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MCQ

The hardware mechanism that allows a device to notify the CPU is called _______

polling

interrupt

driver

controlling

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

block stream

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character stream

none of the mentioned

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The ______ register is read by the host to get input.

flow in

flow out

data in

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

Bus

I/O operation

Stream

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The CPU hardware has a wire called __________ that the CPU senses after executing every instruction.

interrupt request line

interrupt bus

interrupt receive line

interrupt sense line

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In a programmed input/output(PIO) __________

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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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

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