Distributed Operating System Questions

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51.

Which one of the following is a distributed file system?

A

andrew file system

B

network file system

C

novel network

D

all of the mentioned

Correct Answer: D

None.

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52.

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

A

i

B

i, ii and ii

C

ii and iii

D

i, iii and iv

Correct Answer: B

None.

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53.

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

A

i

B

i and iv

C

i, ii and iii

D

ii, iii and iv

Correct Answer: D

None.

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54.

What are the characteristics of mutual exclusion using centralized approach?

A

One processor as coordinator which handles all requests

B

It requires request,reply and release per critical section entry

C

The method is free from starvation

D

All of the mentioned

Correct Answer: D

None.

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55.

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

A

i

B

i and ii

C

ii and iii

D

iii and iv

Correct Answer: B

None.

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56.

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

A

i

B

ii and iii

C

i, ii and iii

D

i, ii and iv

Correct Answer: D

None.

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57.

What are the characteristics of atomicity?

A

All operations associated are executed to completion or none are performed

B

One processor as coordinator which handles all requests

C

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

D

Use communication links

Correct Answer: A

None.

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58.

What things are the transaction coordinator is responsible for?

A

Starting the execution of the transaction

B

Breaking transaction into a number of subtransactions

C

Coordinating the termination of the transaction

D

All of the mentioned

Correct Answer: D

None.

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59.

Which of the following advantages follows the single coordinator approach?

A

Simple implementation

B

Simple deadlock handling

C

bottleneck

D

All of the mentioned

Correct Answer: D

None.

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60.

Which of the following disadvantages follows the single coordinator approach?

A

Bottleneck

B

Slow response

C

Deadlock

D

One request per second

Correct Answer: A

None.

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