Java-Chapter 10 Exam

Which of the following best describes a syntax error?

• An error detected at compile-time, meaning the programmer has not followed the Java syntax rules when coding

• An error detected at run-time, meaning the programmer has written valid Java statements that make no sense

• An error that happens when the user enters unexpected data at an input prompt

• An error that allows your program to build and run, but will eventually crash the program

Which of the following best describes an exception?

• An error that happens at compile-time because your Java code does not follow Java syntax rules

• An error that happens at run-time because your Java code has attempted to do something illegal

• A problem in your design that results in the program running without errors but behaving strangely

• An error that happens at compile-time because you have not considered all kinds of possible user input

Which of the following exceptions happens when you try to call a method on a null reference variable?

• IndexOutOfBoundsException

• ArithmeticException

• NullPointerException

• IllegalArgumetnException

Which of the following exceptions happens when you try to perform an integer divide-by-zero operation?

• IllegalArgumentException

• NumberFormatException

• DivisionException

• ArithmeticException

Which of the following exceptions would happen if you called charAt(5) on a string object that was 4 characters long?

• IndexOutOfBoundsException

• NullPointerException

• ArithmeticException

• LengthException

Given the exception message below, what can you tell about the nature of the exception? Exception in thread "main" java.lang.NullPointerException at Mystery.main(Mystery.java:11)

• The exception type is a NullPointerException

• The exception happened in the "Mystery.java" source file

• The exception happened on line 11 in the source file

• All of these are true

When an exception happens in your main() method, what happens if no other exception-handling code has been added?

• The program displays a stack trace message and then continues

• The program halts immediately and displays a stack trace

• The program continues without any visible sign of the error

• It depends on the nature of the exception

If your program has no syntax errors and no exceptions, what else could go wrong?

• All of these are true

• Your program might not do what you expected due to a logical error

• Your program might not do what the customer wanted

• Your program might work correctly but have usability problems (too difficult to use)

When writing exception-handling code, which block goes first, the "try" or the "catch" block?

• catch

• protect

• try

• except

What block should contain error handling code that runs in response to an exception?

• try

• protect

• handle

• catch