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 17 of 22
Question #321
Which of the following is a type of memory that has the fastest access time?
A. RAM
B. Hard disk
C. Registers
D. Cache memory
Discuss
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Correct Answer: Option C

Explanation:
Registers have the fastest access time because they are inside the CPU, typically accessed in a single clock cycle.
This question belongs to: Computer Memory and Storage Devices
Question #322
What is the typical capacity of a DVD-R disc?
A. 25 GB
B. 4.7 GB
C. 8.5 GB
D. 700 MB
Discuss
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Correct Answer: Option B

Explanation:
DVD-R (single-layer) holds 4.7 GB. Dual-layer DVD-R DL holds 8.5 GB.
This question belongs to: Computer Memory and Storage Devices
Question #323
Which of the following is a type of memory that is used for storing data and programs that are currently in use?
A. Offline storage
B. Primary storage
C. Secondary storage
D. Tertiary storage
Discuss
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Correct Answer: Option B

Explanation:
Primary storage (RAM) holds data and programs currently being used by the CPU. Secondary storage is for long-term storage.
This question belongs to: Computer Memory and Storage Devices
Question #324
What is the purpose of a memory bus width?
A. It determines the number of bits transferred simultaneously
B. It determines the clock speed
C. It determines the memory capacity
D. It determines the power consumption
Discuss
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Correct Answer: Option A

Explanation:
The bus width (e.g., 64-bit) is the number of bits that can be transferred at once between CPU and memory, affecting bandwidth.
This question belongs to: Computer Memory and Storage Devices
Question #325
Which of the following is a characteristic of PROM?
A. It can be programmed once after manufacturing
B. It can be erased and reprogrammed multiple times
C. It is volatile
D. It is programmed during manufacturing
Discuss
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Correct Answer: Option A

Explanation:
PROM (Programmable ROM) is a memory chip that can be programmed once by the user. After programming, its contents are permanent.
This question belongs to: Computer Memory and Storage Devices
Question #326
What is the typical data transfer rate of a USB 3.1 Gen 1 (same as USB 3.0) port?
A. 20 Gbps
B. 480 Mbps
C. 10 Gbps
D. 5 Gbps
Discuss
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Correct Answer: Option D

Explanation:
USB 3.1 Gen 1 is the same as USB 3.0 and has a max rate of 5 Gbps. USB 3.1 Gen 2 is 10 Gbps, USB 3.2 Gen 2x2 is 20 Gbps.
This question belongs to: Computer Memory and Storage Devices
Question #327
Which of the following is a type of memory that is used as a buffer between the CPU and main memory?
A. Hard disk
B. ROM
C. Cache memory
D. Registers
Discuss
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Correct Answer: Option C

Explanation:
Cache memory acts as a buffer between the fast CPU and slower main memory, storing frequently accessed data to reduce access time.
This question belongs to: Computer Memory and Storage Devices
Question #328
What is the capacity of a standard mini CD?
A. 1.4 GB
B. 210 MB
C. 650 MB
D. 700 MB
Discuss
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Correct Answer: Option B

Explanation:
Mini CDs (8 cm) hold about 210 MB (or 21 minutes of audio), as opposed to standard 700 MB CDs.
This question belongs to: Computer Memory and Storage Devices
Question #329
Which of the following is a type of memory that is non-volatile and used for firmware?
A. SRAM
B. Flash ROM
C. DRAM
D. RAM
Discuss
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Correct Answer: Option B

Explanation:
Flash ROM is non-volatile and often used for storing firmware (BIOS) because it can be updated electrically.
This question belongs to: Computer Memory and Storage Devices
Question #330
What is the typical speed of a 15,000 RPM hard disk drive?
A. Only in external drives
B. Used in laptops
C. Very high performance, used in enterprise servers
D. Common in consumer desktops
Discuss
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Correct Answer: Option C

