Distributed Operating System Questions

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61.

What are the disadvantages of majority protocol?

A

Complicated implementation

B

Deadlock cannot occur easily

C

Bottleneck

D

All of the mentioned

Correct Answer: A

None.

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62.

What are the parts of a global unique identifier?

A

Local unique timestamp

B

Remote timestamp

C

Clock number

D

All of the mentioned

Correct Answer: A

None.

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63.

Which are the two complementary deadlock-prevention schemes using timestamps?

A

The wait & wound-wait scheme

B

The wait-n-watch scheme

C

The wound-wait scheme

D

The wait-wound & wound-wait scheme

Correct Answer: A

None.

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64.

In distributed systems, a logical clock is associated with ______________

A

each instruction

B

each process

C

each register

D

none of the mentioned

Correct Answer: B

None.

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65.

If timestamps of two events are same, then the events are ____________

A

concurrent

B

non-concurrent

C

monotonic

D

non-monotonic

Correct Answer: A

None.

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66.

If a process is executing in its critical section ____________

A

any other process can also execute in its critical section

B

no other process can execute in its critical section

C

one more process can execute in its critical section

D

none of the mentioned

Correct Answer: B

None.

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67.

A process can enter into its critical section ____________

A

anytime

B

when it receives a reply message from its parent process

C

when it receives a reply message from all other processes in the system

D

none of the mentioned

Correct Answer: C

None.

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68.

For proper synchronization in distributed systems ____________

A

prevention from the deadlock is must

B

prevention from the starvation is must

C

prevention from the deadlock & starvation is must

D

none of the mentioned

Correct Answer: C

None.

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69.

In the token passing approach of distributed systems, processes are organized in a ring structure ____________

A

logically

B

physically

C

both logically and physically

D

none of the mentioned

Correct Answer: A

None.

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70.

In distributed systems, what will the transaction coordinator do?

A

starts the execution of transaction

B

breaks the transaction into number of sub transactions

C

coordinates the termination of the transaction

D

all of the mentioned

Correct Answer: D

None.

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