Question 1

Write a code fragment that connects to a server running on gorge.divms.uiowa.edu at port 2345 and reads one line of text sent by the server.

Accepted Answer

A)  Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
Scanner scan = new Scanner(sock.getOutputStream());
String line = scan.nextLine(); 
B)  Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
Scanner scan = new Scanner(sock.getInputStream());
String line = scan.nextLine(); 
C)  Scanner scan = new Scanner(sock.getInputStream());
Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
String line = scan.nextLine(); 
D)  Socket sock = new Socket(2345, gorge.divms.uiowa.edu);
Scanner scan = new Scanner(sock.getInputStream());
String line = scan.next(); 
A)  Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
Scanner scan = new Scanner(sock.getOutputStream());
String line = scan.nextLine(); 
B)  Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
Scanner scan = new Scanner(sock.getInputStream());
String line = scan.nextLine(); 
C)  Scanner scan = new Scanner(sock.getInputStream());
Socket sock = new Socket(gorge.divms.uiowa.edu, 2345);
String line = scan.nextLine(); 
D)  Socket sock = new Socket(2345, gorge.divms.uiowa.edu);
Scanner scan = new Scanner(sock.getInputStream());
String line = scan.next();

Question 2

A ______ is an object that encapsulates a TCP connection.

Accepted Answer

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

Question 3

____ has built-in provisions for retrying incomplete transmissions.

Accepted Answer

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

Question 4

The HTTP command DELETE ____________.

Accepted Answer

A)  deletes two items, an item on the server and an item from the client. 
B)  deletes an item from the client. 
C)  deletes an item on the server. 
D)  deletes input from a client-side command. 
A)  deletes two items, an item on the server and an item from the client. 
B)  deletes an item from the client. 
C)  deletes an item on the server. 
D)  deletes input from a client-side command.

Question 5

The _________ class makes it easy to fetch a file from a web server.

Accepted Answer

A)  FileConnection 
B)  ServerConnection 
C)  ClientConnection 
D)  URLConnection 
A)  FileConnection 
B)  ServerConnection 
C)  ClientConnection 
D)  URLConnection

Question 6

What does the acronym SMTP stand for?

Accepted Answer

A)  Simple Mail Transfer Protocol 
B)  Small Mail Transport Protocol 
C)  Simple Mail Transport Protocol 
D)  Small Mail Transfer Protocol 
A)  Simple Mail Transfer Protocol 
B)  Small Mail Transport Protocol 
C)  Simple Mail Transport Protocol 
D)  Small Mail Transfer Protocol

Question 7

The HTTP command OPTIONS ____________.

Accepted Answer

A)  requests the item's communication options. 
B)  returns the item's options from the client. 
C)  returns the item's option on the server. 
D)  changes the options of the item. 
A)  requests the item's communication options. 
B)  returns the item's options from the client. 
C)  returns the item's option on the server. 
D)  changes the options of the item.

Question 8

The following command:
Java pgmName hostname /
Lets you retrieve any item from a web server. The slash means:

Accepted Answer

A)  the port of the hostname. 
B)  the root page of the web server. 
C)  the character to end the command. 
D)  the item name needs to be retrieved. 
A)  the port of the hostname. 
B)  the root page of the web server. 
C)  the character to end the command. 
D)  the item name needs to be retrieved.

Question 9

For test protocols, turn the socket streams into:

Accepted Answer

A)  scanners and readers. 
B)  scanners and printers. 
C)  scanners and writers. 
D)  scanners and servers. 
A)  scanners and readers. 
B)  scanners and printers. 
C)  scanners and writers. 
D)  scanners and servers.

Question 10

The HTTP response code 404 means _______________.

Accepted Answer

A)  the response is successful. 
B)  the page is found successfully. 
C)  the page was not found. 
D)  the connection is lost. 
A)  the response is successful. 
B)  the page is found successfully. 
C)  the page was not found. 
D)  the connection is lost.

Question 11

Show the command line that establishes a telnet connection with echo server (port 7) running on the computer www.eecs.utoledo.edu.

Accepted Answer

A)  telnet 7 www.eecs.utoledo.edu 
B)  connect www.eecs.utoledo.edu 7 
C)  telnet www.eecs.utoledo.edu 7 
D)  tcp www.eecs.utoledo.edu 7 
A)  telnet 7 www.eecs.utoledo.edu 
B)  connect www.eecs.utoledo.edu 7 
C)  telnet www.eecs.utoledo.edu 7 
D)  tcp www.eecs.utoledo.edu 7

Question 12

What are the steps involved in designing a client/server application?
I. Design a communication protocol.
II. Test the server with the Telnet program.
III. Implement the server program.
IV. Write a client program.

