Central Processing Unit CPU MCQ Questions and Answers for Practice

1. ..............have been developed specifically for pipelined systems.

1. Utility software
2. Speed up utilities
3. Optimizing compilers
4. None of the mentioned

2. A machine language instruction format consists of

1. Operand field
2. Operation code field
3. Operation code field & operand field
4. none of the mentioned

3. Auto index addressing mode is used for

1. addressing local variables of functions
2. Accessing variables such as arrays
3. For holding pointer to structure of array
4. For Push, Pop operation on stack

4. Branch instruction 'JUMP IF ZERO' is an example of

1. unconditional branch
2. arithmetic branch
3. transferring branch
4. conditional branch

5. Branch instruction 'JUMP TO SUBORDINATE' is an example of

1. unconditional branch
2. arithmetic branch
3. transferring branch
4. conditional branch

6. Condition used for branching instruction is

1. Negative
2. zero
3. Overflow
4. all of these

7. Condition used for branching instruction is

1. Carry
2. zero
3. Overflow
4. all of these

8. Conditional branching instructions are implemented with the help of

1. Status flags
2. condition
3. status word
4. branch

9. Data registers are used to hold

1. data
2. address
3. both a & b
4. none of these

10. Direct addressing mode is used for

1. Initialization of variables
2. for global variables
3. addressing local variables of functions
4. Accessing variables such as arrays

11. Each stage in pipelining should be completed within.......cycle.

1. 1
2. 2
3. 3
4. 4

12. General purpose registers are used to

1. hold oprands of an instruction
2. for addressing purpose
3. both a & b
4. none of these

13. Halt instruction is a type of

1. Data transfer
2. Arithematic & Logical
3. Miscellaneous
4. Control transfer instruction

14. Identify control & status registers

1. PC
2. IR
3. MAR
4. all of these

15. If a unit completes its task before the allotted time period, then

1. It’ll perform some other task in the remaining time
2. Its time gets reallocated to a different task
3. It’ll remain idle for the remaining time
4. None of the mentioned