Deck 4: Distributed File System and Remote Procedure Calls

Question 1

In distributed file system,XDR stands for?

A)external data request
B)external device request
C)external data recovery
D)external data representation

Answer 1

external data representation

Question 2

If file system is growing without affecting performance of the system then this feature is called as?

A)union
B)portable
C)robust
D)scalability

Answer 2

scalability

Question 3

Storing file in------------------makes it permanently available

A)secondary memory
B)ram
C)register
D)dram

Answer 3

secondary memory

Question 4

Session file sharing semantics are suitable for caching

A)complete folder
B)complete file
C)one byte
D)one block

Question 5

Network file system(NFS) is developed by?

A)sun microsystem
B)oracle
C)apple
D)honeywell

Question 6

The file once created can not be changed is called

A)rigid file
B)rex file
C)immutable file
D)robust file

Question 7

Remote Procedure Calls are used ____________

A)for communication between two processes remotely different from each other on the same system
B)for communication between two processes on the same system
C)for communication between two processes on separate systems
D)none of the mentioned

Question 8

To differentiate the many network services a system supports ______ are used.

A)variables
B)sockets
C)ports
D)service names

Question 9

RPC provides a(an) _____ on the client side, a separate one for each remote procedure.

A)stub
B)identifier
C)name
D)process identifier

Question 10

What is stub?

A)transmits the message to the server where the server side stub receives the message and invokes procedure on the server side
B)packs the parameters into a form transmittable over the network
C)locates the port on the server
D)all of the mentioned

Question 11

To resolve the problem of data representation on different systems RPCs define _____________

A)machine dependent representation of data
B)machine representation of data
C)machine-independent representation of data
D)none of the mentioned

Question 12

What is the full form of RMI?

A)remote memory installation
B)remote memory invocation
C)remote method installation
D)remote method invocation

Question 13

The remote method invocation __________

A)allows a process to invoke memory on a remote object
B)allows a thread to invoke a method on a remote object
C)allows a thread to invoke memory on a remote object
D)allows a process to invoke a method on a remote object

Question 14

A process that is based on IPC mechanism which executes on different systems and can communicate with other processes using message based communication, is called ________

A)local procedure call
B)inter process communication
C)remote procedure call
D)remote machine invocation

Question 15

What is not true about a distributed system?

A)it is a collection of processor
B)all processors are synchronized
C)they do not share memory
D)none of the mentioned

Question 16

What are the characteristics of a distributed file system?

A)its users, servers and storage devices are dispersed
B)service activity is not carried out across the network
C)they have single centralized data repository
D)there are multiple dependent storage devices

Question 17

What is not a major reason for building distributed systems?

A)resource sharing
B)computation speedup
C)reliability
D)simplicity

Question 18

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

Question 19

What are the characteristics of the 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

Question 20

What are the advantages of file replication?

A)improves availability & performance
B)decreases performance
C)they are consistent
D)improves speed

Question 21

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

Question 22

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

Question 23

The file once created can not be changed is called ___________

A)immutable file
B)mutex file
C)mutable file
D)none of the mentioned

Question 24

______ 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

Question 25

_______ is not possible in distributed file system.

A)file replication
B)migration
C)client interface
D)remote access