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MCQ

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

Bus

I/O operation

Stream

Flow

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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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MCQ

Device drivers are implemented to interface ____________

character devices

block devices

network devices

all of the mentioned

Discussion

MCQ

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

non maskable interrupts

blocked interrupts

maskable interrupts

none of the mentioned

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MCQ

Caching is ________ spooling.

same as

not the same as

all of the mentioned

none of the mentioned

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

Banking

Engineering

General

Medical

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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

File Management

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