Memory and Storage Devices MCQs with Answers

Question #1

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Which of the following memory types has the fastest access time in a computer system hierarchy?

A. Cache Memory

B. Main Memory (RAM)

C. Secondary Storage

D. Registers

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Correct Answer: Option D

Explanation:
CPU registers are located inside the processor itself and have the fastest access time, followed by cache memory, main memory, and secondary storage.

This question belongs to: Computer Memory and Storage Devices

Question #2

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What is the correct full form of EEPROM?

A. Extended Erasable Programmable Read-Only Memory

B. Electrically Erasable Programmable Read-Only Memory

C. Electron Erasable Programmable Read-Only Memory

D. Electrically Encrypted Programmable Read-Only Memory

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Correct Answer: Option B

Explanation:
EEPROM stands for Electrically Erasable Programmable Read-Only Memory. It can be erased and reprogrammed using an electrical charge.

This question belongs to: Computer Memory and Storage Devices

Question #3

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Which of the following units is the largest in terms of data storage capacity?

A. Yottabyte (YB)

B. Petabyte (PB)

C. Terabyte (TB)

D. Exabyte (EB)

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Correct Answer: Option A

Explanation:
Among the options, Yottabyte (YB) is the largest. The order is Terabyte < Petabyte < Exabyte < Yottabyte.

This question belongs to: Computer Memory and Storage Devices

Question #4

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Which type of RAM needs to be constantly refreshed thousands of times per second to retain data?

A. NVRAM

B. SRAM

C. DRAM

D. PRAM

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Correct Answer: Option C

Explanation:
Dynamic RAM (DRAM) stores data in capacitors which lose charge over time, hence it requires continuous refreshing to maintain data integrity.

This question belongs to: Computer Memory and Storage Devices

Question #5

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A standard double-layer DVD can store approximately how much data?

A. 8.5 GB

B. 700 MB

C. 25 GB

D. 4.7 GB

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Correct Answer: Option A

Explanation:
A standard single-layer DVD stores 4.7 GB, while a dual-layer or double-layer DVD can store up to 8.5 GB of data.

This question belongs to: Computer Memory and Storage Devices

Question #6

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Which type of cache memory is typically built directly into the processor chip itself and is the fastest among all cache layers?

A. L1 Cache

B. L3 Cache

C. L2 Cache

D. L4 Cache

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Correct Answer: Option A

Explanation:
L1 cache (Level 1) is the closest and fastest memory layer integrated directly inside the CPU core.

This question belongs to: Computer Memory and Storage Devices

Question #7

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Which statement is true regarding Solid State Drives (SSDs) compared to Hard Disk Drives (HDDs)?

A. SSDs use flash memory and offer faster data access speeds.

B. SSDs have moving mechanical parts and are slower.

C. SSDs are less resistant to physical shocks than HDDs.

D. SSDs consume more power than HDDs.

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Correct Answer: Option A

Explanation:
SSDs use non-volatile flash memory, have no moving parts, and deliver significantly higher read/write speeds compared to traditional HDDs.

This question belongs to: Computer Memory and Storage Devices

Question #8

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How many bytes are there in one Megabyte (MB) when calculated using binary measurement standard?

A. 1024 Bytes

B. 1,048,576 Bytes

C. 1000 Bytes

D. 1,000,000 Bytes

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Correct Answer: Option B

Explanation:
In binary notation, 1 KB = 1024 Bytes, and 1 MB = 1024 KB. Therefore, 1024 * 1024 = 1,048,576 Bytes.

This question belongs to: Computer Memory and Storage Devices

Question #9

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Which computer memory is used to store the bootstrap loader program that initializes the system when powered on?

A. Cache

B. ROM

C. Hard Disk

D. RAM

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Correct Answer: Option B

Explanation:
The BIOS/bootstrap loader is stored in non-volatile ROM (Read-Only Memory) so it is retained even when the computer is turned off.

This question belongs to: Computer Memory and Storage Devices

Question #10

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What technology is used in pen drives (USB flash drives) to retain data without a power source?

