Question 1

The __________ grid computing layer coordinates distributed resources.

Accepted Answer

A)  collective layer 
B)  coordination layer 
C)  connectivity layer 
D)  resources layer 
A)  collective layer 
B)  coordination layer 
C)  connectivity layer 
D)  resources layer A

Question 2

In JXTA, __________ act as virtual communication channels.

Accepted Answer

A)  pipes 
B)  advertisements 
C)  endpoint routers 
D)  peers 
A)  pipes 
B)  advertisements 
C)  endpoint routers 
D)  peers A

Question 3

Which of the following statements is false?

Accepted Answer

A)  Clustering achieves reliability and fault tolerance by providing redundant copies of services and resources in case of failure. 
B)  Multiprocessor systems are more scalable than clusters. 
C)  Beowulf is an example of a high-performance cluster. 
D)  Windows Server 2003 can be used to build both high-availability clusters and load-balancing clusters. 
A)  Clustering achieves reliability and fault tolerance by providing redundant copies of services and resources in case of failure. 
B)  Multiprocessor systems are more scalable than clusters. 
C)  Beowulf is an example of a high-performance cluster. 
D)  Windows Server 2003 can be used to build both high-availability clusters and load-balancing clusters. B

Question 4

Peer-to-peer applications __________.

Accepted Answer

A)  distribute responsibilities and functions among peers in the network 
B)  never rely on a central server 
C)  require each peer performs client and server functions 
D)  both a and c 
A)  distribute responsibilities and functions among peers in the network 
B)  never rely on a central server 
C)  require each peer performs client and server functions 
D)  both a and c

Question 5

When a Jini service registers with a lookup service, the registration is __________.

Accepted Answer

A)  permanent; only the client can remove it 
B)  permanent; only the lookup service can remove it 
C)  leased for a specific amount of time, after which it cannot be renewed 
D)  leased for a specific amount of time, after which it can be renewed 
A)  permanent; only the client can remove it 
B)  permanent; only the lookup service can remove it 
C)  leased for a specific amount of time, after which it cannot be renewed 
D)  leased for a specific amount of time, after which it can be renewed

Question 6

A __________ cluster is typically used in e-business applications with high user volumes.

Accepted Answer

A)  high-performance cluster 
B)  high-availability cluster 
C)  load-balancing cluster 
D)  high-scalability cluster 
A)  high-performance cluster 
B)  high-availability cluster 
C)  load-balancing cluster 
D)  high-scalability cluster

Question 7

Which of the following NFS-4 features improves performance?

Accepted Answer

A)  Implementing stateful server. 
B)  Implementing stateless server. 
C)  Implementing client-caching scheme through delegation. 
D)  Using PRCs to communicate between client and server. 
A)  Implementing stateful server. 
B)  Implementing stateless server. 
C)  Implementing client-caching scheme through delegation. 
D)  Using PRCs to communicate between client and server.

Question 8

In AFS-1 and AFS-2, the distributed file system cache was updated at the __________ level. In AFS-3, the distributed file system cache was updated at the __________ level.

Accepted Answer

A)  file, block 
B)  block, file 
C)  user, server 
D)  server, user 
A)  file, block 
B)  block, file 
C)  user, server 
D)  server, user

Question 9

Which of the following statements is false?

Accepted Answer

A)  Fault tolerance is easier to implement in stateless systems. 
B)  Stateful systems can reduce the size of request messages. 
C)  Stateless systems offer better performance. 
D)  A distributed file server can be either stateful or stateless. 
A)  Fault tolerance is easier to implement in stateless systems. 
B)  Stateful systems can reduce the size of request messages. 
C)  Stateless systems offer better performance. 
D)  A distributed file server can be either stateful or stateless.

Question 10

Which of the following statement about JavaSpaces is false?

Accepted Answer

A)  A JavaSpaces service is a Jini service. 
B)  Objects in a JavaSpaces service belong to a particular client. 
C)  Multiple processes can access a JavaSpaces service concurrently. 
D)  An object stored in a JavaSpaces service will remain in the service until its lease expires or until a program removes the object from the JavaSpaces. 
A)  A JavaSpaces service is a Jini service. 
B)  Objects in a JavaSpaces service belong to a particular client. 
C)  Multiple processes can access a JavaSpaces service concurrently. 
D)  An object stored in a JavaSpaces service will remain in the service until its lease expires or until a program removes the object from the JavaSpaces.

Question 11

A JavaSpaces service provides the __________ operations.

Accepted Answer

A)  read and write 
B)  read, write and remove 
C)  read, write and take 
D)  read, write and put 
A)  read and write 
B)  read, write and remove 
C)  read, write and take 
D)  read, write and put

Question 12

Sprite offers better __________ than that of NFS, AFS and Coda.

Accepted Answer

A)  performance 
B)  transparency 
C)  fault tolerance 
D)  security 
A)  performance 
B)  transparency 
C)  fault tolerance 
D)  security

Question 13

The .NET initiative enables programmers to develop Web services in __________.

