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.

438
Total Questions

Practice Questions

Page 16 of 22
Question #301
Which of the following is a type of memory that is non-volatile and can be programmed after manufacturing?
A. Both B and C
B. Mask ROM
C. PROM
D. EPROM
Discuss
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Correct Answer: Option A

Explanation:
PROM (Programmable ROM) can be programmed once after manufacturing, and EPROM can be reprogrammed after erasure. Both are non-volatile and programmable.
This question belongs to: Computer Memory and Storage Devices
Question #302
What is the purpose of a memory bank?
A. To organize memory into separate groups for parallel access
B. To store the operating system
C. To provide memory protection
D. To manage cache hits
Discuss
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Correct Answer: Option A

Explanation:
Memory banks allow multiple memory accesses to occur simultaneously, increasing bandwidth and performance by interleaving.
This question belongs to: Computer Memory and Storage Devices
Question #303
Which of the following is a type of optical disc that is read-only?
A. Blu-ray ROM (BD-ROM)
B. CD-R
C. DVD-RW
D. DVD-RAM
Discuss
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Correct Answer: Option A

Explanation:
BD-ROM is read-only. CD-R and DVD-R are recordable once, DVD-RW and DVD-RAM are rewritable.
This question belongs to: Computer Memory and Storage Devices
Question #304
What is the typical access time of a hard disk drive compared to RAM?
A. HDD access time is much slower (milliseconds vs nanoseconds)
B. RAM is slower
C. They are similar
D. HDD access time is faster
Discuss
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Correct Answer: Option A

Explanation:
HDD access times are around 5-10 ms (milliseconds), while RAM access times are around 50-100 ns (nanoseconds), making RAM thousands of times faster.
This question belongs to: Computer Memory and Storage Devices
Question #305
Which of the following is a type of memory that uses magnetic domains to store data?
A. Hard disk
B. CD-ROM
C. DRAM
D. Flash memory
Discuss
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Correct Answer: Option A

Explanation:
Hard disks store data magnetically on platters. Flash uses charge traps, optical uses pits, DRAM uses capacitors.
This question belongs to: Computer Memory and Storage Devices
Question #306
What is the function of a page file (swap file) in virtual memory?
A. To speed up file access
B. To store data that is not currently in physical RAM on disk
C. To provide a backup of the operating system
D. To manage cache memory
Discuss
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Correct Answer: Option B

Explanation:
The page file is a portion of the hard disk used as additional RAM (swap space) for virtual memory, allowing the system to move inactive pages out of physical RAM.
This question belongs to: Computer Memory and Storage Devices
Question #307
Which of the following is a characteristic of EEPROM?
A. It is used as main memory
B. It can be erased only by UV light
C. It can be electrically erased and reprogrammed byte by byte
D. It is volatile
Discuss
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Correct Answer: Option C

Explanation:
EEPROM allows electrical erasure and reprogramming at the byte level, unlike flash which erases in blocks. It is non-volatile.
This question belongs to: Computer Memory and Storage Devices
Question #308
What is the typical speed of a hard disk's interface SATA III in Gbps?
A. 12 Gbps
B. 16 Gbps
C. 3 Gbps
D. 6 Gbps
Discuss
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Correct Answer: Option D

Explanation:
SATA III (SATA 6G) has a maximum data rate of 6 Gbps. SATA II is 3 Gbps, SATA I is 1.5 Gbps.
This question belongs to: Computer Memory and Storage Devices
Question #309
Which of the following is a type of memory that is used for the CPU's Level 2 (L2) cache?
A. Flash
B. DRAM
C. SDRAM
D. SRAM
Discuss
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Correct Answer: Option D

Explanation:
L2 cache is also built with SRAM for speed, though it may be larger and slightly slower than L1.
This question belongs to: Computer Memory and Storage Devices
Question #310
What is the purpose of error-correcting code (ECC) memory?
A. To reduce power consumption
B. To increase memory capacity
C. To detect and correct data corruption
D. To increase memory speed
Discuss
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Correct Answer: Option C

