Memory and Storage Devices MCQs with Answers

Question #121

What hardware feature on an internal motherboard controls the synchronization and flow of data commands arriving from the system RAM to the processor cores?

A. The Memory Controller

B. The Power Supply Relay

C. The Expansion Slot Bracket

D. The Sound Card

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Correct Answer: Option A

Explanation:
The memory controller (either standalone on the chipset or integrated directly inside modern CPU dies) manages the electrical signals and data timing for reading and writing to system RAM.

This question belongs to: Computer Memory and Storage Devices

Question #122

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Which type of flash memory cell stores exactly three distinct bits of data inside a single physical transistor by managing eight distinct voltage levels?

A. Triple-Level Cell (TLC)

B. Single-Level Cell (SLC)

C. Multi-Level Cell (MLC)

D. Quad-Level Cell (QLC)

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Correct Answer: Option A

Explanation:
Triple-Level Cell (TLC) flash memory architectures design cells to retain 3 distinct bits of binary data per transistor by utilizing 8 different internal voltage states.

This question belongs to: Computer Memory and Storage Devices

Question #123

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How many nibbles are contained inside a data packet size of exactly 16 bits?

A. 8 nibbles

B. 4 nibbles

C. 16 nibbles

D. 2 nibbles

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Correct Answer: Option B

Explanation:
Since 1 nibble is equal to 4 bits, a 16-bit data segment contains exactly $16 / 4 = 4$ nibbles.

This question belongs to: Computer Memory and Storage Devices

Question #124

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Which data communication standard provides the thin physical wiring and interface protocol layer for connecting standard internal 2.5-inch hard drives to modern computer motherboards?

A. USB Type-C

B. SATA (Serial ATA)

C. SCSI interface

D. PATA / IDE

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Correct Answer: Option B

Explanation:
SATA (Serial Advanced Technology Attachment) is the standard point-to-point interface bus used to connect internal storage drives (HDDs/SSDs) and optical drives to modern computer systems.

This question belongs to: Computer Memory and Storage Devices

Question #125

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What is the primary operational objective of implementing a 'Write-Through' design pattern inside a CPU cache architecture?

A. To write data to both the cache block and the main system memory simultaneously to maintain data consistency.

B. To bypass the main memory entirely during computational loops.

C. To force data straight into external backup clouds.

D. To accelerate data deletion routines.

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Correct Answer: Option A

Explanation:
A write-through cache policy ensures that whenever data is modified in the cache, it is immediately written to the main memory as well, maintaining data synchronization across levels.

This question belongs to: Computer Memory and Storage Devices

Question #126

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Which component is missing from a Solid State Drive (SSD) that is fundamentally present in a traditional mechanical Hard Disk Drive?

A. Internal firmware instructions

B. A physical read/write actuator arm and spinning platter

C. An integrated circuit controller

D. A connection interface data bus port

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Correct Answer: Option B

Explanation:
SSDs are purely electronic devices that use flash memory chips, meaning they lack the spinning platters, spindle motors, and moving read/write arms found in mechanical HDDs.

This question belongs to: Computer Memory and Storage Devices

Question #127

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Which of the following data storage units represents the smallest value?

A. 1 Petabyte

B. 1 Terabyte

C. 1 Gigabyte

D. 1 Megabyte

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Correct Answer: Option D

Explanation:
Among the options provided, Megabyte (MB) is the smallest unit ($10^6$ or $2^{20}$ bytes), followed by Gigabyte, Terabyte, and Petabyte.

This question belongs to: Computer Memory and Storage Devices

Question #128

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What characteristic of a computer system is optimized when a designer adds more channels to the main system memory bus layout?

A. The system memory bandwidth and data throughput rates.

B. The maximum capacity of the secondary storage drives.

C. The permanent storage durability of the ROM firmware.

D. The resolution of the external monitor display.

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Correct Answer: Option A

Explanation:
Adding more memory channels increases the width of the data bus between the CPU and RAM, allowing more data bits to transfer simultaneously and boosting system memory bandwidth.

This question belongs to: Computer Memory and Storage Devices

Question #129

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Which type of memory card form factor is universally used to expand storage in modern smartphones?

A. Full-size SD Card

B. microSD Card

C. CompactFlash Card

D. MiniSD Card

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Correct Answer: Option B

Explanation:
The microSD card is an ultra-compact version of the Secure Digital card standard, making it the choice for smartphones and small portable devices.

