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MCQ

A non blocking system call _________________

halts the execution of the application for an extended time

does not halt the execution of the application

does not block the interrupts

none of the mentioned

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If one or more devices use a common set of wires to communicate with the computer system, the connection is called ______

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Wirefull

Bus

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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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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

Discussion

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

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Introduction to Operating System

Types

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Memory Management

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Input Output Systems

Networking

Distributed Operating System

Protection and Security

Unix

Linux

MS Windows

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Finding and Processing Files

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