  # Computer Organization and Architecture Basics MCQs with Answers

## Computer Organization and Architecture Basics MCQs with Answers. This mcqs most helpful in SPPU exam 2020 and in other Inportant Exams.

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1. What are the characteristics of Harvard Architecture?
a. It uses store program concept
b. It stores the program and data in separate memory
c. It improves the bandwidth
d. All of these

Ans - D

2. What will be the result of Booth recoding operation on 101100?
a. -1-10-100
b. -1+10-100
c. 1-1+1000
d. +10-10+1+1

Ans - B

3. What are the characteristics of ENIAC computer?
a. It is decimal computer.
c. It has 20 accumulators
d. All of these

Ans - D

4. Which kind of architecture is used in EDVAC?
a. Harvard
b. Von Neumann
c. Both of these
d. None of these

Ans - B

5. What version of multiplicand will be selected if consecutive multiplier bits are 01?
a. 0*M
b. +1*M
c. -1*M
d. -2*M

Ans - B

6. What will be the result of Booth recoding operation on 101100?
a. -1-10-100
b. -1+10-100
c. 1-1+1000
d. +10-10+1+1

Ans - B

7. What is the significance of address bus?
a. To determine number of bits to be transferred at a time
b. Maximum memory capacity of the system
c. To transfer the peripheral address
d. Both b and c

Ans - D

8. Which representation gives two representations for zero?
a. 1’s complement
b. Sign Magnitude
c. 2’s complement
d. Both b and c

Ans - D

9. Which instruction has all implicit addresses?

Ans - C

10. In Booth’s algorithm, if Q0=1 and Q-1=0 then it will perform which operation
a. A=A-M
b. A=A+M
c. Arithmetic right shift of A, Q and Q-1
d. A=M-A

Ans - A

11. What will be the result of Booth recoding operation on 101100??
a. -1-10-100
b. -1+10-100
c. 1-1+1000
d. +10-10+1+1

Ans - B

12. Which register is useful to hold temporarily the right-hand instruction from a word in memory?
a. IR
b. PC
c. IBR
d. Memory

Ans - C

13. Which bit represents the sign of a number in sign magnitude representation?
a. MSB
b. LSB
c. Both
d. None of these

Ans - A

14. In Booth's recoding, M is multiplicand and -1 is booth recoded multiplier, then what will be the result of multiplication?
a. 1’s complement of M
b. 2’s complement of M
c. M
d. Right shift of M

Ans - B

15. What is function of IR ?
a. Read/write a word form memory
b. Specify an address from memory
c. Contains the 8-bit op-code
d. Store address of next instruction

Ans - C

16. Which basic components are used in second generations’ computers?
a. Vacuum tubes
b. Transistor
c. Integrated Circuit
d. Gates

Ans - B

17. What types of memories are used in third generation computers?
a. Magnetic core memories
b. Semiconductor memories
c. Optical memories
d. All of these

Ans - B

18. What is the significance of control bus?
a. To determine number of bits to be transferred at a time.
b. Maximum memory capacity of the system
c. To transfer the peripheral address
d. To generate and transfer the control signals

Ans - D

19. Which are the basic data types of computer
a. Fixed and floating point numbers
b. Fixed, Floating and Character
c. Floating and Character
d. None of these

Ans - A

20. Which representation is commonly used by computer?
a. Sign Magnitude representation
b. 1’s complement representation
c. 2’s complement representation
d. 9’s complement representation

Ans - C

21. What is long form of ENIAC ?
a. Electronic Discrete Variable computer
b. Electrical number integar and complex
c.  Electronic Numerical Integrator and computer
d. None

Ans - C

22. Which kind of number system is used by ENIAC ?
a. Decimal
b. Binary
c. Hex
d. Octal

Ans - A

23. How many number of accumulators are used in ENIAC ?
a. 10
b. 20
c. 30
d. 40

Ans - b

24. Stored program concept is introduced in which type of architecture ?
a. Harvard
b. Von Neumann
c. Von Neumann
d. None of these

Ans - B

25. What is the long form of IAS ?
b. Industrial Architectural Standard
c. Information Assurance System

Ans - A

26. Which architecture stores program and data in main memory?
a. HArvard
b. Von Neumann
c. Both
d. None

Ans - B

27. Which kind of number system is used by IAS  ?
a. Decimal
b. Binary
c. Hex
d. Octal

Ans - B

28. What is a size of word in IAS ?
a. 10
b. 20
c. 30
d. 40

Ans - D

29. How many words are present in IAS ?
a. 1000
b. 200
c. 2000
d. 100

Ans - A

30. What is the size of IAS instructions
a. 30 bits
b. 20 bits
c. 10 bits
d. 5 bits

Ans - B