Import java.Util.*;

Which of the following operators can be used to concatenate two String objects in Java?

• .

• &

• |

• +

Delimiters for the class java.util.StringTokenizer can include which of the following?

• ,

• _

• "

• I only

• I and II only

• None

• I, II, and III

• Which of the following streams typically correspond(s) to screen output?

• System.in

• System.out

• System.err

• I, II, and III

• II only

• III only

• II and III only

• Consider the following Java statement.

private static java.io.PrintWriter stdOut =

new java.io.PrintWriter(System.out, true);

At the end of execution of the Java statement, a call to stdOut.println() would result in which of the following?

• Output of a new line character

• Flushing of the output buffer

• I only

• II only

• None

• I and II

• Consider an object stdIn instantiated by the Java statement below.

private static java.io.BufferedReader stdIn =

new java.io.BufferedReader(

new java.io.InputStreamReader(System.in));

Which of the following lines of code can be used to read an integer value from stdIn?

• int value = stdIn.readLine();

• int value = Integer.parseInt(stdIn);

• int value = stdIn.readInteger();

• int value = Integer.parseInt(stdIn.readLine());

• In Java, which of the following classes is (are) unchecked exceptions?

• Error

• Runtime

• IOException

• I, II, and III

• I and III only

• II only

• I and II only

• Consider the following Java program fragment whose lines have been numbered.

1

2 try {

3

4 } catch (Exception e) {

5

6 }

Code that may throw exceptions should appear on line _____, while code that handles exceptions should appear on line _____.

• 1, 3

• 5, 3

• 5, 1

• 3, 5

• If a(n) _____ exception can occur in a method that does not have a catch block to handle that exception, then a throws clause that lists this exception must be part of the method _____.

  • unchecked, header

  • checked, body

  • unchecked, body

  • checked, header

• Which of the following is a Java statement that could be used to throw an IOException?

  • throw IOException();

  • new IOException();

  • IOException();

  • throw new IOException();

• After a breakpoint is hit, a debugger is typically used for which of the following tasks?

• Stepping through method calls, line by line

• Examining a stack trace

• Examining values of variables in the current method

• I and II only

• I and III only

• II only

• I, II, and III

• When using a debugger to step through a program, if the current line contains a method call, which of the following executes the current line and then stops execution before executing the first line in the called method?

  • step over

  • step return

  • resume

  • step into

• Which of the following is true regarding Java applications?

  • They are interpreted by a Web browser.

  • They are compiled into machine code.

  • They are platform-dependent.

  • They are run using a Java interpreter.

• Which of the following is (are) architecture neutral?

• Java byte code

• Machine code