Computer Organization & Architecture MCQ [ Set -1 ] | Mcq on Computer Organisation and Architecture

 

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Computer Organization & Architecture MCQ :  1 to 30

1. The basic principle of the von Neumann computer is

A) Storing program and data in separate memory
B) Using pipelining concept
C) Storing both program and data in the same memory
D) Using a large number of registers

ANSWER= (C) Storing both program and data in the same memory

 

2.  SIMD represents an organization that ______________.

A) refers to a computer system capable of processing several programs at the same time.
B) represents organization of single computer containing a control unit, processor unit and a memory unit.
C)  includes many processing units under the supervision of a common control unit
D) none of the above.

ANSWER= (C) includes many processing units under the supervision of a common control unit

 

3. The smallest unit of information a computer can understand and process is known as a

A) Byte
B) Bit
C) Kilobyte
D) Digit

ANSWER= (B) Bit

 

4. In register addressing mode the operand is held in memory. The address of the operand location is held in a register which is specified in instruction.Pipelining strategy is called implement

A) instruction execution
B) instruction prefetch
C) instruction decoding
D) instruction manipulation

ANSWER= (B) instruction prefetch

 

5. From a Source Code, a compiler can detect

A) Run-time error 
B) Logical errors 
C)Syntax error
D) None of these

ANSWER= (C) Syntax error

 

6. ___ offers an economical way to realize temporal parallelism in ___ computers.

A) Pipelining, Super
B) Pipelining, Digital
C) IBM System, Super
D) Evolutional, Digital

ANSWER= (B) Pipelining, Digital

 

7. Which of the following types of memory improves processing by acting as a temporary high-speed holding area between the memory and the CPU?

A)  Flash memory
B) Cache memory
C)  ROM
D) RAM

ANSWER= (B) Cache memory

 

8 How many minimum, NAND gates are required to make a flip-flop?

A) 4
B) 3
C) 2
D) 5

ANSWER= (C) 2

 

9. . _________ register keeps track of the instructions stored in program storedin memory.

A) AR (Address Register)
B) XR (Index Register)
C) PC (Program Counter)
D) AC (Accumulator

ANSWER= (C) PC (Program Counter)

 

10. The basic principle of a Von Neumann computer is

A) storing program and data in separate memory
B) using pipeline concept
C) storing both program and data in the same memory
D) using a large number of register

ANSWER= (C) storing both program and data in the same memory

 

11. What characteristic of RAM memory makes it not suitable for permanentstorage?

A) too slow
B)  unreliable
C) it is volatile
D)  too bulky

ANSWER= (C) it is volatile

 

12.The core element of parallel processing is ___.

A) Data sequencing.
B) CPU’s
C) Instruction execution
D) Printer

ANSWER= (B) CPU’s

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13. The logic circuit in ALU is

A) entirely combinational
B) combinational cum sequential 
C)  entirely sequential
D) none of these

ANSWER= (A) entirely combinational

 

14. A hard disk drive is considered as a  _______  storage.

A) Temporary
B) Flash
C) Non volatile
D) Non-permanent

ANSWER= (C) Non volatile

 

15.  Which of the following is not a universal building block ?

A) 2 input NAND gate
B)  L3 input NAND gate
C) 2 input XOR gate
D) None of the above

ANSWER= (C) 2 input XOR gate

 

16. 11) How many 128 x 8 bit RAMs are required to design 32K X 32 bit RAM?

A) 512
B) 128
C) 1024
D) 32

ANSWER= (C) 1024

 

17. Which memory unit has lowest access time?

A) cache
B) registers
C) magnetic disk
D)  main memory

ANSWER= (B) registers

 

18.  In register addressing mode operands are looked at

A) In cache
B) In secondary storage
C)  In CPU
D)  In primary memory

ANSWER= (C)  In CPU

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19. The Von-Neumann bottleneck is a problem, which occurs due to

A) small size main memory
B) speed disparity between CPU and main memory
C) high speed CPU
D)  malfunctioning of any unit in CPU

ANSWER= (B) speed disparity between CPU and main memory

 

20. The decreased cost and increased performance of computer hardware were the distinguishing features of which generation of computers?

A)  First
B)  Second
C)  Third
D)  Fourth

ANSWER= (D)  Fourth

 

21. When you save to _______your data will remain intact even when the computer is turned off.

A) Primary storage device
B)  Secondary storage device
C) Motherboard
D) TRAM

ANSWER= (B)  Secondary storage device

 

22. Which type of memory holds only that program and data the CPU is presently processing?

A) ASCII
B)  RAM
C) ROM
D)  CMOS

ANSWER= (B)  RAM

 

23. The sum of two octal numbers 12 and 17 would be in octal as

A) 21
B) 23
C) 29
D) 31

ANSWER= (D) 31

 

24. 122. In signed-magnitude binary division, if the dividend is (11100)2 and divisor is(10011)2 then the result is ______.

A) (00100)2
B)(10100)2
C)  (11001)2
D) (01100)2

ANSWER= (B) (10100)2

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25.The sum of two Hexadecimal numbers 23D and 9AA gives the hexadecimal number

A) BE7
B) BE5
C)  BE6
D)  BE4

ANSWER= (A) BE7

 

26. The number of select lines required for a to 1 multiplexer is

A) 1
B) 3
C) 8
D) 256

ANSWER= (C) 8

 

27. Which of the following gates recognizes only words that have an odd number of 1s

A)  NAND
B)  XOR
C) NOR
D) None of these

ANSWER= (B)  XOR

 

28. If even parity mechanism is being used in a system using ASCII code for data transfer, the incorrect receipt data byte is

A) B5
B) 1
C) 2
D) None of these

ANSWER= (B)1

 

29. Any combinational circuit can be implemented by using the following building block

A) AND
B)  NAND
C) OR
D) None of these

ANSWER= (B) NAND

 

30.The circuit used to store one bit of data is known as 

A) Register
B)  Encoder
C) Decoder
D)  Flip-flop

ANSWER= (D)  Flip-flop

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