Deck 15: Multithreading, Networks, Clientserver Programming

Question 1

The problems of running and scheduling processes are more complex on a networked system.

Answer 1

True

Question 2

In Java, a thread is an object in that it can hold data, receive messages, be stored in data structures, and be passed as parameters to methods. ____________________

Answer 2

True

Question 3

____ computing is the discipline of building hardware architectures, operating systems, and specialized algorithms for running a program on a cluster of processors.

A) Multiprocessor
B) Multithreading
C) Synchronized
D) Parallel

Answer 3

D

Question 4

All of these facts describe multiprocessing systems EXCEPT ____.

A) An example is the Macintosh Multifinder
B) Involves running a single program on several CPUs at once
C) A related development was the ability of a program to start another program
D) The concept of a single user running several programs at once was extended to desktop microcomputers in the late 1980s

Question 5

Threads that interact by sharing data are said to have a producer/consumer relationship.

Question 6

The methods wait and notify, respectively, suspend and resume the execution of the calling thread.

Question 7

FIGURE 15-1
Figure 15-1 above shows stages in the life of a(n) ____.

A) parameter
B) thread
C) process
D) socket

Question 8

All of these facts describe time-sharing systems EXCEPT ____.

A) Were developed in the late 1980s
B) Allowed several programs to run concurrently on a single computer
C) Users logged in to the computer via a remote terminal.
D) Still used today in the form of Web and e-mail servers

Question 9

The code in a shared method runs as an indivisible unit. ____________________

Question 10

In a two-way chat program, there are two distinct Java application programs, one for the client and one for the server.

Question 11

Sleeping threads wake up in the order in which they were started.

Question 12

In addition to holding data, the active cell must be in one of two states: writable or not writable. ____________________

Question 13

When a thread's run method had executed its last instruction, the thread dies as an object.

Question 14

In a two-way chat, the client connects to the server, and the two programs engage in communication until one of them, usually the server, chooses to quit.

Question 15

Client and server threads can run concurrently on a single computer or be distributed across several computers that are linked in a network.

Question 16

Every computer on a network has a unique identifier called an IP address.

Question 17

Context switch is the process of saving or restoring a thread's state. ____________________

Question 18

The CPU is an example of a data structure.

Question 19

After it is created, a thread remains inactive until someone runs its run method. ____________________

Question 20

____ is the ability of a program to start another program by creating a new process.

A) Multithreading
B) Multiprocessing
C) Forking
D) Context switching

Question 21

FIGURE 15-2
In a program such as the day/time program, the ____ is responsible for establishing an input stream on the connection

A) client
B) server
C) port
D) socket

Question 22

A(n) ____________________ is an object on which a process can obtain a lock.

Question 23

In a producer/consumer relationship, all of the following are true EXCEPT ____.

A) A producer must produce each item before a consumer consumes it
B) The producer can produce a new item before the consumer consumes the previous item
C) A consumer must consume each item just once
D) All of the above are true

Question 24

FIGURE 15-2
In a program such as the day/time program, the ____ is responsible for informing the user that it has started.

A) client
B) server
C) port
D) socket

Question 25

A(n) ____ is a thread that listens indefinitely for client requests, but does not handle them directly.

A) socket
B) port
C) server daemon
D) monitor

Question 26

The term ____________________ refers to processes that can run concurrently to solve a problem.

Question 27

A(n) ____ is an object that establishes a communication link between two ports.

A) IP number
B) monitor
C) channel
D) socket

Question 28

IP stands for ____.

A) Internet Protocol
B) Internal Protocol
C) Internet Process
D) Internal Process

Question 29

FIGURE 15-2
In a program such as the day/time program, the ____ is responsible for establishing an output stream on the connection.

A) client
B) server
C) port
D) socket

Question 30

FIGURE 15-1
A(n) ____ is a data structure that enforces first-come, first-served access to a single resource.

A) queue
B) CPU
C) set
D) collection

Question 31

FIGURE 15-2
Jody knows that a(n) ____ loop creates problems such as the ability to handle only one client at a time.

A) nested
B) while (true)
C) enhanced for
D) if (then)

Question 32

While the cell is writable, the caller of ____ must wait or suspend activity until the producer writes a datum.

A) SharedCell
B) setData
C) getData
D) currentThread

Question 33

The queue containing threads that can be executed is called the ____________________ queue.

Question 34

FIGURE 15-2
In Figure 15-2 above, the ____ is usually specified by a number, such as 13 for the day/time server.

A) client program
B) server program
C) socket
D) port

Question 35

When a thread is waiting for some event, such as user input, to occur, it is in ____ mode.

A) sleep
B) wait
C) switch
D) block

Question 36

A(n) ____ repeatedly reads an integer from the cell, until it reaches an upper bound.

A) producer
B) socket
C) client handler
D) consumer

Question 37

Time ____ is the process of automatically timing out.

A) crunching
B) ending
C) slicing
D) threading

Question 38

In Esteban's program, the ____ method constructs a new thread.

A) Thread( )
B) boolean isAlive( )
C) void run( )
D) static void yield( )

Question 39

A(n) ____ repeatedly writes an integer to the cell and increments the integer, until it reaches an upper bound.

A) producer
B) socket
C) client handler
D) consumer

Question 40

While the cell is not writable, the caller of ____ must wait or suspend activity until the consumer reads a datum.

A) SharedCell
B) setData
C) getData
D) currentThread

Question 41

Identify the letter of the choice that best matches the phrase or definition.
a.Multithreading
b.Sleep
c.Blocked thread
d.Multiprocessing
e.Synchronization
An example is when a word processor creates a process to print a document in the background.

Question 42

A(n) ____________________ serves as a channel through which several clients can exchange data with the same server or different servers.

Question 43

A(n) ____________________ prevents another process from accessing data in the monitor until a condition becomes true.

Question 44

Identify the letter of the choice that best matches the phrase or definition.
a.Multithreading
b.Sleep
c.Blocked thread
d.Multiprocessing
e.Synchronization
A thread can be put to ____ for a given number of milliseconds.

Question 45

Identify the letter of the choice that best matches the phrase or definition.
a.Multithreading
b.Sleep
c.Blocked thread
d.Multiprocessing
e.Synchronization
These types of problems include when the consumer attempts to access either data that isn't there or the same data twice.

Question 46

Identify the letter of the choice that best matches the phrase or definition.
a.Multithreading
b.Sleep
c.Blocked thread
d.Multiprocessing
e.Synchronization
When a ____ is notified that an event has occurred, it goes to the rear of the ready queue.

Question 47

Identify the letter of the choice that best matches the phrase or definition.
a.Multithreading
b.Sleep
c.Blocked thread
d.Multiprocessing
e.Synchronization
Using multiple processes in a program.