A. Magnetic Storage

B. Flash Memory (EEPROM)

C. Static RAM

D. Optical Storage

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Correct Answer: Option B

Explanation:
Pen drives use NAND flash memory, which is a type of electrically erasable programmable read-only memory (EEPROM) that functions without moving parts.

This question belongs to: Computer Memory and Storage Devices

Question #11

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Which of the following is a sequential access storage device?

A. Solid State Drive

B. Magnetic Tape

C. Compact Disc

D. Hard Disk Drive

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Correct Answer: Option B

Explanation:
Magnetic tapes require data to be read or written sequentially from beginning to end, unlike random-access devices like HDDs, SSDs, and CDs.

This question belongs to: Computer Memory and Storage Devices

Question #12

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How many bits constitute a single Nibble?

A. 4 bits

B. 8 bits

C. 2 bits

D. 16 bits

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Correct Answer: Option A

Explanation:
A nibble is exactly half of a byte, meaning it consists of 4 bits.

This question belongs to: Computer Memory and Storage Devices

Question #13

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Which characteristic makes Static RAM (SRAM) different from Dynamic RAM (DRAM)?

A. SRAM uses flip-flops to store data and does not require continuous refreshing.

B. SRAM is slower than DRAM.

C. SRAM is volatile while DRAM is non-volatile.

D. SRAM is cheaper and denser than DRAM.

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Correct Answer: Option A

Explanation:
SRAM uses flip-flops to retain data as long as power is supplied, making it faster and eliminating the need for periodic refreshing cycles unlike DRAM.

This question belongs to: Computer Memory and Storage Devices

Question #14

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What does 'S' stand for in the context of SD cards used in smartphones and cameras?

A. Static Digital

B. Serial Digital

C. Speed Digital

D. Secure Digital

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Correct Answer: Option D

Explanation:
SD card stands for Secure Digital card, a proprietary non-volatile memory card format developed for portable devices.

This question belongs to: Computer Memory and Storage Devices

Question #15

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What is the storage capacity of a standard single-layer Blu-ray Disc?

A. 4.7 GB

B. 25 GB

C. 50 GB

D. 8.5 GB

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Correct Answer: Option B

Explanation:
A standard single-layer Blu-ray disc can hold up to 25 GB of data, whereas dual-layer versions can store up to 50 GB.

This question belongs to: Computer Memory and Storage Devices

Question #16

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Which memory management scheme maps logical address space onto physical storage blocks called pages and frames?

A. Cache Mapping

B. Fragmentation

C. Paging

D. Virtual Memory

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Correct Answer: Option C

Explanation:
Paging is a memory management scheme that eliminates the need for contiguous allocation of physical memory by dividing physical memory into frames and logical memory into pages.

This question belongs to: Computer Memory and Storage Devices

Question #17

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Which term describes the time taken by a hard disk's read/write head to move to the specific track containing the desired data?

A. Latency Time

B. Access Time

C. Transfer Time

D. Seek Time

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Correct Answer: Option D

Explanation:
Seek time is the time required for the hard drive's actuator arm to move the read/write head to the designated track or cylinder.

This question belongs to: Computer Memory and Storage Devices

Question #18

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What type of storage is a CD-ROM?

A. Semiconductor storage

B. Magnetic storage

C. Optical storage

D. Solid-state storage

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Correct Answer: Option C

Explanation:
CD-ROM (Compact Disc Read-Only Memory) uses laser beams to read microscopic pits and lands on the surface of the disc, classifying it as optical storage.

This question belongs to: Computer Memory and Storage Devices

Question #19

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When a computer is turned off, the contents of which component are completely lost?

A. SSD

B. RAM

C. Hard Disk Drive

D. ROM

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Correct Answer: Option B

Explanation:
RAM is volatile memory; it requires an active electrical current to maintain stored data, which is wiped when power is removed.

This question belongs to: Computer Memory and Storage Devices

Question #20

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What is the size of a standard sector in traditional hard disk drives?

A. 4096 Bytes

B. 2048 Bytes

C. 512 Bytes

D. 1024 Bytes

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Correct Answer: Option C

Explanation:
Traditional hard drive architectures format sectors to a standard size of 512 bytes, though newer 'Advanced Format' drives use 4096 bytes (4 KB).

This question belongs to: Computer Memory and Storage Devices

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