Computer Knowledge

Computer Memory and Storage

2,121 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

Memory allocation at the run time is known as

  1. Static memory allocation

  2. Dynamic memory allocation

  3. Paging

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

Dynamic memory allocation occurs during runtime when programs request memory using functions like malloc() or new. Static allocation is fixed at compile time and cannot change during execution.

Multiple choice

Memory allocation at the compile time is known as

  1. Static memory allocation

  2. Dynamic memory allocation

  3. Paging

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Static memory allocation is fixed at compile time. The compiler determines memory requirements before the program runs, allocating space on the stack for global and local variables.

Multiple choice

Which of the following function is performed by prefetch unit of CPU?

  1. Built into the CPU and are used to temporarily hold the data, addresses, and instructions being passed around between the CPU’s components.

  2. Decodes incoming instructions to their simplest form.

  3. Supervises the transfer of data over the bus system between the other components of the computer and the CPU.

  4. Handles the addressing and cataloging of where data is stored in system memory.

  5. This unit preloads the instruction registers of the CPU with instructions from memory whenever the BIU is idle.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The prefetch unit perform this task.

Multiple choice

Which of the following statements is incorrect about RAM?

  1. RAM stands for Random access memory.

  2. RAM is a non-volatile memory.

  3. RAM stores data temporarily.

  4. It has higher capacity (Mbytes), cheaper and slower than Caché.

  5. RAM is a group of integrated circuits (ICs or chips) that contain small electronic components (called capacitors) that store binary 1s and 0s.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is an incorrect statement about RAM. RAM is volatile memory, i.e. it looses data when turned off.

Multiple choice

Which of the following is incorrect about CD?

  1. CD stands for compact disk.

  2. The capacity of CD is 640 MB.

  3. The recording time of CD is 74 minutes.

  4. The transfer rate of a CD is 9.6 Mbps.

  5. The maximum sampling rate of CD is 44.1 kHZ.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

It is an incorrect statement about CD. Since the transfer rate of a CD is 1.4 Mbps, 9.6 Mbps is the transfer rate of DVD.

Multiple choice

The type of memory mapping in cache where the cache consists of normal high speed random access memory and each location in the cache holds the data is _____________.

  1. II set-associative mapping

  2. I direct mapping

  3. III sector mapping

  4. fully associative mapping

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

This type of memory mapping in cache is the one in which the cache consists of normal high speed random access memory and each location in the cache holds the data.