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. An automatic software warning beep
B. Magnetic resistance shields
C. A physically offset structural alignment notch
D. Color-coded connector pins
Answer: Option C
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
Which memory location holds the specific CPU machine instruction that is currently being decoded and executed by the internal instruction logic?
A. The Program Counter
B. Memory Address Register (MAR)
C. Instruction Register (IR)
D. The Level 3 Cache

Correct Answer: Option C


Explanation:
The Instruction Register (IR) is the dedicated high-speed storage location inside the CPU control unit that holds the binary instruction currently undergoing decoding and execution.

This question belongs to: Computer Memory and Storage Devices
Question #2
Which of the following is a common interface for optical drives?
A. SCSI
B. SATA
C. All of the above
D. IDE

Correct Answer: Option C


Explanation:
Optical drives have been available with SATA, IDE, and SCSI interfaces, though SATA is the most common in modern systems.

This question belongs to: Computer Memory and Storage Devices
Question #3
Which technology is used in Blu-ray discs to achieve higher capacity?
A. Blue-violet laser
B. Infrared laser
C. Ultraviolet laser
D. Red laser

Correct Answer: Option A


Explanation:
Blu-ray discs use a blue-violet laser with a shorter wavelength (405 nm) than the red laser used in DVDs (650 nm), allowing smaller pits and more data per area.

This question belongs to: Computer Memory and Storage Devices