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Welcome to the IO Systems MCQs Page

Dive deep into the fascinating world of IO Systems with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of IO Systems, a crucial aspect of Operating System. In this section, you will encounter a diverse range of MCQs that cover various aspects of IO Systems, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Operating System.

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Check out the MCQs below to embark on an enriching journey through IO Systems. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Operating System.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of IO Systems. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

IO Systems MCQs | Page 4 of 6

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Q31.
The __________ is used by device controllers to request service.

a.

nonmaskable interrupt

b.

blocked interrupt

c.

maskable interrupt

d.

none of the mentioned

Discuss
Answer: (c).maskable interrupt
Q32.
The interrupt vector contains :

a.

the interrupts

b.

the memory addresses of specialized interrupt handlers

c.

the identifiers of interrupts

d.

the device addresses

Discuss
Answer: (b).the memory addresses of specialized interrupt handlers
Q33.
Division by zero, accessing a protected or non existent memory address, or attempting to execute a privileged instruction from user mode are all categorized as ________

a.

errors

b.

exceptions

c.

interrupt handlers

d.

all of the mentioned

Discuss
Answer: (b).exceptions
Q34.
For large data transfers, _________ is used.

a.

dma

b.

programmed I/O

c.

controller register

d.

none of the mentioned

Discuss
Answer: (a).dma
Q35.
A character stream device transfers :

a.

bytes one by one

b.

block of bytes as a unit

c.

with unpredictable response times

d.

none of the mentioned

Discuss
Answer: (a).bytes one by one
Q36.
A block device transfers :

a.

bytes one by one

b.

block of bytes as a unit

c.

with unpredictable response times

d.

none of the mentioned

Discuss
Answer: (b).block of bytes as a unit
Q37.
A dedicated device is :

a.

opposite to a sharable device

b.

same as a sharable device

c.

can be used concurrently by several processes

d.

none of the mentioned

Discuss
Answer: (a).opposite to a sharable device
Q38.
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

Discuss
Answer: (c).character stream
Q39.
In polling :

a.

busy – wait cycles wait for I/O from device

b.

interrupt handler receives interrupts

c.

interrupt-request line is triggered by I/O device

d.

all of the mentioned

Discuss
Answer: (a).busy – wait cycles wait for I/O from device
Q40.
A non blocking system call _________________

a.

halts the execution of the application for an extended time

b.

does not halt the execution of the application

c.

does not block the interrupts

d.

none of the mentioned

Discuss
Answer: (b).does not halt the execution of the application
Page 4 of 6

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