Question 1

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.E) B) and C)
F) A) and B) B

Question 2

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

Accepted Answer

A)   print
B)   send
C)   scan
D)   flushE) A) and D)
F) None of the above D

Question 3

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

Accepted Answer

A)   SMTP
B)   TCP
C)   IP
D)   POPE) None of the above
F) A) and D)

Question 4

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

Accepted Answer

A)   packets
B)   sockets
C)   application data
D)   network protocol dataE) None of the above
F) All of the above

Question 5

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.E) None of the above
F) B) and D)

Question 6

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() ;E) C) and D)
F) B) and D)

Question 7

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 numberE) A) and D)
F) B) and C)

Question 8

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.E) None of the above
F) A) and B)

Question 9

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() ;}E) C) and D)
F) All of the above

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 IVE) C) and D)
F) All of the above

Question 11

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() ;E) All of the above
F) A) and D)

Question 12

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

Accepted Answer

A)   ServerSocket
B)   Socket
C)   ClientSocket
D)   PacketE) A) and C)
F) C) and D)

Question 13

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)   POSTE) A) and B)
F) A) and D) D

Question 14

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 protocolE) All of the above
F) A) and C)

Question 15

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

Accepted Answer

A)   DNS
B)   HTML
C)   Telnet
D)   TCPE) C) and D)
F) B) and D)

Question 16

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.E) A) and C)
F) None of the above

Question 17

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)   DNSE) C) and D)
F) B) and C)

Question 18

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)   RunnableE) A) and B)
F) None of the above

Question 19

What does the acronym POP stand for?

Accepted Answer

A)   Point to Point
B)   Post Office Point
C)   Protocol Of Point
D)   Post Office ProtocolE) A) and B)
F) B) and C)

Question 20

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.E) A) and B)
F) None of the above

Exam 21: Internet Networking

A page not found has status code _______________.

Correct AnswerverifiedB

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

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements is correct?

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What does TCP/IP stand for?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What does the acronym POP stand for?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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