I/O System – Kernel I/O Subsystems MCQ’s

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This set of Operating System Multiple Choice Questions & Answers (MCQs) focuses on “I/O System – Kernel I/O Subsystems”.

1. Caching is ________ spooling.
a) same as
b) not the same as
c) all of the mentioned
d) none of the mentioned

2. Caching ____________
a) holds a copy of the data
b) is fast memory
c) holds the only copy of the data
d) holds output for a device

3. Buffering is done to ____________
a) cope with device speed mismatch
b) cope with device transfer size mismatch
c) maintain copy semantics
d) all of the mentioned

4. Spooling ____________
a) holds a copy of the data
b) is fast memory
c) holds the only copy of the data
d) holds output for a device

5. The kernel data structures include ____________
a) process table
b) open file table
c) close file table
d) all of the mentioned

6. A ________ is a full duplex connection between a device driver and a user level process.
a) Bus
b) I/O operation
c) Stream
d) Flow

7. The ________ keeps state information about the use of I/O components.
a) CPU
b) OS
c) kernel
d) shell

8. Windows NT uses a __________ implementation for I/O.
a) message – passing
b) draft – passing
c) secondary memory
d) cache

9. I/O is a _________ in system performance.
a) major factor
b) minor factor
c) does not matter
d) none of the mentioned

10. If the number of cycles spent busy – waiting is not excessive, then ____________
a) interrupt driven I/O is more efficient than programmed I/O
b) programmed I/O is more efficient than interrupt driven I/O
c) both programmed and interrupt driven I/O are equally efficient
d) none of the mentioned

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