Operating system questions answers io subsystem

 

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Operating system questions answers io subsystem

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Question 6
When hardware is accessed by reading and writing to the specific memory locations, then it is called .....
A
port-mapped I/O
B
controller-mapped I/O
C
bus-mapped I/O
D
none of the mentioned
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Question 6 Explanation: 
It is called memory-mapped I/O.
Question 7
A process is moved to wait queue when I/O request is made with .....
A
non-blocking I/O
B
blocking I/O
C
asynchronous I/O
D
synchronous I/O
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Question 8
Which hardware triggers some operation after certain programmed count?
A
programmable interval timer
B
interrupt timer
C
programmable timer
D
none of the mentioned
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Question 9
The data-in register of I/O port is .....
A
Read by host to get input
B
Read by controller to get input
C
Written by host to send output
D
Written by host to start a command
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Question 10
The device-status table contains .....
A
each I/O device type
B
each I/O device address
C
each I/O device state
D
all of the mentioned
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There are 10 questions to complete.

 

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