Operating System Mcqs

Page No. 18

In the write ahead logging a _____________ is maintained.


aa memory


ba system


ca disk


da log record


View Answer a log record

Write ahead logging is a way ____________


ato ensure atomicity


bto keep data consistent


cthat records data on stable storage


dall of the mentioned


View Answer all of the mentioned

The state of the data accessed by an aborted transaction must be restored to what it was just before the transaction started executing. This restoration is known as ________ of transaction.


asafety


bprotection


croll – back


drevert – back


View Answer roll – back

A terminated transaction that has completed its execution successfully is ____________ otherwise it is __________


acommitted, destroyed


baborted, destroyed


ccommitted, aborted


dnone of the mentioned


View Answer committed, aborted

A collection of instructions that performs a single logical function is called ____________


atransaction


boperation


cfunction


dall of the mentioned


View Answer transaction

To avoid deadlock ____________


athere must be a fixed number of resources to allocate


bresource allocation must be done only once


call deadlocked processes must be aborted


dinversion technique can be used



Which one of the following is a visual ( mathematical ) way to determine the deadlock occurrence?


aresource allocation graph


bstarvation graph


cinversion graph


dnone of the mentioned



A problem encountered in multitasking when a process is perpetually denied necessary resources is called ____________


adeadlock


bstarvation


cinversion


daging


View Answer starvation

For an effective operating system, when to check for deadlock?


aevery time a resource request is made


bat fixed time intervals


cevery time a resource request is made at fixed time intervals


dnone of the mentioned



What is the drawback of banker’s algorithm?


ain advance processes rarely know how much resource they will need


bthe number of processes changes as time progresses


cresource once available can disappear


dall of the mentioned


View Answer all of the mentioned

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