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 20 of 22
Question #381
What is the typical capacity of a DVD disc used for movies?
A. 25 GB
B. 8.5 GB (dual layer)
C. Both A and B
D. 4.7 GB (single layer)
Discuss
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Correct Answer: Option C

Explanation:
Commercial DVDs can be single-layer (4.7 GB) or dual-layer (8.5 GB) for longer movies. Both are used.
This question belongs to: Computer Memory and Storage Devices
Question #382
Which of the following is a type of memory that is used for temporary storage of data in a calculator?
A. RAM
B. Flash
C. ROM
D. EEPROM
Discuss
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Correct Answer: Option A

Explanation:
Calculators use RAM for storing current calculations and temporary data, while ROM holds the operating instructions.
This question belongs to: Computer Memory and Storage Devices
Question #383
What is the function of a memory scheduler?
A. To allocate memory to processes
B. To control page faults
C. To reorder memory requests to maximize performance
D. To manage cache lines
Discuss
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Correct Answer: Option C

Explanation:
A memory scheduler in a memory controller reorders incoming read/write requests to optimize bandwidth and reduce latency, improving overall performance.
This question belongs to: Computer Memory and Storage Devices
Question #384
Which of the following is a type of optical disc that is not rewritable?
A. DVD-RW
B. CD-RW
C. BD-R
D. DVD-R
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Correct Answer: Option D

Explanation:
DVD-R is write-once (recordable), not rewritable. CD-RW, DVD-RW, and BD-R are rewritable (or recordable once in case of BD-R? Actually BD-R is write-once, BD-RE is rewritable. But among options, DVD-R is write-once. So D is correct.
This question belongs to: Computer Memory and Storage Devices
Question #385
What is the typical capacity of a double-sided DVD?
A. 4.7 GB
B. 8.5 GB
C. 9.4 GB
D. 17 GB
Discuss
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Correct Answer: Option C

Explanation:
Double-sided DVD (DVD-10) holds 9.4 GB (two layers of 4.7 GB each). Dual-layer single-sided (DVD-9) holds 8.5 GB.
This question belongs to: Computer Memory and Storage Devices
Question #386
Which of the following is a type of memory that is used for caching web pages?
A. Browser cache
B. All of the above
C. Memory cache
D. Disk cache
Discuss
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Correct Answer: Option B

Explanation:
Web pages can be cached in browser cache (on disk), memory, and also in disk cache. The question is ambiguous, but typically browser cache is on disk. However, all are forms of caching.
This question belongs to: Computer Memory and Storage Devices
Question #387
What is the purpose of a memory shadow?
A. To copy ROM contents to RAM for faster access
B. To create a backup of memory
C. To reduce memory usage
D. To encrypt memory contents
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Correct Answer: Option A

Explanation:
Memory shadowing copies BIOS or other ROM contents to faster RAM to improve access speed, since RAM is faster than ROM.
This question belongs to: Computer Memory and Storage Devices
Question #388
Which of the following is a characteristic of a solid-state drive (SSD) over a hard disk drive (HDD)?
A. Higher shock resistance
B. All of the above
C. Lower power consumption
D. Faster data access
Discuss
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Correct Answer: Option B

Explanation:
SSDs have lower power consumption, higher shock resistance, and faster data access compared to HDDs.
This question belongs to: Computer Memory and Storage Devices
Question #389
What is the typical speed of a Blu-ray drive at 6x?
A. 33 MB/s
B. 72 MB/s
C. 216 MB/s
D. 27 MB/s
Discuss
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Correct Answer: Option D

Explanation:
1x Blu-ray = 4.5 MB/s (36 Mbps). 6x = 6 * 4.5 = 27 MB/s.
This question belongs to: Computer Memory and Storage Devices
Question #390
Which of the following is a type of memory that is used for storing the system's configuration data?
A. CMOS
B. ROM
C. DRAM
D. SRAM
Discuss
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Correct Answer: Option A

Explanation:
CMOS memory stores system configuration parameters like date, time, and hardware settings. It is powered by a small battery.
This question belongs to: Computer Memory and Storage Devices
Question #391
What is the function of a memory buffer register (MBR)?
A. To hold the memory address
B. To manage cache
C. To hold data read from or written to memory
D. To store the instruction
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Correct Answer: Option C

Explanation:
The MBR holds the data that is being transferred to or from memory, acting as an intermediate storage.
This question belongs to: Computer Memory and Storage Devices
Question #392
Which of the following is a type of memory that is used for storing digital photos in a camera?
A. RAM
B. SD card
C. ROM
D. Hard disk
Discuss
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Correct Answer: Option B

Explanation:
Digital cameras typically use SD cards or other flash memory cards for photo storage.
This question belongs to: Computer Memory and Storage Devices
Question #393
What is the typical capacity of a DVD-R DL (dual layer) disc?
A. 4.7 GB
B. 8.5 GB
C. 9.4 GB
D. 17 GB
Discuss
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Correct Answer: Option B

Explanation:
DVD-R DL (dual layer) has a capacity of 8.5 GB. Double-sided dual layer would be larger.
This question belongs to: Computer Memory and Storage Devices
Question #394
Which of the following is a type of memory that is used for storing the operating system kernel?
A. RAM
B. Cache
C. Hard disk
D. ROM
Discuss
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Correct Answer: Option A

Explanation:
The operating system kernel is loaded into RAM during boot and resides there while the system is running.
This question belongs to: Computer Memory and Storage Devices
Question #395
What is the purpose of a memory patch?
A. To add more memory
B. To increase memory speed
C. To modify memory contents temporarily
D. To physically repair memory
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Correct Answer: Option C

Explanation:
A memory patch is a modification to the contents of memory, often for debugging or updating code in real-time.
This question belongs to: Computer Memory and Storage Devices
Question #396
Which of the following is a type of memory that is used for storing data in a mobile phone?
A. SRAM
B. DRAM
C. eMMC
D. All of the above
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Correct Answer: Option D

Explanation:
Mobile phones use eMMC or UFS for storage, DRAM for main memory, and SRAM for cache in the processor.
This question belongs to: Computer Memory and Storage Devices
Question #397
What is the typical access time for a register?
A. About 100 nanoseconds
B. About 10 nanoseconds
C. About 1 microsecond
D. Less than 1 nanosecond
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Correct Answer: Option D

Explanation:
Registers are extremely fast, with access times typically less than 1 ns, often a fraction of a clock cycle.
This question belongs to: Computer Memory and Storage Devices
Question #398
Which of the following is a type of memory that is used for storing data in a server?
A. DDR3
B. ECC RAM
C. Non-ECC RAM
D. All of the above
Discuss
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Correct Answer: Option D

Explanation:
Servers may use various types of RAM, but ECC RAM is common for reliability. Non-ECC and DDR3 are also used depending on the system.
This question belongs to: Computer Memory and Storage Devices
Question #399
What is the role of a memory controller in a system with multiple memory channels?
A. To select which channel to use for each access
B. All of the above
C. To combine memory modules into one larger pool
D. To distribute memory accesses across channels for increased bandwidth
Discuss
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Correct Answer: Option B

Explanation:
A memory controller with multiple channels can distribute traffic to increase bandwidth, combine capacities, and select channels based on addressing.
This question belongs to: Computer Memory and Storage Devices
Question #400
Which of the following is a type of memory that is used for storing the firmware of a network router?
A. Flash memory
B. ROM
C. Hard disk
D. RAM
Discuss
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Correct Answer: Option A

Explanation:
Network routers store firmware (operating system) in flash memory, which is non-volatile and can be updated.
This question belongs to: Computer Memory and Storage Devices

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