Question Discussion & Solution

MCQ

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

block stream

set of blocks

character stream

none of the mentioned

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When device A has a cable that plugs into device B, and device B has a cable that plugs into device C and device C plugs into a port on the computer, this arrangement is called a _________

port

daisy chain

bus

cable

Discussion

MCQ

A ________ is a full duplex connection between a device driver and a user level process.

Bus

I/O operation

Stream

Flow

Discussion

MCQ

A block device transfers ____________

bytes one by one

block of bytes as a unit

with unpredictable response times

none of the mentioned

Discussion

MCQ

I/O is a _________ in system performance.

major factor

minor factor

does not matter

none of the mentioned

Discussion

MCQ

In a memory mapped input/output __________

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

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

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

the CPU runs a user written code and does accordingly

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category More Operating System Topics

Introduction to Operating System

Types

Services

Structures

Processes

Threads

CPU Scheduling

Process Synchronization

Memory Management

Storage Management

Input Output Systems

Networking

Distributed Operating System

Protection and Security

Unix

Linux

MS Windows

Mixed

Operating Systems Overview

Process Management

Finding and Processing Files

File Management

Report Error

Community Discussion

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Report Error

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