Accepted Answer

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

Question 13

Which of the following is not an HTTP command?

Accepted Answer

A)  HEAD 
B)  BODY 
C)  PUT 
D)  OPTIONS 
A)  HEAD 
B)  BODY 
C)  PUT 
D)  OPTIONS

Question 14

Sending commands over a socket connection is ___________.

Accepted Answer

A)  a high-level approach. 
B)  a medium-level approach. 
C)  a low-level approach. 
D)  a complex approach. 
A)  a high-level approach. 
B)  a medium-level approach. 
C)  a low-level approach. 
D)  a complex approach.

Question 15

What does the following if statement do?
If (code == HttpURLConnetion.HTTP_OK)

Accepted Answer

A)  It checks if the code is 200. 
B)  It checks if the code is 404. 
C)  It checks if the connection is still connected. 
D)  It checks if there is HTTP. 
A)  It checks if the code is 200. 
B)  It checks if the code is 404. 
C)  It checks if the connection is still connected. 
D)  It checks if there is HTTP.

Question 16

The ______ method of the ServerSocket class waits for a client connection.

Accepted Answer

A)  wait() 
B)  connect() 
C)  accept() 
D)  next() 
A)  wait() 
B)  connect() 
C)  accept() 
D)  next()

Question 17

You should not use a ______ to connect to a web server.

Accepted Answer

A)  Packet 
B)  Socket 
C)  URLConnection 
D)  HttpURLConnection 
A)  Packet 
B)  Socket 
C)  URLConnection 
D)  HttpURLConnection

Question 18

The HTTP command PUT ____________.

Accepted Answer

A)  returns the requested item. 
B)  stores an item on the client. 
C)  stores an item on the server. 
D)  supplies input to a client-side command. 
A)  returns the requested item. 
B)  stores an item on the client. 
C)  stores an item on the server. 
D)  supplies input to a client-side command.

Question 19

To retrieve the response code from a URLConnection object, you need __________________.

Accepted Answer

A)  to cast the HttpURLConnection object to the URLConnect subclass. 
B)  to cast the URLConnection object to the HttpURLConnect subclass. 
C)  to use the getInputStream() method. 
D)  to use the getCodeResponse() method. 
A)  to cast the HttpURLConnection object to the URLConnect subclass. 
B)  to cast the URLConnection object to the HttpURLConnect subclass. 
C)  to use the getInputStream() method. 
D)  to use the getCodeResponse() method.

Question 20

To retrieve the response code and message from an HttpURLConnection object, you need __________________.

Accepted Answer

A)  to use the getInputStream() method. 
B)  to use the getURLConnection() method. 
C)  to use the getResponseCode() and getResponseMessage() methods. 
D)  to use the getCodeResponse() method. 
A)  to use the getInputStream() method. 
B)  to use the getURLConnection() method. 
C)  to use the getResponseCode() and getResponseMessage() methods. 
D)  to use the getCodeResponse() method.

Exam 21: Internet Networking

Write a code fragment that connects to a server running on gorge.divms.uiowa.edu at port 2345 and reads one line of text sent by the server.

A ______ is an object that encapsulates a TCP connection.

____ has built-in provisions for retrying incomplete transmissions.

The HTTP command DELETE ____________.

The _________ class makes it easy to fetch a file from a web server.

What does the acronym SMTP stand for?

The HTTP command OPTIONS ____________.

The following command: Java pgmName hostname / Lets you retrieve any item from a web server. The slash means:

For test protocols, turn the socket streams into:

The HTTP response code 404 means _______________.

Show the command line that establishes a telnet connection with echo server (port 7) running on the computer www.eecs.utoledo.edu.

What are the steps involved in designing a client/server application? I. Design a communication protocol. II. Test the server with the Telnet program. III. Implement the server program. IV. Write a client program.

Which of the following is not an HTTP command?

Sending commands over a socket connection is ___________.

What does the following if statement do? If (code == HttpURLConnetion.HTTP_OK)

The ______ method of the ServerSocket class waits for a client connection.

You should not use a ______ to connect to a web server.

The HTTP command PUT ____________.

To retrieve the response code from a URLConnection object, you need __________________.

To retrieve the response code and message from an HttpURLConnection object, you need __________________.

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