Memory and Storage Devices MCQs

Computer

Memory and Storage Devices MCQs

Practice Memory and Storage Devices MCQs with answers and detailed explanations covering RAM, ROM, cache memory, hard disk, SSD, CD/DVD, pen drive and memory units frequently asked in computer awareness exams.

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Total Questions

Practice Questions

Page 18 of 22
Question #341
What is the typical capacity of a DVD-RW disc?
A. 700 MB
B. 25 GB
C. 8.5 GB
D. 4.7 GB
Discuss
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Correct Answer: Option D

Explanation:
DVD-RW has a capacity of 4.7 GB (single-layer). Dual-layer rewritable discs exist but are less common.
This question belongs to: Computer Memory and Storage Devices
Question #342
Which of the following is a type of memory that is used to store intermediate results during processing?
A. Cache
B. Hard disk
C. RAM
D. Registers
Discuss
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Correct Answer: Option D

Explanation:
Registers store operands and intermediate results during arithmetic and logic operations within the CPU.
This question belongs to: Computer Memory and Storage Devices
Question #343
What is the purpose of a memory module's heatsink?
A. To protect against physical damage
B. To increase memory capacity
C. To dissipate heat generated by the memory chips
D. To improve memory speed
Discuss
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Correct Answer: Option C

Explanation:
Heatsinks on RAM modules help dissipate heat, especially on high-performance memory running at higher speeds, to maintain stability.
This question belongs to: Computer Memory and Storage Devices
Question #344
Which of the following is a characteristic of a hybrid hard drive (SSHD)?
A. It is slower than a traditional HDD
B. It has no moving parts
C. It uses both flash memory and magnetic platters
D. It uses only flash memory
Discuss
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Correct Answer: Option C

Explanation:
An SSHD combines a traditional HDD with a small SSD cache to improve performance while offering large capacity at lower cost than pure SSD.
This question belongs to: Computer Memory and Storage Devices
Question #345
What is the typical speed of a 5400 RPM hard disk in terms of data transfer?
A. About 100 MB/s (sustained)
B. About 200 MB/s
C. About 10 MB/s
D. About 50 MB/s
Discuss
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Correct Answer: Option D

Explanation:
5400 RPM HDDs typically have sustained transfer rates around 50-100 MB/s, but 5400 RPM drives are slower than 7200 RPM, often around 50-80 MB/s. However, modern drives may reach 100+ MB/s. For exam, 50-100 MB/s is typical.
This question belongs to: Computer Memory and Storage Devices
Question #346
Which of the following is a type of memory that is used for storing graphics data?
A. VRAM
B. Cache
C. RAM
D. ROM
Discuss
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Correct Answer: Option A

Explanation:
VRAM (Video RAM) is dedicated memory on graphics cards used for storing frame buffers, textures, and other graphics data, optimized for high bandwidth.
This question belongs to: Computer Memory and Storage Devices
Question #347
What is the role of the memory data register (MDR)?
A. To store the instruction to be executed
B. To hold the memory address
C. To hold the data being transferred to or from memory
D. To control the memory bus
Discuss
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Correct Answer: Option C

Explanation:
The MDR holds the data that is read from or written to memory, acting as a buffer between memory and the CPU.
This question belongs to: Computer Memory and Storage Devices
Question #348
Which of the following is a type of non-volatile memory that can be rewritten many times?
A. EPROM
B. Mask ROM
C. Flash memory
D. PROM
Discuss
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Correct Answer: Option C

Explanation:
Flash memory is non-volatile and can be erased and rewritten many times, making it suitable for SSDs and USB drives.
This question belongs to: Computer Memory and Storage Devices
Question #349
What is the typical access time of a CD-ROM drive?
A. About 100 ms
B. About 1 ms
C. About 10 ms
D. About 0.1 ms
Discuss
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Correct Answer: Option A

Explanation:
CD-ROM drives have access times around 100-200 ms. Hard disks are around 5-10 ms, and SSDs are
This question belongs to: Computer Memory and Storage Devices
Question #350
Which of the following is a type of memory that is used for caching data from a hard disk?
A. CPU cache
B. RAM cache
C. Flash cache
D. Disk cache
Discuss
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Correct Answer: Option D

