COMPUTER SYSTEM ARCHITECTURE MCQS PART 15

COMPUTER SYSTEM ARCHITECTURE MCQS PART 15

1. The addressing mode used in an instruction of the form ADD X Y, is
A. Absolute          
B. indirect            
C. index           
D. none of these
Ans: C

2. _________ register keeps track of the instructions stored in program stored in memory.
A. AR (Address Register)             
B. XR (Index Register)
C. PC (Program Counter)              
D. AC (Accumulator)
Ans: C

3. The idea of cache memory is based ______.
A. on the property of locality of reference
B. on the heuristic 90-10 rule
C. on the fact that references generally tend to cluster
D. all of the above
Ans: A

4. Which of the following is not a weighted code?
A. Decimal Number system             
B. Excess 3-cod
C. Binary number System                
D. None of these
Ans: B

5. The average time required to reach a storage location in memory and obtain
its contents is called the _____.
A. seek time    
B. turnaround time   
C. access time  
D. transfer time
Ans: C

6. (2FAOC)16 is equivalent to _____.
A. (195 084)10    
B. (001011111010 0000 1100)
C. Both A.and B     
D. None of these
Ans: B

7. The circuit used to store one bit of data is known as_______.
A. Register   
B. Encoder     
C. Decoder    
D. Flip Flop
Ans: D

8. . Computers use addressing mode techniques for ____________.
A. giving programming versatility to the user by providing facilities as pointers to memory counters for loop control
B. to reduce no. of bits in the field of instruction
C. specifying rules for modifying or interpreting address field of the instruction   
D. All the above
Ans: D

9. What characteristic of RAM memory makes it not suitable for permanent storage?
A. too slow
B. unreliable 
C. it is volatile
D. too bulky
Ans: C

10. The amount of time required to read a block of data from a disk into memory is composed of seek time, rotational latency, and transfer time. Rotational latency refers to ______.
A. the time its takes for the platter to make a full rotation
B. the time it takes for the read-write head to move into position over the
appropriate track
C. the time it takes for the platter to rotate the correct sector under the head
D. none of the above
Ans: A