Accepted Answer

A)  C, C++ and Java 
B)  Java, ASP and C++ 
C)  C++, C# and Visual Basic .NET 
D)  C++ and Visual Basic. NET 
A)  C, C++ and Java 
B)  Java, ASP and C++ 
C)  C++, C# and Visual Basic .NET 
D)  C++ and Visual Basic. NET

Question 14

.NET Web services allow developers to reuse software components that __________.

Accepted Answer

A)  are written in different languages, such as Java and C# 
B)  reside on different machines only if they use the same platform 
C)  reside on different machines using different platforms 
D)  Both a and c 
A)  are written in different languages, such as Java and C# 
B)  reside on different machines only if they use the same platform 
C)  reside on different machines using different platforms 
D)  Both a and c

Question 15

JXTA does not address the issue of __________.

Accepted Answer

A)  security 
B)  network incompatibility 
C)  network delay 
D)  platform incompatibility 
A)  security 
B)  network incompatibility 
C)  network delay 
D)  platform incompatibility

Question 16

NFS-3 supports __________, which allow a server to continue executing before a write has been completed.

Accepted Answer

A)  safe synchronous writes 
B)  safe asynchronous writes 
C)  safe concurrent writes 
D)  safe continuous writes 
A)  safe synchronous writes 
B)  safe asynchronous writes 
C)  safe concurrent writes 
D)  safe continuous writes

Question 17

The trade-off faced by distributed computing implementation is that __________.

Accepted Answer

A)  scalability is reduced 
B)  fault tolerance is reduced 
C)  complexity increases 
D)  all of the above 
A)  scalability is reduced 
B)  fault tolerance is reduced 
C)  complexity increases 
D)  all of the above

Question 18

Searches in both Gnutella and Freenet are examples of __________.

Accepted Answer

A)  centralized searches 
B)  distributed searches 
C)  peer searches 
D)  query searches 
A)  centralized searches 
B)  distributed searches 
C)  peer searches 
D)  query searches

Question 19

__________ is an example of grid computing.

Accepted Answer

A)  Earth Simulator 
B)  Q 
C)  Green Destiny 
D)  SETI@HOME 
A)  Earth Simulator 
B)  Q 
C)  Green Destiny 
D)  SETI@HOME

Question 20

Coda clients enter the __________ when they are connected to Coda.

Accepted Answer

A)  initiation stage 
B)  hoarding stage 
C)  emulation stage 
D)  reintegration stage 
A)  initiation stage 
B)  hoarding stage 
C)  emulation stage 
D)  reintegration stage

Exam 18: Exploring Distributed File Systems and Grid Computing With NFS, AFS, Coda, and JXTA

The __________ grid computing layer coordinates distributed resources.

In JXTA, __________ act as virtual communication channels.

Which of the following statements is false?

Peer-to-peer applications __________.

When a Jini service registers with a lookup service, the registration is __________.

A __________ cluster is typically used in e-business applications with high user volumes.

Which of the following NFS-4 features improves performance?

In AFS-1 and AFS-2, the distributed file system cache was updated at the __________ level. In AFS-3, the distributed file system cache was updated at the __________ level.

Which of the following statements is false?

Which of the following statement about JavaSpaces is false?

A JavaSpaces service provides the __________ operations.

Sprite offers better __________ than that of NFS, AFS and Coda.

The .NET initiative enables programmers to develop Web services in __________.

.NET Web services allow developers to reuse software components that __________.

JXTA does not address the issue of __________.

NFS-3 supports __________, which allow a server to continue executing before a write has been completed.

The trade-off faced by distributed computing implementation is that __________.

Searches in both Gnutella and Freenet are examples of __________.

__________ is an example of grid computing.

Coda clients enter the __________ when they are connected to Coda.

Exploring Operating Systems and Distributed Computing: a Comprehensive Overview

Understanding Computer Systems and Programming Concepts

Understanding Processes and Threads in Operating Systems

Exploring Semaphores and Multithreading in Operating Systems

Exploring Thread Synchronization and Mutual Exclusion in Java

Concurrency and Deadlock in Database Systems: Exploring Monitor Implementation and Thread Synchronization in Java

Operating System Scheduling and Deadlock Prevention: a Comprehensive Guide

Understanding Processor Scheduling and Memory Management in Operating Systems

Memory Management in Operating Systems: Segmentation, Paging, and Strategies for Efficiency

Memory Management and Address Translation in Operating Systems

Memory Management and Page Replacement Strategies in Operating Systems

Disk Storage and Raid Technology

Understanding File Systems and Database Systems: a Comprehensive Overview

Exploring Performance Evaluation and Benchmarking in Computer Systems

Understanding Multiprocessor Organizations and System Performance

Understanding the Layers of the TCP/IP Protocol Stack

Understanding Distributed Systems and Operating Systems

Security Threats and Solutions in Cryptography and Access Control

Exploring the Linux Operating Systems Features and Functionality

In-Depth Analysis of Windows XP

Filters

In AFS-1 and AFS-2, the distributed file system cache was updated at the level. In AFS-3, the distributed file system cache was updated at the level.