Question 1

In Java, the ________ method of the Thread class contains the code that performs the "real work" of a thread.

Accepted Answer

A)  run 
B)  start 
C)  go 
D)  main 
A)  run 
B)  start 
C)  go 
D)  main A

Question 2

The size of a thread pool in Windows XP is ________.

Accepted Answer

A)  constant and specified by the programmer for each process 
B)  constant for all processes on a system 
C)  variable, modified by the system in response to the volume of requests 
D)  all of the above are possible 
A)  constant and specified by the programmer for each process 
B)  constant for all processes on a system 
C)  variable, modified by the system in response to the volume of requests 
D)  all of the above are possible C

Question 3

A POSIX thread that defers cancellation ________.

Accepted Answer

A)  can be terminated at any point during its execution 
B)  will not be cancelled until it explicitly checks for a cancellation request 
C)  is not notified when a cancellation operation has been requested 
D)  none of the above 
A)  can be terminated at any point during its execution 
B)  will not be cancelled until it explicitly checks for a cancellation request 
C)  is not notified when a cancellation operation has been requested 
D)  none of the above B

Question 4

In Windows XP, a thread enters the ________ state when the thread's requested data is currently unavailable, but the thread is otherwise ready to execute.

Accepted Answer

A)  standby 
B)  transition 
C)  waiting 
D)  unknown 
A)  standby 
B)  transition 
C)  waiting 
D)  unknown

Question 5

Which of the following applications can benefit from multithreading?

Accepted Answer

A)  a simple text editor 
B)  a Web server 
C)  an image viewer 
D)  both a and c 
A)  a simple text editor 
B)  a Web server 
C)  an image viewer 
D)  both a and c

Question 6

According to the POSIX threading API, processor registers, a stack and a signal mask are ________.

Accepted Answer

A)  maintained individually for each thread in a process 
B)  shared between all threads in a process 
C)  shared between some threads in a process 
D)  none of the above 
A)  maintained individually for each thread in a process 
B)  shared between all threads in a process 
C)  shared between some threads in a process 
D)  none of the above

Question 7

Which of the following statements about kernel-level threads is false?

Accepted Answer

A)  The kernel can manage each of a process's threads individually. 
B)  A process that uses kernel-level threads often can adjust the level of service each thread receives from the operating system. 
C)  Software that employs kernel-level threads often is more portable than software that employs user-level threads. 
D)  Kernel-level threads require the operating system to manage all threads in the system. 
A)  The kernel can manage each of a process's threads individually. 
B)  A process that uses kernel-level threads often can adjust the level of service each thread receives from the operating system. 
C)  Software that employs kernel-level threads often is more portable than software that employs user-level threads. 
D)  Kernel-level threads require the operating system to manage all threads in the system.

Question 8

The POSIX specification provides the ________ standard for developing portable multithreaded applications.

Accepted Answer

A)  Win32 threads 
B)  Pthreads 
C)  C-threads 
D)  portable threads 
A)  Win32 threads 
B)  Pthreads 
C)  C-threads 
D)  portable threads

Question 9

Which of the following statements about scheduler activations is false?

Accepted Answer

A)  A scheduler activation executes the process's user-level threading-library initialization code. 
B)  A scheduler activation is a user thread that can notify a kernel-level threading library of events. 
C)  A scheduler activation creates threads and requests additional processors for its threads, if necessary. 
D)  An additional scheduler activation is created for each processor allocated to a process. 
A)  A scheduler activation executes the process's user-level threading-library initialization code. 
B)  A scheduler activation is a user thread that can notify a kernel-level threading library of events. 
C)  A scheduler activation creates threads and requests additional processors for its threads, if necessary. 
D)  An additional scheduler activation is created for each processor allocated to a process.

Question 10

Kernel-level threads are often described as ________ thread mappings.

Accepted Answer

A)  one-to-one 
B)  one-to-many 
C)  many-to-one 
D)  many-to-many 
A)  one-to-one 
B)  one-to-many 
C)  many-to-one 
D)  many-to-many

Question 11

Many operating systems require ________ instructions to share resources than they do to initialize them, so in these systems, thread creation is ________ than process creation.

Accepted Answer

A)  more, faster 
B)  more, slower 
C)  fewer, faster 
D)  fewer, slower 
A)  more, faster 
B)  more, slower 
C)  fewer, faster 
D)  fewer, slower

Question 12

In which of the following events would the operating system send a synchronous signal?

Accepted Answer

A)  when an I/O operation completes 
B)  when the operating system suspends a process 
C)  when a process or thread performs an illegal memory operation 
D)  when the operating system continues a process 
A)  when an I/O operation completes 
B)  when the operating system suspends a process 
C)  when a process or thread performs an illegal memory operation 
D)  when the operating system continues a process

Question 13

Which of the following statements about Windows XP threads is false?

Accepted Answer

A)  Threads are the primary unit of execution in Windows XP. 
B)  Threads execute a portion of a process's code in the process's context. 
C)  Each thread contains its own execution context. 
D)  Each thread belonging to a process is assigned a unique virtual address space. 
A)  Threads are the primary unit of execution in Windows XP. 
B)  Threads execute a portion of a process's code in the process's context. 
C)  Each thread contains its own execution context. 
D)  Each thread belonging to a process is assigned a unique virtual address space.

