Computer Knowledge

Computer Memory and Storage

2,477 Questions

Computer memory and storage questions test foundational knowledge of hardware, cache mapping, and data transfer mechanisms. Key areas include Direct Memory Access, analog recording, and RAID levels. This section is essential for candidates preparing for banking and government computer proficiency tests.

Cache memory mappingDirect memory accessRAID storage levelsHard disk technologyOptical media storageMemory addresses

Computer Memory and Storage Questions

Multiple choice

A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD?

  1. DVD supports Standard Definition video while BD supports High Definition video.
  2. Compared to a DVD, the BD format has several times more storage capacity.
  3. Thickness of BD is 2. Which of the statements given above is/are correct?
  4. mm while that of DVD is 1.2 mm.

Which of the statements given above is/ are correct?

  1. 1 only

  2. 1 and 2 only

  3. 2 and 3 only

  4. 1, 2 and 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Blu-ray Disc (official abbreviation BD) is anoptical disc storage medium. The name Blu-ray Disc refers to the blue laser used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs. DVD supports Standard Definition video while BD supports High Definition video.  Parameters  Blu-ray  Storage capacity---25GB (single-layer) and 50GB (dual-layer)  Laser wavelength------405nm (blue laser)  Numerical aperture (NA)--0.85  Disc diameter------120mm  Disc thickness----1.2mm  DVD  Storage capacity---4.7GB (single-layer) and 8.5GB (dual-layer)  Laser wavelength---650nm (red laser)  Numerical aperture (NA)---0.60  Disc diameter----120mm  Disc thickness----1.2mm 

Multiple choice

You should not store a CD near a magnet because

  1. the magnet will rust

  2. the magnet will become weaker

  3. the information in the disk may get erased

  4. the magnet will break the disk
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

You should not store a CD near a magnet because the information in the disk may get erased.

Multiple choice

For what purpose is the swap space in the disk used?

  1. Saving temporary internet files

  2. Saving HTML pages

  3. Saving process data

  4. Storing TLB

  5. Saving device drivers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Swap space is used when the amount of physical memory (RAM) is full. If the system needs more memory resources and the RAM is full, inactive pages in memory are moved to the swap space. While swap space can help machines with a small amount of RAM, it should not be considered a replacement for more RAM. Swap space is located on hard drives, which have a slower access time than physical memory.

Multiple choice

The process of putting data into a storage location is called

  1. reading

  2. writing

  3. controlling

  4. handshaking

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A storage medium (media is the plural) is the physical material on which items are kept. A storage device is the computer hardware that records and retrieves items to and from a storage medium. Storage devices can function as sources of input and output. When storage devices transfer items from memory to a storage medium – a process called Writing when putting data into a storage location.

Multiple choice

The term 'Memory' refers to

  1. logic

  2. storage

  3. input devices

  4. output devices

  5. software
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Memory is used to store the all kinds of data. There can be different kinds of memories to store data.

Multiple choice

In which of the following approaches is the sequence of control words corresponding to the control sequence of a machine instruction constitutes the microroutine for that instruction?

  1. Control word

  2. Microroutine

  3. Microprogram memory

  4. Either Control word or Microprogram memory

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is a sequence of control words corresponding to the control sequence of a machine instruction that constitutes the micro routine for that instruction.