Question 1

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. A

Question 2

_____________ attempts reliable delivery of data, with retries if there are failures. It also notifies the sender whether or not the attempt succeeded.

Accepted Answer

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

Question 3

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 A

Question 4

Suppose that sock refers to a TCP socket connected to another machine, and in is aScanner. Which code sends the string "Who is there?" to the other machine, receives the return answer, and then prints it?

Accepted Answer

A)  PrintWriter pw = new PrintWriter(sock.getOutputStream().println("Who is there?"));
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine()); 
B)  PrintWriter pw = new PrintWriter(sock.getInputStream());
pw.println("Who is there?");
pw.flush();
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine()); 
C)  PrintWriter pw = new PrintWriter(sock.getOutputStream());
pw.flush("Who is there");
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine()); 
D)  PrintWriter pw = new PrintWriter(sock.getOutputStream());
pw.println("Who is there?");
pw.flush();
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine()); 
A)  PrintWriter pw = new PrintWriter(sock.getOutputStream().println("Who is there?"));
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine()); 
B)  PrintWriter pw = new PrintWriter(sock.getInputStream());
pw.println("Who is there?");
pw.flush();
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine()); 
C)  PrintWriter pw = new PrintWriter(sock.getOutputStream());
pw.flush("Who is there");
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine()); 
D)  PrintWriter pw = new PrintWriter(sock.getOutputStream());
pw.println("Who is there?");
pw.flush();
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine());

Question 5

Which of the following protocols is used to send email messages?

Accepted Answer

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

Question 6

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

Question 7

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 8

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 9

To connect to the HTTP port (80) of the server yahoo.com, you use:

Accepted Answer

A)  Socket s = new Socket(80, yahoo.com); 
B)  Socket s = connect("yahoo.com", 80); 
C)  Socket s = new Socket("yahoo.com", 80); 
D)  java yahoo.com 80 
A)  Socket s = new Socket(80, yahoo.com); 
B)  Socket s = connect("yahoo.com", 80); 
C)  Socket s = new Socket("yahoo.com", 80); 
D)  java yahoo.com 80

Question 10

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 11

The HTTP command GET ____________.

Accepted Answer

A)  returns the requested item. 
B)  supplies input to a server-side command. 
C)  requests input from the server-side command. 
D)  supplies input to a client-side command. 
A)  returns the requested item. 
B)  supplies input to a server-side command. 
C)  requests input from the server-side command. 
D)  supplies input to a client-side command.

Question 12

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 13

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 14

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.

Question 15

__________________ is the protocol that defines communication between Web browsers and Web servers.

Accepted Answer

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

Question 16

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();
}

Question 17

____________________ has no provision for retrying an incomplete transmission.

Accepted Answer

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

Question 18

In a communication protocol, can the sender indicate how many bytes are contained in the request?

Accepted Answer

A)  Yes, the web server does that at the end of the GET request. 
B)  Yes, the web browser does that in POST request. 
C)  Yes, the web browser does that at the end of the HTTP header. 
D)  No, the sender can't indicate how many bytes are contained in the request. 
A)  Yes, the web server does that at the end of the GET request. 
B)  Yes, the web browser does that in POST request. 
C)  Yes, the web browser does that at the end of the HTTP header. 
D)  No, the sender can't indicate how many bytes are contained in the request.

Question 19

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 20

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

Exam 22: Internet Networking

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

_____________ attempts reliable delivery of data, with retries if there are failures. It also notifies the sender whether or not the attempt succeeded.

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

Suppose that sock refers to a TCP socket connected to another machine, and in is aScanner. Which code sends the string "Who is there?" to the other machine, receives the return answer, and then prints it?

Which of the following protocols is used to send email messages?

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

Which of the following statements is correct?

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

To connect to the HTTP port (80) of the server yahoo.com, you use:

Which of the following is not an HTTP command?

The HTTP command GET ____________.

What does the acronym POP stand for?

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

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

__________________ is the protocol that defines communication between Web browsers and Web servers.

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.

____________________ has no provision for retrying an incomplete transmission.

In a communication protocol, can the sender indicate how many bytes are contained in the request?

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

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

Introduction

Using Objects

Implementing Classes

Fundamental Data Types

Decisions

Loops

Arrays and Array Lists

Designing Classes

Inheritance

Interfaces

Inputoutput and Exception Handling

Object-Oriented Design

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Graphical User Interfaces

Streams and Binary Inputoutput

Multithreading

Relational Databases

XML

Web Applications

Filters