COMPUTER SYSTEM ARCHITECTURE MCQS PART 13

COMPUTER SYSTEM ARCHITECTURE MCQS PART 13

1. PSW is saved in stack when there is a _____.
A. interrupt recognized        
B. execution of RST instruction
C. Execution of CALL instruction         
D. All of these
Ans: A

2. In computers, subtraction is carried out generally by____.
A. 1's complement method
B. 2's complement method
C. signed magnitude method
D. BCD subtraction method
Ans: B

3. The main memory in a Personal Computer (PC) is made of_____.
A. cache memory.
B. static RAM   
C. Dynamic Ram   
D. both A and B.
Ans: D

4. Cache memory works on the principle of_____.
A. Locality of data
B. Locality of memory
C. Locality of reference
D. Locality of reference & memory
Ans: C

5. An n-bit microprocessor has_____.
A. n-bit program counter
B. n-bit address register
C. n-bit ALU
D. n-bit instruction register
Ans: D

6. When CPU is executing a Program that is part of the Operating System, it is said to be in _____.
A. Interrupt mode
B. System mode  
C. Half mode
D. Simplex mode
Ans: B

7. Logic X-OR operation of (4ACO)H& (B53F)H results _____.
A. AACB        
B. 0000             
C. FFFF          
D. ABCD
Ans: C

8. If the main memory is of 8K bytes and the cache memory is of 2K words. It uses associative mapping. Then each word of cache memory shall be_____.
A. 11 bits
B. 21 bits
C. 16 bits
D. 20 bits
Ans: C

9. A Stack-organized Computer uses instruction of _____.
A. Indirect addressing              
B. Two-addressing
C. Zero addressing                    
D. Index addressing
Ans: C

10. In a program using subroutine call instruction, it is necessary______.
A. initialize program counter          
B. Clear the accumulator
C. Reset the microprocessor           
D. Clear the instruction register
Ans: D