In this tutorial, we have compiled the most important computer memory organization MCQ questions answers with the best possible necessary explanation.
These multiple-choice questions based on the computer memory can be asked in various competitive examinations like RRB, SSC CGL, IBPS, CDS, and many more.
If you prepare answers to these questions, you can definitely answer the question asked in any competitive examination. So, let’s practice them.
Computer Memory Organization MCQ
1. Which of the following is the smallest entity of memory?
(a) Block
(b) Cell
(c) Instance
(d) Set
Answer: (b) Cell
Explanation: Computer memory is divided into a large number of small parts called cells. Each cell (location) has a unique address, which varies from 0 to memory size – 1.
2. The primary memory (also called main memory) of a personal computer consists of
(a) RAM only
(b) ROM only
(c) Both RAM and ROM
(d) Cache memory
Answer: (c) Both RAM and ROM
3. The Boot sector files of the system are stored in which computer memory?
(a) RAM
(b) ROM
(c) Cache
(d) Register
Answer: (b) ROM
Explanation: ROM stores the program instructions required to initially boot the computer. It only allows reading.
4. Which of the following statements are not correct about the main memory of a computer?
(a) In main memory, data gets lost when power is switched off.
(b) Main memory is faster than secondary memory but slower than registers.
(c) They are made up of semiconductors.
(d) All are correct
Answer: (d) All are correct
5. What is the full form of RAM?
(a) Read Access Memory
(b) Random Access Memory
(c) Readable Access Memory
(d) Random Accumulator Memory
Answer: (b) Random Access Memory
6. What is the full form of ROM?
(a) Read-Only Memory
(b) Random Only Memory
(c) Register Only Memory
(d) Readable Only Memory
Answer: (a) Read-Only Memory
7. RAM is _ _ _ _ _ _ and _ _ _ _ _.
(a) volatile, temporary
(b) non-volatile, temporary
(c) volatile, permanent
(d) non-volatile, permanent
Answer: (a) volatile, temporary
Explanation: RAM is volatile which means its data are lost when the device is powered off.
8. Which of the following memory is non-volatile?
(a) RAM
(b) ROM
(c) Cache
(d) ROM and Cache
Answer: (b) ROM
Explanation: ROM chip is non-volatile, meaning its data is retained even when the device is powered off.
9. Which of the following is the lowest in the computer memory hierarchy?
(a) Cache
(b) RAM
(c) Secondary memory
(d) CPU registers
Answer: (c) Secondary memory
Read Complete Tutorial: What is Memory in Computer
10. Which of the following has the fastest speed in the computer memory hierarchy?
(a) Cache
(b) Register in CPU
(c) Main memory
(d) Disk cache
Answer: (b) Register in CPU
11. Which memory acts as a buffer between CPU and main memory?
(a) RAM
(b) ROM
(c) Cache
(d) Storage
Answer: (c) Cache
Explanation: Cache memory is a small, very high-speed semiconductor memory, which helps to speed up CPU. It is placed as a buffer between the CPU and RAM.
12. Which of the following statements are not correct about cache memory?
(a) Cache memory is used to store data temporarily.
(b) It holds that data and program which has to be executed within a short period of time.
(c) It consumes less access time as compared to the RAM.
(d) All are correct.
Answer: (d) All are correct
13. Which process is used to map logical addresses of variable length onto physical memory?
(a) Paging
(b) Overlays
(c) Segmentation
(d) Paging with segmentation
Answer: (c) Segmentation
Explanation: Segmentation is a process or method in which memory is divided into groups of variable length called segments.
14. Which of the following is used to transfer data between the processor (CPU) and memory?
(a) Cache
(b) TLB
(c) Buffer
(d) Registers
Answer: (d) Registers
Explanation: A processor (CPU) contains several registers to temporarily store data during the program’s execution.
15. Which computer memory chip allows simultaneous both read and write operations?
(a) ROM
(b) RAM
(c) PROM
(d) EEPROM
Answer: (b) RAM
Explanation: RAM is a volatile chip memory that performs both read and write operations. That’s why, it is also called read-write memory (called RWM).
16. In which type of memory, once the program or data is written, it cannot be changed?
(a) EPROM
(b) PROM
(c) EEPROM
(d) None of these
Answer: (b) PROM
Explanation: In Programmable Read-Only Memory (PROM), If there is an error in writing instructions or data, the error cannot be erased. PROM chip becomes unusable.
17. In which type of ROM, data can be erased by ultraviolet light and then reprogrammed by the user or manufacturer?
(a) PROM
(b) EPROM
(c) EEPROM
(d) Both a and b
Answer: (b) EPROM
Explanation: The full form of EPROM is Erasable Programmable Read-Only Memory (EPROM).
