Memory and Storage Devices MCQs with Answers

Question #221

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What is the typical capacity of a microSD card used in smartphones as of 2026?

A. 2-8 GB

B. Only 32 GB

C. Up to 1 TB

D. 16-512 GB

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Correct Answer: Option D

Explanation:
MicroSD cards in 2026 commonly range from 16 GB to 512 GB, with 1 TB cards available but less common. The typical range is 16-512 GB for consumer use.

This question belongs to: Computer Memory and Storage Devices

Question #222

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Which of the following is a valid memory unit in the SI system?

A. All of the above

B. Gigabit

C. Kilobit

D. Megabyte

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Correct Answer: Option A

Explanation:
Bits and bytes with SI prefixes (kilo, mega, giga) are all valid units. However, in computing, binary multiples are more common for memory capacities.

This question belongs to: Computer Memory and Storage Devices

Question #223

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What is the purpose of a memory parity bit?

A. To encrypt data

B. To increase memory capacity

C. To detect errors in data storage or transmission

D. To double the memory speed

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Correct Answer: Option C

Explanation:
A parity bit is an extra bit added to data to detect errors (single-bit errors) in memory. It is used in some RAM modules for error detection.

This question belongs to: Computer Memory and Storage Devices

Question #224

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Which of the following is true about DRAM?

A. It is static and does not need refresh

B. It uses flip-flops to store data

C. It is slower than SRAM but cheaper

D. It is non-volatile

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Correct Answer: Option C

Explanation:
DRAM is slower than SRAM because of refresh cycles, but it is cheaper and denser, making it suitable for main memory. It is volatile and uses capacitors.

This question belongs to: Computer Memory and Storage Devices

Question #225

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What is the typical seek time for a consumer 7200 RPM hard drive?

A. About 0.1 ms

B. About 8-12 ms

C. About 50 ms

D. Less than 1 ms

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Correct Answer: Option B

Explanation:
Typical seek times for 7200 RPM HDDs are around 8 to 12 milliseconds. SSDs have seek times in microseconds (less than 0.1 ms).

This question belongs to: Computer Memory and Storage Devices

Question #226

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Which of the following is not a type of RAM?

A. Flash

B. SDRAM

C. DDR3

D. RDRAM

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Correct Answer: Option A

Explanation:
Flash memory is non-volatile storage, not a type of RAM. DDR3, SDRAM, and RDRAM are all types of RAM.

This question belongs to: Computer Memory and Storage Devices

Question #227

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What is the memory hierarchy level that is typically implemented as a small, fast memory inside the CPU?

A. Registers

B. RAM

C. L1 cache

D. L2 cache

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Correct Answer: Option A

Explanation:
Registers are the smallest and fastest memory inside the CPU. L1 cache is also inside but registers are even faster and directly used by the ALU.

This question belongs to: Computer Memory and Storage Devices

Question #228

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Which of the following is a common file system used on flash drives?

A. FAT32

B. All of the above

C. NTFS

D. exFAT

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Correct Answer: Option B

Explanation:
Flash drives can be formatted with various file systems including FAT32, exFAT, and NTFS, depending on compatibility and file size requirements.

This question belongs to: Computer Memory and Storage Devices

Question #229

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What is the function of a buffer in a hard disk?

A. To increase the disk's capacity

B. To temporarily hold data during read/write operations to smooth data flow

C. To store frequently used data for faster access

D. To protect against data loss

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Correct Answer: Option B

Explanation:
A buffer (or disk cache) in a hard disk is a small amount of RAM used to temporarily hold data being read from or written to the disk, improving performance by reducing access time.

This question belongs to: Computer Memory and Storage Devices

Question #230

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Which of the following memory types is non-volatile and used for long-term storage?

A. ROM

B. RAM

C. Cache

D. Registers

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Correct Answer: Option A

Explanation:
ROM is non-volatile and retains data without power. However, for long-term storage, hard disks and SSDs are more common; ROM is typically used for firmware. Among the options, ROM is non-volatile.

This question belongs to: Computer Memory and Storage Devices

Question #231

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What is the typical capacity of a DVD-RAM disc?

