Which of the following is a type of memory that is used for storing data in a security camera? MCQ with Answer and Explanation

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Which of the following is a type of memory that is used for storing data in a security camera?

A. RAM

B. Hard disk

C. SD card

D. ROM

Answer: Option C

Solution (By JKSSB Mock Tests)

Security cameras often use SD cards for local storage of footage, but may also use network storage.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What is the purpose of a memory address register (MAR)?

A. To hold the address of the memory location to be accessed

B. To store the program counter

C. To hold the instruction currently being executed

D. To hold the data read from or written to memory

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Correct Answer: Option A

Explanation:
The MAR holds the address of a memory location from which data will be fetched or to which data will be stored.

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the primary purpose of a memory hierarchy in a computer system?

A. To increase storage capacity

B. To simplify the architecture

C. To balance speed, cost, and capacity

D. To reduce cost

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Correct Answer: Option C

Explanation:
The memory hierarchy is designed to provide a trade-off between speed (fast but expensive) and capacity (slow but cheap), optimizing overall system performance and cost.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which of the following storage devices has the shortest life expectancy?

A. Optical disc

B. Hard disk

C. Magnetic tape

D. SSD

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Correct Answer: Option D

Explanation:
SSDs have a limited number of program/erase cycles, especially TLC and QLC NAND, so they may wear out faster under heavy writes compared to HDDs and other media, though modern SSDs have good endurance.

This question belongs to: Computer Memory and Storage Devices

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