Operating System Mcqs

Page No. 34

A ________ is a collection of electronics that can operate a port, a bus, or a device.


acontroller


bdriver


chost


dbus


View Answer controller

The _________ present a uniform device-access interface to the I/O subsystem, much as system calls provide a standard interface between the application and the operating system.


aDevices


bBuses


cDevice drivers


dI/O systems


View Answer Device drivers

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 _________


aport


bdaisy chain


cbus


dcable


View Answer daisy chain

A ____ a set of wires and a rigidly defined protocol that specifies a set of messages that can be sent on the wires.


aport


bnode


cbus


dnone of the mentioned


View Answer bus

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


aCPU


bMonitor


cWirefull


dBus


View Answer Bus

An asynchronous call ____________


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


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


cconsumes a lot of time


dis too slow



A non blocking system call _________________


ahalts the execution of the application for an extended time


bdoes not halt the execution of the application


cdoes not block the interrupts


dnone of the mentioned



In polling ____________


abusy – wait cycles wait for I/O from device


binterrupt handler receives interrupts


cinterrupt-request line is triggered by I/O device


dall of the mentioned



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


ablock stream


bset of blocks


ccharacter stream


dnone of the mentioned


View Answer character stream

What is a dedicated device?


aopposite to a sharable device


bsame as a sharable device


ccan be used concurrently by several processes


dnone of the mentioned



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