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Q.

The ________ can be turned off by the CPU before the execution of critical instruction sequences that must not be interrupted.

A

nonmaskable interrupt

B

blocked interrupt

C

maskable interrupt

D

none of the mentioned

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MCQ

1.

The _________ are reserved for events such as unrecoverable memory errors.

A

non maskable interrupts

B

blocked interrupts

C

maskable interrupts

D

none of the mentioned

Discussion

MCQ

2.

In an interrupt driven input/output __________

A

the CPU uses polling to watch the control bit constantly, looping to see if a device is ready

B

the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available

C

the CPU receives an interrupt when the device is ready for the next byte

D

the CPU runs a user written code and does accordingly

Discussion

MCQ

3.

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

Discussion

MCQ

4.

A keyboard is an example of a device that is accessed through a __________ interface.

A

block stream

B

set of blocks

C

character stream

D

none of the mentioned

Discussion

MCQ

5.

The kernel data structures include ____________

A

process table

B

open file table

C

close file table

D

all of the mentioned

Discussion

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