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

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Question #21
Which of the following is an example of non-volatile memory?
A. ROM
B. SRAM
C. DRAM
D. L2 Cache
Discuss
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Correct Answer: Option A

Explanation:
ROM (Read-Only Memory) is non-volatile as it retains its data even when the device is completely powered off.
This question belongs to: Computer Memory and Storage Devices
Question #22
What does a computer use to bridge the speed disparity between the ultra-fast CPU and the slower main memory?
A. Hard Disk Drive
B. Cache Memory
C. Virtual Memory
D. ROM
Discuss
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Correct Answer: Option B

Explanation:
Cache memory is small, high-speed semiconductor memory designed to hold frequently accessed instructions and data to minimize CPU wait times.
This question belongs to: Computer Memory and Storage Devices
Question #23
The term 'Hit Ratio' is most frequently evaluated in the performance assessment of which component?
A. Hard Disk
B. Flash Drive
C. Optical Drive
D. Cache Memory
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Correct Answer: Option D

Explanation:
Hit ratio refers to the percentage of memory access requests that are successfully served directly by the cache instead of going to main memory.
This question belongs to: Computer Memory and Storage Devices
Question #24
Which memory unit corresponds exactly to 1024 Terabytes?
A. 1 Gigabyte
B. 1 Exabyte
C. 1 Petabyte
D. 1 Zettabyte
Discuss
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Correct Answer: Option C

Explanation:
1 Petabyte (PB) is equivalent to 1024 Terabytes (TB) according to binary memory measurements.
This question belongs to: Computer Memory and Storage Devices
Question #25
Which phenomenon occurs when a program continuously swaps pages between RAM and secondary storage due to inadequate primary memory space?
A. Fragmentation
B. Paging
C. Interleaving
D. Thrashing
Discuss
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Correct Answer: Option D

Explanation:
Thrashing occurs when the operating system spends more time moving system resources between virtual and physical memory than actually executing process instructions.
This question belongs to: Computer Memory and Storage Devices
Question #26
Which interface protocol is specifically designed to optimize data transfer speeds for Solid State Drives directly over the PCIe lanes?
A. SCSI
B. SATA
C. NVMe
D. PATA
Discuss
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Correct Answer: Option C

Explanation:
NVMe (Non-Volatile Memory Express) is an optimized, high-performance scalable host controller interface designed specifically for enterprise and client systems using PCIe SSDs.
This question belongs to: Computer Memory and Storage Devices
Question #27
What is the standard maximum capacity of a classic 3.5-inch High-Density Floppy Disk?
A. 1.44 MB
B. 2.88 MB
C. 1.2 MB
D. 720 KB
Discuss
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Correct Answer: Option A

Explanation:
The standard high-density 3.5-inch floppy disk widely used in personal computers has a formatted storage capacity of 1.44 Megabytes.
This question belongs to: Computer Memory and Storage Devices
Question #28
Which technology is applied in writing data onto a CD-RW disc to allow repeated overwriting?
A. Floating gate transistor charging
B. Dye ablation
C. Phase-change alloy material
D. Magnetic field reversal
Discuss
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Correct Answer: Option C

Explanation:
CD-RW discs use a phase-change material that can transition between crystalline (reflective) and amorphous (absorbent) states via laser heating to clear or write data.
This question belongs to: Computer Memory and Storage Devices
Question #29
What is the primary function of the 'Write Protect' switch on an SD card or old floppy disk?
A. To accelerate data access speed
B. To encrypt stored files
C. To prevent accidental deletion or modification of data
D. To allow remote file sharing
Discuss
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Correct Answer: Option C

Explanation:
The write-protect option physically or digitally locks the media to prevent any modification, deletion, or addition of new file content.
This question belongs to: Computer Memory and Storage Devices
Question #30
In computer data organization, what does a single 'Word' represent?
A. The standard space needed to save a string character.
B. The natural unit of data used by a particular CPU design (e.g., 32-bit or 64-bit).
C. A fixed group of 8 bits.
D. A text element containing no numerical integers.
Discuss
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Correct Answer: Option B

Explanation:
A computer word is the standard size of data that a processor can handle and execute in a single operation, typically 32 or 64 bits modernly.
This question belongs to: Computer Memory and Storage Devices
Question #31
Which of the following describes the operational concept of a 'Virtual Memory'?
A. An extremely large main memory array made of high-speed SRAM.
B. A cloud-based storage system that bypasses the local operating system.
C. A dedicated memory chip installed exclusively inside advanced graphics cards.
D. An illusion of an extremely large main memory achieved by using a part of secondary storage.
Discuss
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Correct Answer: Option D

