Question Discussion & Solution

MCQ

When hardware is accessed by reading and writing to the specific memory locations, then it is called ____________

port-mapped I/O

controller-mapped I/O

bus-mapped I/O

none of the mentioned

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MCQ

What is an interrupt vector?

It is an address that is indexed to an interrupt handler

It is a unique device number that is indexed by an address

It is a unique identity given to an interrupt

None of the mentioned

Discussion

MCQ

If the number of cycles spent busy - waiting is not excessive, then ____________

interrupt driven I/O is more efficient than programmed I/O

programmed I/O is more efficient than interrupt driven I/O

both programmed and interrupt driven I/O are equally efficient

none of the mentioned

Discussion

MCQ

A process is moved to wait queue when I/O request is made with ____________

non-blocking I/O

blocking I/O

asynchronous I/O

synchronous I/O

Discussion

MCQ

Buffering is done to ____________

cope with device speed mismatch

cope with device transfer size mismatch

maintain copy semantics

all of the mentioned

Discussion

MCQ

An asynchronous call ____________

returns immediately, without waiting for the I/O to complete

does not return immediately and waits for the I/O to complete

consumes a lot of time

is too slow

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Introduction to Operating System

Types

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Structures

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Process Synchronization

Memory Management

Storage Management

Input Output Systems

Networking

Distributed Operating System

Protection and Security

Unix

Linux

MS Windows

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Operating Systems Overview

Process Management

Finding and Processing Files

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