Memory and Storage Devices MCQs with Answers

Question #181

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Which of the following storage media is considered optical storage?

A. DVD

B. Hard disk

C. Pen drive

D. SSD

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Correct Answer: Option A

Explanation:
DVD (Digital Versatile Disc) is an optical storage medium that uses a laser to read and write data. Hard disks, SSDs, and pen drives use magnetic or flash storage.

This question belongs to: Computer Memory and Storage Devices

Question #182

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What does the acronym 'EEPROM' stand for?

A. Electrically Erasable Programmable Random-Only Memory

B. Electrically Erasable Programmable Read-Only Memory

C. Electrically Enabled Programmable ROM

D. Extended Erasable PROM

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Correct Answer: Option B

Explanation:
EEPROM stands for Electrically Erasable Programmable Read-Only Memory, which can be erased and reprogrammed electrically, typically used for storing small amounts of data like BIOS settings.

This question belongs to: Computer Memory and Storage Devices

Question #183

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What is the primary difference between a CD and a DVD?

A. CDs are read-only; DVDs are rewritable

B. DVDs use a shorter wavelength laser, allowing higher density

C. DVDs are older technology

D. CDs store more data than DVDs

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Correct Answer: Option B

Explanation:
DVDs use a shorter wavelength laser (650 nm vs 780 nm for CDs), which allows smaller pits and tighter tracks, resulting in higher storage capacity (4.7 GB vs 700 MB).

This question belongs to: Computer Memory and Storage Devices

Question #184

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Which memory is used for temporary storage of data that is being processed?

A. RAM

B. Hard disk

C. CD-ROM

D. ROM

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Correct Answer: Option A

Explanation:
RAM is used for temporary storage of data and instructions that the CPU is currently processing. It is volatile and loses data when power is off.

This question belongs to: Computer Memory and Storage Devices

Question #185

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What is the typical speed of a 7200 RPM hard disk in terms of average rotational latency?

A. 2.5 ms

B. 5.5 ms

C. 8.33 ms

D. 4.16 ms

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Correct Answer: Option D

Explanation:
Average rotational latency is half of the rotation period. For 7200 RPM, the disk rotates once every 8.33 ms, so average latency is 4.17 ms (approximately).

This question belongs to: Computer Memory and Storage Devices

Question #186

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Which of the following is a disadvantage of an SSD compared to an HDD?

A. Higher cost per GB

B. Slower random access

C. Higher power consumption

D. Noisier operation

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Correct Answer: Option A

Explanation:
SSDs are more expensive per gigabyte than HDDs, though prices have been decreasing. They are quieter, use less power, and have faster random access.

This question belongs to: Computer Memory and Storage Devices

Question #187

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What is the purpose of a memory buffer?

A. To permanently store data

B. To convert data formats

C. To temporarily hold data during transfer

D. To increase memory capacity

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Correct Answer: Option C

Explanation:
A memory buffer is a temporary storage area used to hold data while it is being transferred between different devices or between different speeds, to smooth out data flow.

This question belongs to: Computer Memory and Storage Devices

Question #188

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Which type of memory is directly accessible by the CPU without going through the bus?

A. Cache

B. RAM

C. Registers

D. Hard disk

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Correct Answer: Option C

Explanation:
Registers are internal to the CPU and are directly accessible by the CPU's arithmetic/logic unit, providing the fastest possible access.

This question belongs to: Computer Memory and Storage Devices

Question #189

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What does the term 'wear leveling' refer to in SSDs?

A. Reducing power consumption

B. Improving read speed

C. Evenly distributing write and erase cycles across memory blocks to extend lifespan

D. Defragmenting the drive

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Correct Answer: Option C

Explanation:
Wear leveling is a technique used in flash memory storage to ensure that all memory blocks experience roughly equal write/erase cycles, preventing premature failure of heavily used blocks.

This question belongs to: Computer Memory and Storage Devices

Question #190

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Which of the following is an example of primary storage?

A. Pen drive

B. CD-ROM

C. Hard disk

D. RAM

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Correct Answer: Option D

Explanation:
Primary storage (or main memory) includes RAM and cache, which are directly accessible by the CPU. Secondary storage includes hard disks, optical discs, and pen drives.

This question belongs to: Computer Memory and Storage Devices

Question #191

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What is the maximum theoretical data rate of USB 3.0?