Explanation:
Virtual memory is a memory management technique that uses secondary storage (like an HDD or SSD) to simulate additional RAM, allowing programs to run even if they exceed physical memory capacity.
This question belongs to: Computer Memory and Storage Devices
Question #32
What is the primary architectural disadvantage of Dynamic RAM (DRAM) compared to Static RAM (SRAM)?
A. DRAM cannot handle multi-threaded processing requests.
B. DRAM requires periodic electrical refreshing which slows down access speed.
C. DRAM consumes less power overall.
D. DRAM is structurally more complex and expensive per gigabyte.
Discuss
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Correct Answer: Option B

Explanation:
DRAM stores data using capacitors, which lose charge over time. This design requires continuous refreshing cycles, introducing latency that makes it slower than SRAM.
This question belongs to: Computer Memory and Storage Devices
Question #33
Which specific optical storage standard uses a shorter wavelength blue-violet laser to read and write data, allowing for significantly higher data density?
A. DVD-R
B. Magnetic Tape
C. CD-ROM
D. Blu-ray Disc
Discuss
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Correct Answer: Option D

Explanation:
Blu-ray discs use a 405nm blue-violet laser, which has a shorter wavelength than the red lasers used in DVDs and CDs, allowing it to focus on smaller pits and pack more data.
This question belongs to: Computer Memory and Storage Devices
Question #34
What is the physical arrangement of circular data recording areas on a hard disk platter surface called?
A. Clusters
B. Cylinders
C. Sectors
D. Tracks
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Correct Answer: Option D

Explanation:
Tracks are concentric circles written onto the surface of a hard disk platter. These tracks are further subdivided into smaller segments called sectors.
This question belongs to: Computer Memory and Storage Devices
Question #35
How many Kilobytes (KB) constitute exactly one Gigabyte (GB) in standard binary computing notation?
A. 512,000 KB
B. 1,000,000 KB
C. 1,024 KB
D. 1,048,576 KB
Discuss
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Correct Answer: Option D

Explanation:
Since 1 MB = 1024 KB and 1 GB = 1024 MB, multiplying 1024 by 1024 gives exactly 1,048,576 Kilobytes in one Gigabyte.
This question belongs to: Computer Memory and Storage Devices
Question #36
Which of the following is a non-volatile semiconductor memory that can be erased and reprogrammed in large blocks rather than byte-by-byte?
A. Mask ROM
B. DRAM
C. Flash Memory
D. SRAM
Discuss
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Correct Answer: Option C

Explanation:
Flash memory is a variation of EEPROM that is erased and programmed in large blocks or sectors, making it ideal for SSDs, pen drives, and SD cards.
This question belongs to: Computer Memory and Storage Devices
Question #37
The time it takes for a targeted data sector on a hard drive platter to rotate under the read/write head is called:
A. Rotational Latency
B. Transfer Rate
C. Seek Time
D. Settling Time
Discuss
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Correct Answer: Option A

Explanation:
Rotational latency is the delay spent waiting for the spinning disk platter to bring the specific requested data sector directly beneath the read/write head.
This question belongs to: Computer Memory and Storage Devices
Question #38
Which level of cache memory is typically shared among multiple cores of a modern multi-core CPU architecture?
A. L3 Cache
B. L1 Cache
C. L0 Cache
D. L2 Cache
Discuss
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Correct Answer: Option A

Explanation:
While L1 and L2 caches are generally dedicated to individual CPU cores, the L3 cache is larger, slightly slower, and shared across all cores on the processor die.
This question belongs to: Computer Memory and Storage Devices
Question #39
What is the smallest logic allocation unit of data storage on a hard disk drive recognized by an operating system's file system?
A. Platter
B. Cluster
C. Sector
D. Track
Discuss
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Correct Answer: Option B

Explanation:
A cluster (or allocation unit) is a group of sectors combined by the operating system's file system to form the smallest legal space where a file can be stored.
This question belongs to: Computer Memory and Storage Devices
Question #40
Which of the following storage mediums relies purely on magnetic property manipulation to record digital data?
A. Secure Digital (SD) Card
B. Hard Disk Drive (HDD)
C. Compact Disc (CD)
D. Solid State Drive (SSD)
Discuss
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Correct Answer: Option B

Explanation:
Hard Disk Drives use platters coated with magnetic material and magnetic heads to alter and read polarization patterns representing binary data.
This question belongs to: Computer Memory and Storage Devices

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