This question belongs to: Computer Memory and Storage Devices

Question #130

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Which of the following is a volatile memory?

A. ROM

B. Hard disk

C. RAM

D. CD-ROM

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Correct Answer: Option C

Explanation:
RAM (Random Access Memory) is volatile, meaning it loses its contents when power is turned off. ROM, hard disk, and CD-ROM are non-volatile.

This question belongs to: Computer Memory and Storage Devices

Question #131

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What is the smallest unit of data storage in a computer?

A. Nibble

B. Byte

C. Kilobyte

D. Bit

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Correct Answer: Option D

Explanation:
A bit is the smallest unit of data in computing and can have a value of 0 or 1. A byte is 8 bits, a kilobyte is 1024 bytes, and a nibble is 4 bits.

This question belongs to: Computer Memory and Storage Devices

Question #132

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Which type of memory uses capacitors to store data and needs periodic refreshing?

A. ROM

B. Flash memory

C. SRAM

D. DRAM

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Correct Answer: Option D

Explanation:
DRAM (Dynamic RAM) uses capacitors to store bits; they leak charge and must be refreshed periodically. SRAM uses flip-flops and does not need refreshing.

This question belongs to: Computer Memory and Storage Devices

Question #133

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What does the acronym SSD stand for?

A. Solid System Disk

B. Solid State Drive

C. Synchronous Storage Device

D. Serial Storage Drive

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Correct Answer: Option B

Explanation:
SSD stands for Solid State Drive, a storage device using integrated circuit assemblies as memory to store data persistently.

This question belongs to: Computer Memory and Storage Devices

Question #134

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Which memory is closest to the CPU in the memory hierarchy?

A. Hard disk

B. Cache memory

C. RAM

D. Registers

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Correct Answer: Option D

Explanation:
Registers are the fastest and closest memory to the CPU, located inside the processor core. Cache is next, then RAM, then hard disk.

This question belongs to: Computer Memory and Storage Devices

Question #135

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Which of the following is a non-volatile memory?

A. Registers

B. ROM

C. RAM

D. Cache memory

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Correct Answer: Option B

Explanation:
ROM (Read-Only Memory) is non-volatile, retaining data even when power is off. RAM and cache are volatile; registers are volatile as well.

This question belongs to: Computer Memory and Storage Devices

Question #136

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What is the typical storage capacity of a standard DVD?

A. 128 GB

B. 25 GB

C. 4.7 GB

D. 700 MB

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Correct Answer: Option C

Explanation:
A standard single-layer DVD holds about 4.7 GB (or 4.38 GiB) of data. A CD holds ~700 MB, Blu-ray single layer ~25 GB, and pen drives vary.

This question belongs to: Computer Memory and Storage Devices

Question #137

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Which component of a hard disk drive is responsible for reading and writing data?

A. Spindle

B. Platter

C. Read/Write head

D. Actuator arm

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Correct Answer: Option C

Explanation:
The read/write head is the component that reads data from and writes data to the platters. The actuator arm moves the head, and the spindle rotates the platters.

This question belongs to: Computer Memory and Storage Devices

Question #138

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What is the unit of measurement for memory speed in RAM?

A. MHz

B. MB/s

C. MT/s

D. Both A and C

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Correct Answer: Option D

Explanation:
RAM speed is often measured in MHz (cycles per second) and MT/s (megatransfers per second) for DDR modules, where the effective data rate is double the clock frequency.

This question belongs to: Computer Memory and Storage Devices

Question #139

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Which of the following is not a type of ROM?

A. PROM

B. SDRAM

C. EPROM

D. EEPROM

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Correct Answer: Option B

Explanation:
SDRAM (Synchronous Dynamic RAM) is a type of RAM, not ROM. PROM, EPROM, and EEPROM are programmable read-only memory types.

This question belongs to: Computer Memory and Storage Devices

Question #140

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What does the term 'cache hit' refer to?

A. Cache is full

B. Cache is cleared

C. Data is found in the cache

D. Data is not found in the cache

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Correct Answer: Option C

Explanation:
A cache hit occurs when the CPU requests data and it is found in the cache memory, avoiding the need to access slower main memory.

This question belongs to: Computer Memory and Storage Devices

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