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 directories in Linux file system is a mount point for temporary file systems that helps while troubleshooting from CD-ROM where one may possibly mount the root file system and edit configurations?

  1. /opt

  2. /mnt

  3. /media

  4. /home

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

This directory in Linux file system is a mount point for temporary file systems that helps while troubleshooting from CD-ROM where one may possibly mount the root file system and edit configurations.

Multiple choice

FDD stands for

  1. fixed data drive

  2. Fluctuating digital drive

  3. Fixed digital drive

  4. Floppy disk drive
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In computing, FDD stands for Floppy Disk Drive, a device that reads and writes data to removable floppy disks.

Multiple choice

Earliest floppy disks were invented at

  1. HCL

  2. Microsoft Corporation

  3. IBM

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

IBM is credited with developing the first floppy disk in the late 1960s, introducing the 8-inch disk to the market in 1971.

Multiple choice

The average drives have an access time of

  1. 14 - 29 ms

  2. 9 - 14 ms

  3. 60 - 70 ms

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

Average access time for hard disk drives typically ranges from 9 to 14 milliseconds. Values like 60-70 ms are far too slow for standard drives.

Multiple choice

Consider the following program segment for a hypothetical CPU having three user registers Rl R2 and R3. Instruction Operation Instruction Size in word. MOV Rl,5000 ; Rl ¬ Memory[5000] 2 MOV R2,(R1) ; R2 ¬ Memory[(Rl)] ADD R2,R3 ; R2 ¬ R2 + R3 1 MOV 6000, R2 ; Memory[6000] ¬ R2 2 HALT; Machine halts 1 Let the clock cycles required for various operations be as follows. 1 Register to/from memory transfer : 3 clock cycles ADD with both operands in register: 1 clock cycle Instruction fetch and decode : 2 clock cycles per word The total number of clock cycles required to execute the program is

  1. 29

  2. 24

  3. 23

  4. 20
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Instruction fetch/decode: 2 cycles per word. Memory transfer: 3 cycles. ADD: 1 cycle. MOV R1,5000 (2 words): 4 cycles + 3 (mem) = 7. MOV R2,(R1) (1 word): 2 cycles + 3 (mem) = 5. ADD R2,R3 (1 word): 2 cycles + 1 = 3. MOV 6000,R2 (2 words): 4 cycles + 3 (mem) = 7. HALT (1 word): 2 cycles. Total: 7+5+3+7+2 = 24.