Operating System Mcqs

Page No. 107

What are the characteristics of atomicity?


aAll operations associated are executed to completion or none are performed


bOne processor as coordinator which handles all requests


c When responses are received from all processes, then the process can enter its Critical Section


dUse communication links



What are the advantages of token(with rings) passing approach?
i) One processor as coordinator which handles all requests
ii) No starvation if the ring is unidirectional
iii) There are many messages passed per section entered if few users want to get in section
iv) One processor as coordinator which handles all requests
v) Only one message/entry if everyone wants to get in


ai


bii and iii


ci, ii and iii


di, ii and iv


View Answer i, ii and iv

What are the characteristics of fully distributed approach?
i) When responses are received from all processes, then process can enter its Critical Section
ii) When process exits its critical section, the process sends reply messages to all its deferred requests.
iii) It requires request,reply and release per critical section entry
iv) One processor as coordinator which handles all requests


ai


bi and ii


cii and iii


d iii and iv


View Answer i and ii

What are the characteristics of mutual exclusion using centralized approach?


aOne processor as coordinator which handles all requests


bIt requires request,reply and release per critical section entry


cThe method is free from starvation


dAll of the mentioned


View Answer All of the mentioned

What are the characteristics of tightly coupled system?
i) Different clock
ii) Use communication links
iii) Same clock
iv) Distributed systems


ai


bi and iv


ci, ii and iii


dii, iii and iv


View Answer ii, iii and iv

What are the characteristics of tightly coupled system?
i) Same clock, usually shared memory
ii) Communication is via this shared memory
iii) Multiprocessors
iv) Different clock


ai


bi, ii and ii


cii and iii


di, iii and iv


View Answer i, ii and ii

According to the ring algorithm, links between processes are ____________


abidirectional


bunidirectional


cboth bidirectional and unidirectional


dnone of the mentioned


View Answer unidirectional

In distributed systems, election algorithms assumes that ____________


aa unique priority number is associated with each active process in system


bthere is no priority number associated with any process


cpriority of the processes is not required


dnone of the mentioned



In case of failure, a new transaction coordinator can be elected by ____________


abully algorithm


bring algorithm


cboth bully and ring algorithm


dnone of the mentioned



In distributed systems, what will the transaction coordinator do?


astarts the execution of transaction


bbreaks the transaction into number of sub transactions


ccoordinates the termination of the transaction


dall of the mentioned


View Answer all of the mentioned

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