Explanation:
15,000 RPM drives are high-performance, typically used in enterprise environments for demanding applications, with lower capacities and higher cost.
This question belongs to: Computer Memory and Storage Devices
Question #331
Which of the following is a type of memory that uses a laser to read data?
A. Pen drive
B. CD-ROM
C. SSD
D. Hard disk
Discuss
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Correct Answer: Option B

Explanation:
CD-ROM and other optical discs use a laser to read data by detecting reflected light from pits and lands.
This question belongs to: Computer Memory and Storage Devices
Question #332
What is the function of the memory management unit (MMU) in virtual memory?
A. To control the memory bus
B. To manage cache memory
C. To allocate disk space
D. To translate virtual addresses to physical addresses
Discuss
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Correct Answer: Option D

Explanation:
The MMU performs address translation from virtual addresses used by programs to physical addresses in RAM, enabling virtual memory.
This question belongs to: Computer Memory and Storage Devices
Question #333
Which of the following is a typical latency value for DDR4 RAM?
A. CL9-CL11
B. CL14-CL16
C. CL18-CL22
D. CL30-CL36
Discuss
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Correct Answer: Option B

Explanation:
DDR4 common CAS latencies are around 14-16, though higher speeds may have CL18-22. DDR3 had CL9-11. DDR5 is higher (CL30+). So A is correct for typical DDR4.
This question belongs to: Computer Memory and Storage Devices
Question #334
Which of the following storage devices has the largest storage capacity per unit cost?
A. Blu-ray disc
B. SSD
C. Magnetic tape
D. Hard disk
Discuss
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Correct Answer: Option C

Explanation:
Magnetic tape offers the lowest cost per gigabyte, making it ideal for massive archival storage, though access is slow.
This question belongs to: Computer Memory and Storage Devices
Question #335
What is the purpose of a memory address register (MAR)?
A. To hold the data read from or written to memory
B. To hold the instruction currently being executed
C. To hold the address of the memory location to be accessed
D. To store the program counter
Discuss
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Correct Answer: Option C

Explanation:
The MAR holds the address of a memory location from which data will be fetched or to which data will be stored.
This question belongs to: Computer Memory and Storage Devices
Question #336
Which of the following is a type of memory that is used in enterprise environments for high reliability?
A. SDRAM
B. ECC RAM
C. Non-ECC RAM
D. DDR3
Discuss
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Correct Answer: Option B

Explanation:
ECC RAM includes error correction capabilities, improving system stability and data integrity, making it suitable for servers and mission-critical applications.
This question belongs to: Computer Memory and Storage Devices
Question #337
What is the typical write speed of a DVD-R disc?
A. 11.08 MB/s (1x)
B. 4.5 MB/s (1x)
C. 36 MB/s (1x)
D. 1.32 MB/s (1x)
Discuss
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Correct Answer: Option D

Explanation:
1x DVD data rate is 11.08 Mbit/s = 1.32 MB/s. So write speed at 1x is 1.32 MB/s. Higher multipliers increase speed.
This question belongs to: Computer Memory and Storage Devices
Question #338
Which of the following is a characteristic of a hard disk's track?
A. A circular path on a platter where data is stored
B. The distance between platters
C. A vertical stack of platters
D. A sector on the disk
Discuss
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Correct Answer: Option A

Explanation:
A track is one of many concentric circular paths on a platter surface. Data is written on these tracks.
This question belongs to: Computer Memory and Storage Devices
Question #339
What is the function of a memory mapper?
A. To increase memory speed
B. To map memory addresses to physical locations
C. To control memory refresh
D. To manage cache
Discuss
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Correct Answer: Option B

Explanation:
A memory mapper (like MMU) translates logical addresses to physical addresses, or maps memory regions in systems with limited address space.
This question belongs to: Computer Memory and Storage Devices
Question #340
Which of the following is a type of storage that is non-volatile and uses no moving parts?
A. Hard disk
B. CD-ROM
C. SSD
D. Magnetic tape
Discuss
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Correct Answer: Option C

Explanation:
SSD (Solid State Drive) has no moving parts and uses flash memory, making it non-volatile and shock-resistant.
This question belongs to: Computer Memory and Storage Devices

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