Explanation:
ECC memory includes extra parity bits to detect and correct single-bit errors, improving data integrity, especially in servers.
This question belongs to: Computer Memory and Storage Devices
Question #311
Which of the following is a typical storage capacity for a USB flash drive in 2026?
A. 128 MB
B. 4 GB
C. 64 GB
D. 1 TB
Discuss
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Correct Answer: Option C

Explanation:
64 GB is a common capacity for USB drives in 2026, though larger sizes like 128 GB and 256 GB are also common. 128 MB and 4 GB are outdated for mainstream.
This question belongs to: Computer Memory and Storage Devices
Question #312
What does the acronym 'NVMe' stand for?
A. Non-Volatile Main memory
B. Non-Volatile Memory Express
C. Network Volatile Memory Engine
D. New Virtual Memory Extension
Discuss
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Correct Answer: Option B

Explanation:
NVMe is a protocol designed for SSDs using PCIe, providing low latency and high throughput for non-volatile memory.
This question belongs to: Computer Memory and Storage Devices
Question #313
Which of the following is a characteristic of a hard disk's platter?
A. It rotates at a constant speed
B. It stores data in flash cells
C. It is a non-removable part of an SSD
D. It is made of silicon
Discuss
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Correct Answer: Option A

Explanation:
Platters in a hard disk rotate at a constant speed (e.g., 7200 RPM). They are made of aluminum/glass with magnetic coating, not silicon, and are used in HDDs, not SSDs.
This question belongs to: Computer Memory and Storage Devices
Question #314
What is the typical speed of a CD-ROM drive at 52x?
A. 52 MB/s
B. 1.3 MB/s
C. 7.8 MB/s
D. 52 KB/s
Discuss
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Correct Answer: Option C

Explanation:
1x CD speed is 150 KB/s. 52x is 52 * 150 = 7800 KB/s = 7.8 MB/s. So option B is correct.
This question belongs to: Computer Memory and Storage Devices
Question #315
Which of the following is a type of memory that is used for storing the system's BIOS?
A. Hard disk
B. Cache
C. ROM
D. RAM
Discuss
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Correct Answer: Option C

Explanation:
BIOS is stored in ROM (or flash memory) on the motherboard, as it must be non-volatile and available at boot.
This question belongs to: Computer Memory and Storage Devices
Question #316
What is the function of a memory decoder?
A. To manage cache replacement
B. To control the memory bus
C. To select a specific memory location based on an address
D. To encode data into memory
Discuss
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Correct Answer: Option C

Explanation:
A memory decoder takes the memory address and activates the appropriate row and column lines to access the correct memory cell.
This question belongs to: Computer Memory and Storage Devices
Question #317
Which of the following is a characteristic of flash memory used in SSDs?
A. It is volatile
B. It has a limited number of write cycles
C. It is more expensive per GB than HDDs but faster
D. It is slower than HDDs
Discuss
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Correct Answer: Option B

Explanation:
Flash memory has a finite number of program/erase cycles, affecting SSD lifespan. It is non-volatile, faster than HDDs, and typically more expensive per GB.
This question belongs to: Computer Memory and Storage Devices
Question #318
What is the typical storage capacity of a Blu-ray disc in GB?
A. 700 MB
B. 4.7 GB
C. 128 GB
D. 25 GB (single layer)
Discuss
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Correct Answer: Option D

Explanation:
Single-layer Blu-ray holds 25 GB. Dual-layer 50 GB, triple 100 GB, quad 128 GB. The most common is 25 GB.
This question belongs to: Computer Memory and Storage Devices
Question #319
Which of the following is a type of memory that is directly accessible by the CPU without address translation?
A. Registers
B. Cache memory
C. Physical memory
D. Virtual memory
Discuss
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Correct Answer: Option A

Explanation:
Registers are directly accessible by the CPU's execution units; they are part of the CPU. Physical memory (RAM) is accessed via addresses, and virtual memory requires translation.
This question belongs to: Computer Memory and Storage Devices
Question #320
What is the function of a memory stick (pen drive) in terms of storage?
A. It is a type of optical disc
B. It is a magnetic storage medium
C. It is a type of RAM
D. It is a removable flash storage device
Discuss
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Correct Answer: Option D

Explanation:
A pen drive (USB flash drive) is a removable storage device using flash memory, non-volatile and portable.
This question belongs to: Computer Memory and Storage Devices

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