Question 14

Threads in user space can be more appropriate than kernel threads because ________.

Accepted Answer

A)  user-level threads do not require the operating system to support threads. 
B)  application developers can tune the threading library's scheduling algorithm to meet the needs of specific applications. 
C)  user-level threads do not invoke the kernel for synchronization, which can reduce overhead. 
D)  all of the above 
A)  user-level threads do not require the operating system to support threads. 
B)  application developers can tune the threading library's scheduling algorithm to meet the needs of specific applications. 
C)  user-level threads do not invoke the kernel for synchronization, which can reduce overhead. 
D)  all of the above

Question 15

Which of the following statements about threads is false?

Accepted Answer

A)  Threads possess a subset of the resources contained in a process. 
B)  Threads can be dispatched to a processor. 
C)  Threads cannot execute instructions independent of other processes. 
D)  A process's threads can cooperate to attain a common goal efficiently. 
A)  Threads possess a subset of the resources contained in a process. 
B)  Threads can be dispatched to a processor. 
C)  Threads cannot execute instructions independent of other processes. 
D)  A process's threads can cooperate to attain a common goal efficiently.

Question 16

Multithreading is important because it can ________.

Accepted Answer

A)  facilitate software design and promote good programming practices 
B)  improve performance and scalability 
C)  facilitate cooperation/synchronization of activities 
D)  all of the above 
A)  facilitate software design and promote good programming practices 
B)  improve performance and scalability 
C)  facilitate cooperation/synchronization of activities 
D)  all of the above

Question 17

In Linux, what is the difference between the fork and clone system calls?

Accepted Answer

A)  clone accepts arguments that specify which resources to share with the spawned process. 
B)  Linux responds to the clone system call by creating a new task that contains a copy of all of its parent's resources. 
C)  clone creates a copy of the calling task, and the copy becomes the parent of the task that issued the clone system call. 
D)  fork and clone spawn child processes in exactly the same way. 
A)  clone accepts arguments that specify which resources to share with the spawned process. 
B)  Linux responds to the clone system call by creating a new task that contains a copy of all of its parent's resources. 
C)  clone creates a copy of the calling task, and the copy becomes the parent of the task that issued the clone system call. 
D)  fork and clone spawn child processes in exactly the same way.

Question 18

A(n) ________ thread can enter the sleeping state for a specified period of time, after which it enters to the ________ state.

Accepted Answer

A)  ready, running 
B)  running, ready 
C)  running, blocked 
D)  waiting, ready 
A)  ready, running 
B)  running, ready 
C)  running, blocked 
D)  waiting, ready

Question 19

User-level thread implementations are also called ________ thread mappings.

Accepted Answer

A)  one-to-one 
B)  one-to-many 
C)  many-to-one 
D)  many-to-many 
A)  one-to-one 
B)  one-to-many 
C)  many-to-one 
D)  many-to-many

Question 20

According to the POSIX specification, processes send signals by specifying a ________.

Accepted Answer

A)  thread identifier 
B)  process identifier 
C)  pointer to a process control block 
D)  any of the above are allowed 
A)  thread identifier 
B)  process identifier 
C)  pointer to a process control block 
D)  any of the above are allowed

Exam 4: Exploring Semaphores and Multithreading in Operating Systems

In Java, the ________ method of the Thread class contains the code that performs the "real work" of a thread.

The size of a thread pool in Windows XP is ________.

A POSIX thread that defers cancellation ________.

In Windows XP, a thread enters the ________ state when the thread's requested data is currently unavailable, but the thread is otherwise ready to execute.

Which of the following applications can benefit from multithreading?

According to the POSIX threading API, processor registers, a stack and a signal mask are ________.

Which of the following statements about kernel-level threads is false?

The POSIX specification provides the ________ standard for developing portable multithreaded applications.

Which of the following statements about scheduler activations is false?

Kernel-level threads are often described as ________ thread mappings.

Many operating systems require ________ instructions to share resources than they do to initialize them, so in these systems, thread creation is ________ than process creation.

In which of the following events would the operating system send a synchronous signal?

Which of the following statements about Windows XP threads is false?

Threads in user space can be more appropriate than kernel threads because ________.

Which of the following statements about threads is false?

Multithreading is important because it can ________.

In Linux, what is the difference between the fork and clone system calls?

A(n) ________ thread can enter the sleeping state for a specified period of time, after which it enters to the ________ state.

User-level thread implementations are also called ________ thread mappings.

According to the POSIX specification, processes send signals by specifying a ________.

Exploring Operating Systems and Distributed Computing: a Comprehensive Overview

Understanding Computer Systems and Programming Concepts

Understanding Processes and Threads 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

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

Security Threats and Solutions in Cryptography and Access Control

Exploring the Linux Operating Systems Features and Functionality

In-Depth Analysis of Windows XP

Filters

Many operating systems require instructions to share resources than they do to initialize them, so in these systems, thread creation is than process creation.

A(n) thread can enter the sleeping state for a specified period of time, after which it enters to the state.