds vs nanoseconds)

Correct Answer: Option D


Explanation:
HDD access times are around 5-10 ms (milliseconds), while RAM access times are around 50-100 ns (nanoseconds), making RAM thousands of times faster.

This question belongs to: Computer Memory and Storage Devices
Question #2
Which structural component of flash memory traps electrons to represent binary ones and zeros?
A. Mechanical relay
B. Magnetic core
C. Capacitor bank
D. Floating Gate Transistor

Correct Answer: Option D


Explanation:
Flash memory uses floating gate transistors to trap electrical charges (electrons). The presence or absence of charge alters voltage thresholds, representing 0 or 1.

This question belongs to: Computer Memory and Storage Devices
Question #3
What happens during a computer memory 'Page Fault' scenario?
A. A sector on the hard disk drive undergoes permanent mechanical erosion.
B. The physical memory chip catches fire due to over-voltage.
C. The CPU requests a data block from logical memory that is not currently loaded into physical RAM.
D. The system architecture detects an invalid alphanumeric input string.

Correct Answer: Option C


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