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

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.

Multiple choice

Directions: In the following question, find out the alternative which will replace the blank.

Video: Cassette :: Computer: _________

  1. Edit

  2. Files

  3. Compact disc

  4. Bytes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The relationship is content:storage medium. Videos are commonly stored on cassettes (like VHS tapes). Similarly, computer data and software are commonly stored on compact discs (CDs). The other options (edit, files, bytes) are related to computers but not storage media like cassettes are for videos.

Multiple choice

Which of the following is a false statement about 'Memory Resident' attack during Penetration test?

  1. This attack is used to prevent the inspect memory.

  2. The attacker checks the memory available to exploit the system.

  3. In this attack, the information of the application can be hidden within a process that would normally be trusted in nature.

  4. This attack is visible during scanning and identification of malicious software in the system.

  5. This attack occurs during writing to disk.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In this attack, the information of the application can not be hidden within a process. This is possible in 'Process Injection' attack.

Multiple choice

The memory allocation scheme subject to 'external fragmentation' is

  1. segmentation

  2. swapping

  3. pure demand paging

  4. multiple contiguous fixed partition
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Segmentation divides memory into variable-sized segments, leading to external fragmentation when unused gaps develop between segments. Swapping moves processes in and out of memory, pure demand paging loads pages only when needed, and fixed partitions have internal fragmentation.

Multiple choice

Blocks of buffer caches are used

  1. to improve the disk performance

  2. to handle interrupts

  3. to increase the capacity of main memory

  4. to speed up memory read operation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Buffer caches improve disk performance by reducing disk accesses - frequently used data stays in memory. They don't handle interrupts, increase main memory capacity, or speed up general memory reads.

Multiple choice

Which of the following is/are the problem(s) of file management system?

  1. Lack of data independence

  2. Data redundancy

  3. Update

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

File management systems suffer from all these problems: lack of data independence (programs depend on physical file structure), data redundancy (same data stored in multiple files), and update anomalies (changes must be made in multiple places leading to inconsistencies). DBMS was developed specifically to address these issues.

Multiple choice

Embedded pointers provide

  1. an inverted index

  2. a secondary access path

  3. a physical record key

  4. all of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Embedded pointers stored within records create additional access paths to related data, serving as secondary indexes. Option A describes inverted indexes which are separate structures. Option C refers to primary keys, not embedded pointers.