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

Accepted Answer

XDR stands for External Data Representation, which is a standard for the description and encoding of data. It is used in distributed file systems to ensure that data formatted by one computer can be understood and used by another, regardless of differences in architecture.

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

Accepted Answer

Scalability refers to the ability of a system to grow and manage increased demand without negatively impacting performance. In the context of a file system, scalability means it can handle an increasing amount of data or number of files without degradation in system performance.

Question 3

Storing file in------------------makes it permanently available
A)secondary memory
B)ram
C)register
D)dram

Accepted Answer

Secondary memory, such as hard drives, SSDs, or magnetic tapes, provides permanent or non-volatile storage, ensuring that data remains stored even when the power is turned off. RAM, registers, and DRAM are forms of volatile memory, meaning they only retain data while powered on.

Question 4

Session file sharing semantics are suitable for caching
A)complete folder
B)complete file
C)one byte
D)one block

Accepted Answer

Session file sharing semantics are suitable for caching a complete file because they ensure consistency and coherence when the entire file is accessed and modified during a session.

Question 5

Network file system(NFS) is developed by?
A)sun microsystem
B)oracle
C)apple
D)honeywell

Accepted Answer

NFS, or Network File System, was developed by Sun Microsystems in 1984 to allow computers to access files over a network as if they were on the user's local drive.

Question 6

The file once created can not be changed is called
A)rigid file
B)rex file
C)immutable file
D)robust file

Accepted Answer

Immutable files are those that cannot be modified after they have been created. This term accurately describes files that are designed to be unchangeable.

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

Accepted Answer

Remote Procedure Calls (RPCs) are primarily used for communication between two processes on separate systems, allowing a program on one computer to execute a procedure on a server computer without the programmer needing to explicitly code the details for this remote interaction.

Question 8

To differentiate the many network services a system supports ______ are used.
A)variables
B)sockets
C)ports
D)service names

Accepted Answer

Ports are used to differentiate the many network services a system supports, allowing the system to identify and direct incoming traffic to the correct service.

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

Accepted Answer

A stub is used on the client side in RPC (Remote Procedure Call) to represent the remote procedure, acting as a proxy that handles communication with the remote server.

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

Accepted Answer

A stub in the context of networked software or distributed computing primarily acts as a client-side proxy or gateway that facilitates communication with a remote server. It packs the parameters into a form that can be transmitted over the network (B), transmits the message to the server where the server-side stub receives the message and invokes the procedure on the server side (A), and is involved in locating the port on the server (C), making all of the mentioned roles (D) correct.

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

Accepted Answer

RPCs define a machine-independent representation of data to ensure that data can be understood across different systems regardless of their underlying hardware or software configurations.

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

Accepted Answer

RMI stands for Remote Method Invocation, which is a Java API that allows objects to communicate with each other across a network.

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

Accepted Answer

Remote Method Invocation (RMI) in Java allows a thread to invoke a method on an object located in a different Java Virtual Machine (JVM), effectively enabling remote communication between programs.

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

Accepted Answer

Remote Procedure Call (RPC) is a protocol that one program can use to request a service from a program located on another computer in a network without needing to understand the network's details. It is based on the inter-process communication (IPC) mechanism and allows a process to execute on different systems while communicating with other processes through message-based communication.

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

Accepted Answer

In a distributed system, processors operate concurrently and can be located in different geographical locations, thus they are not necessarily synchronized. This lack of synchronization is one of the key characteristics that differentiates distributed systems from other types of computer systems.

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

Accepted Answer

A distributed file system is characterized by its users, servers, and storage devices being dispersed across a network, allowing for data sharing and access from multiple locations.

Question 17

What is not a major reason for building distributed systems?
A)resource sharing
B)computation speedup
C)reliability
D)simplicity

Accepted Answer

Distributed systems are inherently complex due to their nature of coordinating and managing multiple interconnected components across different machines or locations. The goal of building distributed systems is often to achieve resource sharing, computation speedup, and reliability, not 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

Accepted Answer

A stateless file server does not maintain any state information internally, meaning it does not keep track of any client interactions or file access history.

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

Accepted Answer

Stateless servers are easier to implement because they do not need to maintain any session information between requests. Each request is independent and contains all the information needed to process it.

Question 20

What are the advantages of file replication?
A)improves availability & performance
B)decreases performance
C)they are consistent
D)improves speed

Accepted Answer

File replication improves availability and performance by ensuring that multiple copies of files are available across different locations, reducing access time and providing redundancy.

Quiz 4: Distributed File System and Remote Procedure Calls

In distributed file system,XDR stands for?

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

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

Session file sharing semantics are suitable for caching

Network file system(NFS) is developed by?

The file once created can not be changed is called

Remote Procedure Calls are used ____________

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

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

What is stub?

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

What is the full form of RMI?

The remote method invocation __________

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 ________

What is not true about a distributed system?

What are the characteristics of a distributed file system?

What is not a major reason for building distributed systems?

What is a stateless file server?

What are the characteristics of the stateless server?

What are the advantages of file replication?