18. Which type of ROM is used for erasing purposes only?
(a) PROM
(b) EPROM
(c) EEPROM
(d) Both b and c
Answer: (c) EEPROM
Explanation: EEPROM stands for Electrically Erasable Programmable Read-Only Memory.
19. How many types of RAM are available?
(a) 4
(b) 3
(c) 2
(d) 5
Answer: (c) 2
Explanation: There are two types of Random Access Memory or RAM. They are SRAM (Static RAM) and DRAM (Dynamic RAM).
20. What is the size of the computer accumulator register?
(a) 4 bit
(b) 4KB
(c) 4 bytes
(d) 8 bytes
Answer: (c) 4 bytes
21. Which of the following is an example of solid-state storage device?
(a) Hard Drive
(b) CD
(c) DVD
(d) USB Flash Drive
Answer: (d) USB Flash Drive
22. Which of the following is an example of volatile memory?
(a) Hard Driver
(b) RAM
(c) PROM
(d) Floppy Disk
Answer: (b) RAM
23. The smallest unit of measuring data in the computer is
(a) Byte
(b) Kilobyte
(c) Nibble
(d) Bit
Answer: (d) Bit
24. What happens when RAM is full in the computer?
(a) Cache memory is used
(b) The volatile memory is used
(c) An interrupt is raised
(d) Hard disk is used
Answer: (b) The volatile memory is used
25. Which of the following is primary memory (or main memory)?
(a) RAM
(b) ROM
(c) Secondary memory (also called auxiliary memory)
(d) Both a and b
Answer: (d) Both a and b
26. The computer internal memory consists of
(a) Cache memory, registers
(b) CPU registers, main memory, cache memory
(c) Main memory, secondary memory
(d) Virtual memory, cache memory
Answer: (b) CPU registers, main memory, cache memory
27. Main memory (also called primary memory) store(s)
(a) Data alone
(b) Program alone
(c) Results alone
(d) All
Answer: (d) All
28. Primary storage is . . . . . . . as compared to secondary storage.
(a) Slow and inexpensive
(b) Fast and inexpensive
(c) Fast and expensive
(d) Slow and expensive
Answer: (c) Fast and expensive
29. Storage that stores or retains data/information permanently after power off is called
(a) Volatile storage
(b) Non-volatile storage
(c) Sequential storage
(d) Both a and b
Answer: (b) Non-volatile storage
30. Which of the following statement is true about secondary memory (auxiliary memory)?
(a) Secondary memory is non-volatile in nature that is slower than primary memories.
(b) It is also known as backup memory.
(c) Data is permanently stored even if power is switched off.
(d) Computer may run without secondary memory.
(e) All are correct
Answer: (e) All are correct
31. Which of the following is/are examples of non-volatile storage?
(a) Magnetic disks
(b) USB flash drive and Memory card
(c) Hard Drive
(d) All
Answer: (d) All
32. The process of dividing the disk into tracks and sectors is called
(a) Tracking
(b) Crashing
(c) Dicing
(d) Formatting
Answer: (d) Formatting
33. The main memory of a personal computer can also be called
(a) Primary storage
(b) Internal memory
(c) Primary memory
(d) All of these
Answer: (d) All of these
34. Cache loses its information when the power is off. This is because cache memory is
(a) Dynamic in nature
(b) Static in nature
(c) Volatile in nature
(d) Non-volatile in nature
Answer: (c) Volatile in nature
35. Which of the following can be used as main memory?
(a) Compact disk
(b) Magnetic disk
(c) Hard disk
(d) None of these
Answer: (d) None of these
36. How can you measure the speed of RAM?
(a) Capacity
(b) Bus width
(c) Bus speed
(d) Both b and c
Answer: (d) Both b and c
37. RAM is volatile in nature because
(a) It can be used for both reading and writing operations.
(b) By which we can access from any location.
(c) It must need power supply continuously to retain data.
(d) It does not need power supply continuously.
Answer: (c) It must need power supply continuously to retain data.
38. Which of the following memory uses flip flop component?
(a) DRAM
(b) SRAM
(c) ROM
(d) SDRAM
Answer: (b) SRAM
39. In which of the following transistor and capacitor is used?
(a) SRAM
(b) DRAM
(c) SDRAM
(d) Both b and c
Answer: (b) DRAM
40. Which type of RAM can be used as cache memory?
(a) SRAM
(b) DRAM
(c) SDRAM
(d) Both a and b
Answer: (a) SRAM
41. Which of the following statement is/are true about static RAM?
(a) In static RAM, data is stored in flip flop.
