Operating System Mcqs

Page No. 21

The Banker’s algorithm is _____________ than the resource allocation graph algorithm.


aless efficient

✓


bmore efficient

✖


cequal

✖


dnone of the mentioned

✖


View Answer less efficient

The resource allocation graph is not applicable to a resource allocation system ____________


awith multiple instances of each resource type

✓


bwith a single instance of each resource type

✖


csingle & multiple instances of each resource type

✖


dnone of the mentioned

✖



If no cycle exists in the resource allocation graph ____________


athen the system will not be in a safe state

✖


bthen the system will be in a safe state

✓


call of the mentioned

✖


dnone of the mentioned

✖



All unsafe states are ____________


adeadlocks

✖


bnot deadlocks

✓


cfatal

✖


dnone of the mentioned

✖


View Answer not deadlocks

A system is in a safe state only if there exists a ____________


asafe allocation

✖


bsafe resource

✖


csafe sequence

✓


dall of the mentioned

✖


View Answer safe sequence

A state is safe, if ____________


athe system does not crash due to deadlock occurrence

✖


bthe system can allocate resources to each process in some order and still avoid a deadlock

✓


cthe state keeps the system protected and safe

✖


dall of the mentioned

✖



A deadlock avoidance algorithm dynamically examines the __________ to ensure that a circular wait condition can never exist.


aresource allocation state

✓


bsystem storage state

✖


coperating system

✖


dresources

✖



Given a priori information about the ________ number of resources of each type that maybe requested for each process, it is possible to construct an algorithm that ensures that the system will never enter a deadlock state.


aminimum

✖


baverage

✖


cmaximum

✓


dapproximate

✖


View Answer maximum

Each request requires that the system consider the _____________ to decide whether the current request can be satisfied or must wait to avoid a future possible deadlock.


aresources currently available

✓


bprocesses that have previously been in the system

✖


cresources currently allocated to each process

✖


dfuture requests and releases of each process

✖



‘m’ processes share ‘n’ resources of the same type. The maximum need of each process doesn’t exceed ‘n’ and the sum of all their maximum needs is always less than m+n. In this setup, deadlock ____________


acan never occur

✓


bmay occur

✖


chas to occur

✖


dnone of the mentioned

✖


View Answer can never occur

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