Question 1

Which of the following HTTP commands supplies input to a server-side command and returns the result?

Accepted Answer

A)  CONNECT 
B)  DELETE 
C)  HEAD 
D)  POST 
A)  CONNECT 
B)  DELETE 
C)  HEAD 
D)  POST D

Question 2

A page not found has status code _______________.

Accepted Answer

A)  200 not found. 
B)  404 not found. 
C)  0 not found. 
D)  100 not found. 
A)  200 not found. 
B)  404 not found. 
C)  0 not found. 
D)  100 not found. B

Question 3

The ______ method empties the buffer and forwards all waiting characters to the destination.

Accepted Answer

A)  print 
B)  send 
C)  scan 
D)  flush 
A)  print 
B)  send 
C)  scan 
D)  flush D

Question 4

For the server to execute the run method in a separate thread for each client, the application program needs to implement the _____ interface.

Accepted Answer

A)  Running 
B)  Runtime 
C)  Server 
D)  Runnable 
A)  Running 
B)  Runtime 
C)  Server 
D)  Runnable

Question 5

Write a code fragment that connects to a server running on gorge.divms.uiowa.edu at port 2345 and sends the message "Hello server" to the server and then reads the one-line response from the server.

Accepted Answer

A)  Socket sock = new Socket(2345, gorge.divms.uiowa.edu);
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello server");
Pw)flush();
String line = scan.nextLine();
Scanner scan = new Scanner(sock.getInputStream()); 
B)  Socket sock = new Socket(gorge.divms.uiowa.edu);
PrintWriter pw = new PrintWriter(sock.getOutputStream(), 2345);
Pw)println("Hello server");
Pw)flush();
Scanner scan = new Scanner(sock.getInputStream());
String line = scan.nextLine(); 
C)  Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello server");
Pw)flush();
Scanner scan = new Scanner(sock.getInputStream());
String line = scan.nextLine(); 
D)  Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
PrintWriter pw = new PrintWriter(sock.getInputStream());
Pw)println("Hello server");
Pw)flush();
Scanner scan = new Scanner(sock.getOutputStream());
String line = scan.nextLine(); 
A)  Socket sock = new Socket(2345, gorge.divms.uiowa.edu);
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello server");
Pw)flush();
String line = scan.nextLine();
Scanner scan = new Scanner(sock.getInputStream()); 
B)  Socket sock = new Socket(gorge.divms.uiowa.edu);
PrintWriter pw = new PrintWriter(sock.getOutputStream(), 2345);
Pw)println("Hello server");
Pw)flush();
Scanner scan = new Scanner(sock.getInputStream());
String line = scan.nextLine(); 
C)  Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello server");
Pw)flush();
Scanner scan = new Scanner(sock.getInputStream());
String line = scan.nextLine(); 
D)  Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
PrintWriter pw = new PrintWriter(sock.getInputStream());
Pw)println("Hello server");
Pw)flush();
Scanner scan = new Scanner(sock.getOutputStream());
String line = scan.nextLine();

Question 6

The term _____________ data refers to the data that describe how to reach the intended recipient and how to check for errors and data loss in the transmission.

Accepted Answer

A)  packet 
B)  socket 
C)  application data 
D)  network protocol 
A)  packet 
B)  socket 
C)  application data 
D)  network protocol

Question 7

The ____________ has one function, to attempt to deliver data from one computer to another across the Internet.

Accepted Answer

A)  TCP/IP 
B)  IP 
C)  HTTP 
D)  DNS 
A)  TCP/IP 
B)  IP 
C)  HTTP 
D)  DNS

Question 8

What does TCP/IP stand for?

Accepted Answer

A)  Transmission Control and Internet Protocol. 
B)  Transmission Control Protocol and Internet Protocol. 
C)  Transmission Protocol and Internet Protocol. 
D)  Transmission Control Protocol over Internet Protocol. 
A)  Transmission Control and Internet Protocol. 
B)  Transmission Control Protocol and Internet Protocol. 
C)  Transmission Protocol and Internet Protocol. 
D)  Transmission Control Protocol over Internet Protocol.