Explanation:
Disk cache is a portion of RAM used to temporarily store frequently accessed data from the hard disk to improve performance.
This question belongs to: Computer Memory and Storage Devices
Question #351
What is the purpose of a memory test during POST?
A. To verify that RAM is functioning correctly
B. To clear memory contents
C. To optimize memory settings
D. To measure memory speed
Discuss
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Correct Answer: Option A

Explanation:
During Power-On Self-Test (POST), the system checks the RAM to ensure it is functional and can be used by the system.
This question belongs to: Computer Memory and Storage Devices
Question #352
Which of the following is a characteristic of a solid-state drive?
A. It uses optical media
B. It has no moving parts
C. It is susceptible to mechanical failure
D. It requires defragmentation
Discuss
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Correct Answer: Option B

Explanation:
SSDs have no moving parts, making them more reliable and shock-resistant than HDDs. They do not require defragmentation.
This question belongs to: Computer Memory and Storage Devices
Question #353
What is the typical capacity of a microSDHC card?
A. 32 GB to 2 TB
B. 4 GB to 32 GB
C. Up to 512 GB
D. Up to 2 GB
Discuss
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Correct Answer: Option B

Explanation:
SDHC (Secure Digital High Capacity) ranges from 4 GB to 32 GB. SDXC goes from 32 GB to 2 TB.
This question belongs to: Computer Memory and Storage Devices
Question #354
Which of the following is a type of memory that is used to store the operating system?
A. RAM
B. ROM
C. Hard disk
D. Cache
Discuss
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Correct Answer: Option A

Explanation:
The operating system is loaded from secondary storage (hard disk) into RAM (primary storage) for execution. During execution, it resides in RAM.
This question belongs to: Computer Memory and Storage Devices
Question #355
What is the function of a memory controller in a modern CPU?
A. To manage cache
B. To execute instructions
C. To handle I/O operations
D. To manage memory timings and data flow
Discuss
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Correct Answer: Option D

Explanation:
The memory controller in modern CPUs handles the interface with RAM, including address decoding, command generation, and data transfer, optimizing memory performance.
This question belongs to: Computer Memory and Storage Devices
Question #356
Which of the following is a type of memory that is used for temporary storage of data in a printer?
A. ROM
B. Flash
C. Hard disk
D. RAM
Discuss
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Correct Answer: Option D

Explanation:
Printers have RAM (buffer) to store print jobs temporarily while processing, allowing the computer to continue working.
This question belongs to: Computer Memory and Storage Devices
Question #357
What is the typical capacity of a CD-ROM in minutes of audio?
A. 74 minutes
B. 90 minutes
C. 80 minutes
D. 60 minutes
Discuss
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Correct Answer: Option C

Explanation:
Standard CD-ROM holds 80 minutes of audio (or 700 MB), though earlier ones held 74 minutes (650 MB).
This question belongs to: Computer Memory and Storage Devices
Question #358
Which of the following is a type of memory that is used for storage of data in a digital camera?
A. SD card
B. RAM
C. Hard disk
D. ROM
Discuss
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Correct Answer: Option A

Explanation:
Digital cameras use removable flash memory cards like SD cards for storing photos and videos.
This question belongs to: Computer Memory and Storage Devices
Question #359
What is the role of a write buffer in memory?
A. To store frequently read data
B. To increase memory capacity
C. To prevent overwriting
D. To temporarily hold write data to allow the CPU to continue without waiting
Discuss
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Correct Answer: Option D

Explanation:
A write buffer holds data to be written to memory, allowing the CPU to continue execution while the write operation completes asynchronously.
This question belongs to: Computer Memory and Storage Devices
Question #360
Which of the following is a type of memory that is used in embedded systems?
A. SRAM
B. All of the above
C. EEPROM
D. DRAM
Discuss
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Correct Answer: Option B

Explanation:
Embedded systems may use various memory types: SRAM for cache, DRAM for main memory, and EEPROM for configuration storage.
This question belongs to: Computer Memory and Storage Devices

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