COMPUTER SYSTEM ARCHITECTURE MCQS PART 84

COMPUTER SYSTEM ARCHITECTURE MCQS PART 84

1. Which are 4 types of commands received by an interface:
a. Control, status, data output, data input    
b. Only data input
c. Control, flag, data output, address arbitration
d. Data input, data output, status bit, decoder
ANSWER A

2. Two ways in which computer buses can communicate with memory in case of I/O devices by using:
a. Separate buses for memory and I/O device
b. Common bus for memory and I/O device 
c. both a & b
d. none of these
ANSWER C

3. There are 2 ways in which addressing can be done in memory and I/O device:
a. Isolated I/O    
b. Memory-mapped I/O
c. Both a & b
d. None of these
ANSWER C

4. Advantages of isolated I/O are:
a. Commonly usable   
b. Small number of I/O instructions
c. Both a & b               
d. None of these
ANSWER C

5. In _______ addressing technique separate address space is used for both memory and I/O device:
a. Memory-mapped I/O   
b. Isolated I/O    
c. Both a & b   
d. None of these
ANSWER B

6. _______is a single address space for storing both memory and I/O devices:
a. Memory-mapped I/O 
b. Isolated I/O 
c. Separate I/O
d. Optimum I/O
ANSWER A
7. Following are the disadvantages of memory mappedI/O are:
a. Valuable memory address space used up
b. I/O module register treated as memory addresses
c. Same machine intersection used to access both memory and I/O device
d. All of these
ANSWER D

8. Who determine the address of I/O interface:
a. Register select    
b. Chip select    
c. Both a & b   
d. None of these
ANSWER C

9. 2 control lines in I/O interface is:
a. RD, WR         
b. RD,DATA           
c. WR, DATA      
d. RD, MEMORY
ANSWER A

10. In I/O interface RS1 and RS0 are used for selecting:
a. Memory      
b. Register         
c. CPU       
d. Buffer
ANSWER B