Question 9

To open a connection, which of the following statements can you use?

Accepted Answer

A)  URL u = new URL("http://www.yahoo.com");
URLConnection conn = u.open(); 
B)  URL u = new URL("http://www.yahoo.com");
URLConnection conn = new URLConnection(u); 
C)  URL u = new URL("http://www.yahoo.com");
URLConnection conn = u.openURLConnection(); 
D)  URL u = new URL("http://www.yahoo.com");
URLConnection conn = u.openConnection(); 
A)  URL u = new URL("http://www.yahoo.com");
URLConnection conn = u.open(); 
B)  URL u = new URL("http://www.yahoo.com");
URLConnection conn = new URLConnection(u); 
C)  URL u = new URL("http://www.yahoo.com");
URLConnection conn = u.openURLConnection(); 
D)  URL u = new URL("http://www.yahoo.com");
URLConnection conn = u.openConnection();

Question 10

What are among the most important pieces of information that must be included in an IP packet?
I. The Internet address of the recipient
II. The URL of the recipient
III. The Internet address of the sender
IV. The port number of the sender

Accepted Answer

A)  I, III, and IV 
B)  I, II, and III 
C)  II, III, and IV 
D)  I, II, III, and IV 
A)  I, III, and IV 
B)  I, II, and III 
C)  II, III, and IV 
D)  I, II, III, and IV

Question 11

Each IP ____ is delivered separately, and each one that is a part of the same transmission can take different routes through the Internet.

Accepted Answer

A)  packet 
B)  socket 
C)  address 
D)  port number 
A)  packet 
B)  socket 
C)  address 
D)  port number

Question 12

Which of the following statements is correct?

Accepted Answer

A)  HTML is a protocol that describes the command set for web server requests. 
B)  Web servers know how to display HTML documents. 
C)  Web servers know how to issue HTTP commands. 
D)  The Telnet program is not a browser and does not understand HTML tags. 
A)  HTML is a protocol that describes the command set for web server requests. 
B)  Web servers know how to display HTML documents. 
C)  Web servers know how to issue HTTP commands. 
D)  The Telnet program is not a browser and does not understand HTML tags.

Question 13

IP breaks up large chunks of data into more manageable ____________________.

Accepted Answer

A)  packets 
B)  sockets 
C)  application data 
D)  network protocol data 
A)  packets 
B)  sockets 
C)  application data 
D)  network protocol data

Question 14

When you communicate with a mail server, you ___________, or you can learn how to use Java mail extensions.

Accepted Answer

A)  can write programs that send GET and POP commands. 
B)  can write programs that send SMTP and POST commands. 
C)  can write programs that send GET and POST commands 
D)  can write programs that send SMTP and POP commands. 
A)  can write programs that send GET and POP commands. 
B)  can write programs that send SMTP and POST commands. 
C)  can write programs that send GET and POST commands 
D)  can write programs that send SMTP and POP commands.

Question 15

Suppose you use the URLGet program in Section 21.5 to get a web page from a server that does not exist, such as http://wombat.java/index.html. What will happen?

Accepted Answer

A)  The call to the URL constructor will throw an exception. 
B)  The call to getResponseCode will throw an exception. 
C)  The call to getResponseCode will return the error code 404. 
D)  The call to getInputStream will throw an exception. 
A)  The call to the URL constructor will throw an exception. 
B)  The call to getResponseCode will throw an exception. 
C)  The call to getResponseCode will return the error code 404. 
D)  The call to getInputStream will throw an exception.

Question 16

The ____ is used to download received messages from e-mail servers.

Accepted Answer

A)  SMTP 
B)  TCP 
C)  IP 
D)  POP 
A)  SMTP 
B)  TCP 
C)  IP 
D)  POP

Question 17

What does the acronym POP stand for?

Accepted Answer

A)  Point to Point 
B)  Post Office Point 
C)  Protocol Of Point 
D)  Post Office Protocol 
A)  Point to Point 
B)  Post Office Point 
C)  Protocol Of Point 
D)  Post Office Protocol

Question 18

The ____ program is a useful tool for establishing test connections with servers.