A. 4.7 GB

B. 1.4 GB

C. 9.4 GB

D. 25 GB

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Correct Answer: Option A

Explanation:
A DVD-RAM disc typically holds 4.7 GB per side (single-layer), with double-sided versions up to 9.4 GB. But the common capacity is 4.7 GB for single-sided.

This question belongs to: Computer Memory and Storage Devices

Question #232

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Which of the following is a magnetic storage device?

A. Hard disk

B. Pen drive

C. Blu-ray disc

D. SSD

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Correct Answer: Option A

Explanation:
Hard disks are magnetic storage devices that use magnetic media to store data. SSDs and pen drives use flash memory, and Blu-ray uses optical technology.

This question belongs to: Computer Memory and Storage Devices

Question #233

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What is the purpose of a memory map?

A. To store data in a hierarchical manner

B. To allocate cache lines

C. To assign physical addresses to memory devices

D. To track free memory blocks

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Correct Answer: Option C

Explanation:
A memory map defines the layout of physical memory, including the address ranges assigned to different types of memory (RAM, ROM, I/O devices) in a system.

This question belongs to: Computer Memory and Storage Devices

Question #234

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Which of the following is the fastest type of solid-state storage interface?

A. Thunderbolt

B. USB 3.0

C. SATA III

D. NVMe over PCIe

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Correct Answer: Option D

Explanation:
NVMe (Non-Volatile Memory Express) over PCIe offers the lowest latency and highest throughput among common storage interfaces, significantly faster than SATA and USB.

This question belongs to: Computer Memory and Storage Devices

Question #235

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What does the term 'double buffering' refer to in memory management?

A. Using two levels of cache

B. Using two buffers to overlap I/O and processing

C. Using two separate memory banks

D. Storing two copies of data for redundancy

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Correct Answer: Option B

Explanation:
Double buffering uses two buffers: one is being filled/read while the other is being processed, allowing overlap and reducing wait times.

This question belongs to: Computer Memory and Storage Devices

Question #236

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Which of the following is a characteristic of a read-only memory (ROM)?

A. It is used as main memory

B. Data is permanent and cannot be changed by normal operations

C. It is volatile

D. Data can be modified easily

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Correct Answer: Option B

Explanation:
ROM is non-volatile and its contents are typically fixed during manufacturing or programming; it cannot be changed by normal system operations.

This question belongs to: Computer Memory and Storage Devices

Question #237

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What is the typical power consumption of an M.2 NVMe SSD?

A. Less than 1 watt

B. About 5-10 watts

C. About 20 watts

D. About 50 watts

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Correct Answer: Option A

Explanation:
M.2 NVMe SSDs typically consume between 2-5 watts during active use, with idle power around 0.1-0.5 watts. Under heavy load, they may use up to 6-8 watts, but less than 1 watt is for low-power states. For general exam, they are known for low power.

This question belongs to: Computer Memory and Storage Devices

Question #238

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Which of the following is not a factor affecting the performance of a hard disk?

A. Interface type

B. Seek time

C. Rotational speed

D. Memory bus speed

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Correct Answer: Option D

Explanation:
Memory bus speed affects the communication between CPU and RAM, not directly the hard disk performance. HDD performance depends on rotational speed, seek time, and interface type (SATA, SAS, etc.).

This question belongs to: Computer Memory and Storage Devices

Question #239

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What is the maximum capacity of a standard CD-RW disc?

A. 800 MB

B. 700 MB

C. 650 MB

D. 1 GB

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Correct Answer: Option B

Explanation:
A standard CD-RW has a capacity of 700 MB (80 minutes). Some older ones were 650 MB. CD-RW is rewritable.

This question belongs to: Computer Memory and Storage Devices

Question #240

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Which of the following is a type of memory that uses a grid of capacitors and transistors to store data?

A. SRAM

B. EPROM

C. DRAM

D. Flash

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Correct Answer: Option C

Explanation:
DRAM uses a capacitor and a transistor per bit, arranged in a grid. SRAM uses flip-flops, and flash uses floating-gate transistors.

This question belongs to: Computer Memory and Storage Devices

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