Distributed Operating System Questions

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41.

What is the coherency of replicated data?

A

All replicas are identical at all times

B

Replicas are perceived as identical only at some points in time

C

Users always read the most recent data in the replicas

D

All of the mentioned

Correct Answer: D

None.

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42.

What are the three popular semantic modes?

A

Unix, Coherent & Session semantics

B

Unix, Transaction & Session semantics

C

Coherent, Transaction & Session semantics

D

Session, Coherent semantics

Correct Answer: B

None.

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43.

______ of the distributed file system are dispersed among various machines of distributed system.

A

Clients

B

Servers

C

Storage devices

D

All of the mentioned

Correct Answer: D

None.

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44.

_______ is not possible in distributed file system.

A

File replication

B

Migration

C

Client interface

D

Remote access

Correct Answer: B

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45.

Which one of the following hides the location where in the network the file is stored?

A

transparent distributed file system

B

hidden distributed file system

C

escaped distribution file system

D

spy distributed file system

Correct Answer: A

None.

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46.

In a distributed file system, when a file

A

file name need to be changed

B

file name need not to be changed

C

file

D

file

Correct Answer: B

None.

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47.

In a distributed file system, _______ is mapping between logical and physical objects.

A

client interfacing

B

naming

C

migration

D

heterogeneity

Correct Answer: B

None.

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48.

In a distributed file system, a file is uniquely identified by ___________

A

host name

B

local name

C

the combination of host name and local name

D

none of the mentioned

Correct Answer: C

None.

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49.

There is no need to establish and terminate a connection through open and close operation in ___________

A

stateless file service

B

stateful file service

C

both stateless and stateful file service

D

none of the mentioned

Correct Answer: A

None.

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50.

In distributed file system, file name does not reveal the file

A

local name

B

physical storage location

C

both local name and physical storage location

D

none of the mentioned

Correct Answer: B

None.

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