Accepted Answer

A)  DNS 
B)  HTML 
C)  Telnet 
D)  TCP 
A)  DNS 
B)  HTML 
C)  Telnet 
D)  TCP

Question 19

_________ objects are used for communication (IO) between two computers (client and server).

Accepted Answer

A)  ServerSocket 
B)  Socket 
C)  ClientSocket 
D)  Packet 
A)  ServerSocket 
B)  Socket 
C)  ClientSocket 
D)  Packet

Question 20

Which code fragment creates a server running at port 6666 and sends one line of text, "Hello from earth" over and over to any machine that connects to the server.

Accepted Answer

A)  ServerSocket ss = new ServerSocket(6666);
Socket sock = ss.accept();
While (true)
{
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello from earth");
Pw)flush();
Pw)close();
} 
B)  ServerSocket ss = new ServerSocket(6666);
While (true)
{
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello from earth");
Socket sock = ss.accept();
} 
C)  ServerSocket ss = new ServerSocket(6666);
While (true)
{
Socket sock = ss.accept();
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello from earth");
Pw)flush();
Pw)close();
} 
D)  Socket sock = ss.accept();
While (true)
{
ServerSocket ss = new ServerSocket(6666);
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello from earth");
Pw)flush();
Pw)close();
} 
A)  ServerSocket ss = new ServerSocket(6666);
Socket sock = ss.accept();
While (true)
{
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello from earth");
Pw)flush();
Pw)close();
} 
B)  ServerSocket ss = new ServerSocket(6666);
While (true)
{
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello from earth");
Socket sock = ss.accept();
} 
C)  ServerSocket ss = new ServerSocket(6666);
While (true)
{
Socket sock = ss.accept();
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello from earth");
Pw)flush();
Pw)close();
} 
D)  Socket sock = ss.accept();
While (true)
{
ServerSocket ss = new ServerSocket(6666);
PrintWriter pw = new PrintWriter(sock.getOutputStream());
Pw)println("Hello from earth");
Pw)flush();
Pw)close();
}

Exam 21: Internet Networking

Which of the following HTTP commands supplies input to a server-side command and returns the result?

A page not found has status code _______________.

The ______ method empties the buffer and forwards all waiting characters to the destination.

For the server to execute the run method in a separate thread for each client, the application program needs to implement the _____ interface.

Write a code fragment that connects to a server running on gorge.divms.uiowa.edu at port 2345 and sends the message "Hello server" to the server and then reads the one-line response from the server.

The term _____________ data refers to the data that describe how to reach the intended recipient and how to check for errors and data loss in the transmission.

The ____________ has one function, to attempt to deliver data from one computer to another across the Internet.

What does TCP/IP stand for?

To open a connection, which of the following statements can you use?

What are among the most important pieces of information that must be included in an IP packet? I. The Internet address of the recipient II. The URL of the recipient III. The Internet address of the sender IV. The port number of the sender

Each IP ____ is delivered separately, and each one that is a part of the same transmission can take different routes through the Internet.

Which of the following statements is correct?

IP breaks up large chunks of data into more manageable ____________________.

When you communicate with a mail server, you ___________, or you can learn how to use Java mail extensions.

Suppose you use the URLGet program in Section 21.5 to get a web page from a server that does not exist, such as http://wombat.java/index.html. What will happen?

The ____ is used to download received messages from e-mail servers.

What does the acronym POP stand for?

The ____ program is a useful tool for establishing test connections with servers.

_________ objects are used for communication (IO) between two computers (client and server).

Which code fragment creates a server running at port 6666 and sends one line of text, "Hello from earth" over and over to any machine that connects to the server.

Introduction

Fundamental Data Types

Decisionseasy

Loops

Methods

Arrays and Arraylists

Inputoutput and Exception Handling

Objects and Classes

Inheritance and Interfaces

Graphical User Interfaces

Advanced User Interfaces

Object-Oriented Design

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Streams and Binary Inputoutput

Multithreading

Relational Databases

XML

Web Applications

Filters