Computer System Organization MCQ (Multiple Choice Questions) || 20 MCQ QUESTION

 Question 1: Assembly language

a. uses alphabetic codes in place of binary numbers used in machine language

b. need not be translated into machine language

c. None of these

d. is the easiest language to write programs

The correct answer is: uses alphabetic codes in place of binary numbers used in machine language

Question 2: Which basic components are used in second generations computers?

a. Integrated Circuit

b. Transistor

c. Vacuum tubes

d. Gates

The correct answer is: Transistor

Question 3: Which of the following is not the instruction code formats of basic computer

a. The register reference instructions

b. A memory-reference instructions

c. The operation code

d. Control reference instructions

The correct answer is: Control reference instructions

Question 4: (2FAOC) 16 is equivalent to

a. Both

b. (001011111010 0000 1100)2

c. None of these

d. (195 084)10

The correct answer is: (001011111010 0000 1100)2

Question 5: In Binary coded decimal format each decimal unit is encoded by

a. 4 bits

b. 2 bits

c. 8 bits

d. 3 bits

The correct answer is: 4 bits

Question 6: The task of the Program Counter (PC) is to

a. None of the above

b. Point to the current instruction that is being executed.

c. Count the total number of instructions in a program.

d. Point to the next instruction to be executed.

The correct answer is: Point to the next instruction to be executed.

Question 7: In the Little-Endian system, the computer stores

a. Most significant byte is stored in lower address

b. All the options are correct

c. Least significant byte is stored in lower address

d. Least significant byte is stored in higher address

The correct answer is: Least significant byte is stored in lower address

Question 8

A processor that has a carry, overflow, and sign flag bits as part of its program status word (PSW) performs addition of the following 2’s complement number 01001101 and 11101001. After the execution of this addition operation, the status of the carry, overflow and sign flags, respectively will be?

a. 1, 0, 1

b. 1, 0, 0

c. 0, 1, 0

d. 1, 1, 0

The correct answer is: 1, 0, 0

Question 9 :What does the data transfer instruction STA stand for?

a. Send Action

b. Store Accumulator

c. Send Accumulator

d. Store Action

The correct answer is: Store Accumulator

Question 10: In the Big-Endian system, the computer stores

a. LSB of data in the lowest memory address of data unit

b. MSB of data in the lowest memory address of data unit

c. MSB of data in the highest memory address of data unit

d. LSB of data in the highest memory address of data unit

The correct answer is: MSB of data in the lowest memory address of data unit

Question 11: What is the role of data bus?

a. To determine number of bits to be transferred at a time.

b. Control of a system

c. Maximum memory capacity of the system

d. To transfer the peripheral address.

The correct answer is: To determine number of bits to be transferred at a time.

Question 12: A Stack-organized Computer uses instruction of

a. Two-addressing

b. Indirect addressing

c. Zero addressing

d. Index addressing

The correct answer is: Zero addressing

Question 13: A special register called Accumulator

a. is used for storing the intermediate results

b. None of the options are correct

c. Both the options are correct

d. is used for storing control flags

The correct answer is: is used for storing the intermediate results

Question 14: Which of the following is not part of the instruction

a. Mode field

b. code field

c. Operation code field

d. Address field

The correct answer is: code field

Question 15: In Assembly language programming, minimum number of operands required for an instruction is/are

a. Zero.

b. Two.

c. One.

d. Three

The correct answer is: Zero.

Question 16: These are used to overcome the difference in data transfer speeds of various devices.

a. Speed enhancing circuitry

b. Bridge circuits

c. Buffer registers

d. Multiple Buses

The correct answer is: Buffer registers

Question 17: What is function of MAR ?

a. Specify an address of memory

b. Store address of next instruction

c. Read/write a word form memory

d. Contains the 8-bit op-code

The correct answer is: Specify an address of memory

Question 18: Give most appropriate answer. There are two representations of 0 in

a. 1's complement

b. 1's complement and Signed Magnitude

c. 2's complement

d. Signed Magnitude

The correct answer is: 1's complement and Signed Magnitude

Question 19: A 16 bit computer that generates 16 bit addresses is capable of addressing up to 2^16 = 64K memory locations.

a. True

b. False

The correct answer is: True

Question 20 : If a instruction is 64 bits in size and the memory is byte addressable then

a. every next instruction is 16 bytes apart

b. every next instruction is 8 bytes apart

c. every next instruction is 18 bytes apart

d. every next instruction is 63 bits apart

The correct answer is: every next instruction is 8 bytes apart