(b) It does not need to be refreshed periodically.
(c) It is faster than dynamic RAM.
(d) All of these are true.
Answer: (d) All of these are true.
42. Which of the following statement is false about dynamic RAM?
(a) DRAM needs a continuously refreshed memory to store data.
(b) It is slower than SRAM.
(c) It is more expensive than SRAM.
(d) All are correct.
Answer: (c) It is more expensive than SRAM
43. Which of the following chips stores the basic input-output system (BIOS)?
(a) RAM
(b) ROM
(c) PROM
(d) None of these
Answer: (b) ROM
44. Which of the following is not RAM?
(a) SRAM
(b) DRAM
(c) WRAM and VRAM
(d) PRAM
Answer: (d) PRAM
45. SDRAM stands for
(a) Static DRAM
(b) Synchronous DRAM
(c) Super DRAM
(d) Semi DRAM
Answer: (b) Synchronous DRAM
46. Which of the following memories needs refresh to store information?
(a) Cache
(b) SRAM
(c) DRAM
(d) All of these
Answer: (c) DRAM
47. Which of the following is “built-in memory” in the computer?
(a) RAM
(b) ROM
(c) LSI
(d) VLSI
Answer: (b) ROM
Explanation: ROM is also known as permanent memory.
48. EPROM is used for
(a) Erasing the data of ROM
(b) Reconstructing data of ROM
(c) Duplicating ROM
(d) Erasing and reconstructing data of ROM
Answer: (d) Erasing and reconstructing data of ROM
49. EPROM is generally erased by
(a) Infrared rays
(b) Ultraviolet rays
(c) Electromagnetic signal
(d) 12V electrical pulse
Answer: (b) Ultraviolet rays
50. Virtual memory is an
(a) extremely large memory
(b) extremely large secondary memory
(c) illusion of an extremely large memory
(d) a type of memory used in supercomputers.
Answer: (c) illusion of an extremely large memory
51. The technique that extends storage capacities of the main memory beyond the actual size of the main memory is known as
(a) multitasking
(b) multiprocessing
(c) virtual storage
(d) multiprogramming
Answer: (c) virtual storage
52. USB stands for
(a) Uniform Service Bus
(b) Universal Serial Bus
(c) Universal Serial Buffer
(d) Universal Sector Bus
Answer: (b) Universal Serial Bus
53. The memory that cannot be accessed directly by processor (CPU) is
(a) internal memory
(b) external memory
(c) cache memory
(d) system memory
Answer: (b) external memory
54. In which storage medium, we can store the maximum amount of data
(a) Magnetic storage
(b) Optical storage
(c) Solid data storage
(d) Storage capacity
Answer: (d) Storage capacity
55. Which of the following memories has the fastest (or shortest) access time?
(a) RAM
(b) ROM
(c) Cache memory
(d) Magnetic core memory
Answer: (c) Cache memory
56. Why do we use cache memory between CPU and main memory?
(a) to increase the internal memory of computer system
(b) to reduce the memory access and cycle time
(c) to store data and programs that can be executed within a short period of time
(d) Both a and b
Answer: (d) Both a and b
57. The advantages of using secondary memory storage in a personal computer are
(a) very high storage capacity
(b) permanent storage (non-volatile)
(c) stores data that are not currently being used by CPU
(d) All of these
Answer: (d) All of these
58. Hard disk can be formatted at the time of
(a) RAM
(b) Booting
(c) disk reader
(d) None of these
Answer: (b) Booting
59. Which of the following memory storage is slow?
(a) Magnetic disc
(b) RAM
(c) Hard disk
(d) Optical disk
Answer: (d) Optical disk
60. The key feature of dynamic RAM is
(a) It is less expensive and cheaper than static RAM
(b) It is faster than SRAM
(c) It is bigger in size than SRAM
(d) It requires less power than static RAM
Answer: (a) It is less expensive and cheaper than static RAM
61. Higher the RAM of computer, the faster its processing speed. Since it eliminates
(a) need for external memory
(b) need for ROM
(c) need for cache memory
(d) All of these
Answer: (a) need for external memory
62. Which of the following is the feature of SRAM?
(a) It is faster than DRAM
(b) It is bigger in size and more expensive than DRAM
(c) it requires less power consumption
(d) All of these
Answer: (d) All of these
Hope that these computer memory organization MCQ questions would help you to crack the competitive examinations like SSC CGL, IBPS, RRB, Group D, CDS, and many more. I hope that you will have practiced these important multiple-choice questions based on computer memory organization.
All the best!
