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Distributed File System - 2 - Operating System Questions & Answers

1.

What is a stateless file server?

   A.) It keeps tracks of states of different objects
   B.) It maintains internally no state information at all
   C.) It maintains some information in them
   D.) None of the mentioned

Answer: Option 'B'

​It maintains internally no state information at all

2.

What are the characteristics of stateless server?

   A.) Easier to implement
   B.) They are not fault-tolerant upon client or server failures
   C.) They store all information file server
   D.) They are redundant to keep data safe

Answer: Option 'A'

Easier to implement

3.

Implementation of a stateless file server must not follow?

   A.) Idempotency requirement
   B.) Encryption of keys
   C.) File locking mechanism
   D.) Cache consistency

Answer: Option 'B'

​Encryption of keys

4.

What are the advantages of file replication?

   A.) Improves availability & performance
   B.) Decreases performance
   C.) They are consistent
   D.) Improves speed

Answer: Option 'A'

Improves availability & performance

5.

What are characteristic of NFS protocol?

   A.) Search for file within directory
   B.) Read a set of directory entries
   C.) Manipulate links and directories
   D.) All of the mentioned

Answer: Option 'D'

All of the mentioned

6.

What is 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

Answer: Option 'D'

All of the mentioned

7.

What are non characteristics of session semantics?

   A.) Each client obtains a working copy from the server
   B.) When file is closed, the modified file is copied to the file server
   C.) The burden of coordinating file sharing is ignored by the system
   D.) Easy to implement in a single processor system

Answer: Option 'D'

Easy to implement in a single processor system

8.

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

Answer: Option 'B'

​Unix, Transaction & Session semantics

9.

What are the characteristics of Unix semantics?

   A.) Easy to implement in a single processor system
   B.) Data cached on a per process basis using write through case control
   C.) Write-back enhances access performance
   D.) All of the mentioned

Answer: Option 'D'

All of the mentioned

10.

What are the characteristics of transaction semantics ?

   A.) Suitable for applications that are concerned about coherence of data
   B.) The users of this model are interested in the atomicity property for their transaction
   C.) Easy to implement in a single processor system
   D.) Write-back enhances access performance

Answer: Option 'B'

The users of this model are interested in the atomicity property for their transaction


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