A. 20 Gbps

B. 480 Mbps

C. 5 Gbps

D. 10 Gbps

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Correct Answer: Option C

Explanation:
USB 3.0 (SuperSpeed) has a maximum theoretical data rate of 5 Gbps. USB 2.0 is 480 Mbps, USB 3.1 is 10 Gbps, and USB 3.2 can be 20 Gbps.

This question belongs to: Computer Memory and Storage Devices

Question #192

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What is the function of the 'system clock' in relation to memory?

A. It determines the memory capacity

B. It controls the timing of data transfer between CPU and memory

C. It allocates memory to processes

D. It measures the amount of memory used

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Correct Answer: Option B

Explanation:
The system clock provides a timing signal that synchronizes the operations of the CPU, memory, and other components, coordinating data transfers.

This question belongs to: Computer Memory and Storage Devices

Question #193

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Which of the following is not a characteristic of cache memory?

A. Non-volatile

B. Placed between CPU and main memory

C. Small capacity

D. High speed

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Correct Answer: Option A

Explanation:
Cache memory is volatile; it loses data when power is off. It is small, fast, and located close to the CPU to bridge the speed gap between CPU and RAM.

This question belongs to: Computer Memory and Storage Devices

Question #194

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What is the maximum storage capacity of a standard dual-layer DVD?

A. 9.4 GB

B. 15 GB

C. 4.7 GB

D. 8.5 GB

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Correct Answer: Option D

Explanation:
A dual-layer DVD (DVD-9) holds about 8.5 GB (or 7.95 GiB). Single-layer is 4.7 GB. Some double-sided DVDs have more, but standard dual-layer is 8.5 GB.

This question belongs to: Computer Memory and Storage Devices

Question #195

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What is the primary storage technology used in SSDs?

A. Optical disks

B. DRAM cells

C. NAND flash memory

D. Magnetic disks

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Correct Answer: Option C

Explanation:
SSDs use NAND flash memory, which is non-volatile and based on floating-gate transistors. HDDs use magnetic disks, and optical discs use lasers.

This question belongs to: Computer Memory and Storage Devices

Question #196

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Which memory unit is equivalent to 1024 gigabytes?

A. 1 terabyte

B. 1 kibibyte

C. 1 exabyte

D. 1 petabyte

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Correct Answer: Option A

Explanation:
In binary, 1 terabyte (TB) = 1024 gigabytes (GB). However, in decimal context, 1 TB = 1000 GB. For exam purposes, 1024 GB is often considered 1 TB (though it's actually 1 TiB).

This question belongs to: Computer Memory and Storage Devices

Question #197

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What does the term 'memory latency' refer to?

A. The time to transfer data from memory to CPU

B. The amount of data transferred per second

C. The delay between issuing a request and getting the data

D. The time to refresh memory

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Correct Answer: Option C

Explanation:
Memory latency is the time delay from when a memory access request is issued to when the data is available. It includes various delays like address decoding, access time, and bus latency.

This question belongs to: Computer Memory and Storage Devices

Question #198

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Which of the following is a type of non-volatile memory that can be erased by exposing to ultraviolet light?

A. PROM

B. SRAM

C. EEPROM

D. EPROM

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Correct Answer: Option D

Explanation:
EPROM (Erasable Programmable ROM) can be erased by exposing it to strong ultraviolet light, and then reprogrammed. EEPROM is electrically erasable.

This question belongs to: Computer Memory and Storage Devices

Question #199

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What is the role of a memory management unit (MMU)?

A. To translate virtual addresses to physical addresses

B. To increase the memory capacity

C. To manage cache memory

D. To handle disk I/O

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Correct Answer: Option A

Explanation:
The MMU is a hardware component that translates virtual memory addresses used by the CPU into physical addresses in RAM, enabling virtual memory and protection.

This question belongs to: Computer Memory and Storage Devices

Question #200

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Which of the following storage devices is most suitable for portable data transfer?

A. Hard disk

B. SSD

C. Blu-ray disc

D. USB flash drive (pen drive)

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Correct Answer: Option D

Explanation:
USB flash drives are compact, durable, and easy to carry, making them ideal for portable data transfer. They offer good capacity and speed for everyday use.

This question belongs to: Computer Memory and Storage Devices

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