Exceptions Flashcards
What are the two types of errors that can occur in programs?
- Compile-time errors
- Run-time errors
How can a program handle exceptions?
- Ignore it
- Handle it where it occurs
- Handle it in another place in the program
What happens if an exception is ignored by the program?
The program will terminate abnormally and produce an appropriate message.
What is an ArrayIndexOutOfBoundsException?
An exception that occurs when trying to access an array element that is out of its bounds.
What is the hierarchy of exceptions in Java?
- java.lang.Exception
- java.lang.Throwable
- java.lang.Error
What are the two main subclasses of the Exception class?
- IOException class
- RuntimeException class
Which keyword is used to catch exceptions in Java?
catch
What do you call the code inside a try block?
Protected code
What follows a try block in exception handling?
Either a catch block or a finally block.
What is the purpose of a finally block?
To execute cleanup-type statements regardless of whether an exception occurred.
True or False: A try block can exist without a catch block.
False
What does exception propagation mean?
An exception can be handled at a higher level if it is not appropriate to handle it where it occurs.
What keyword is used to explicitly throw an exception in Java?
throw
What type of exception is thrown when a division by zero occurs?
ArithmeticException
Fill in the blank: The practice of isolating exceptional situations is called _______.
exception handling
What is the outcome if no catch block matches the thrown exception?
The exception is thrown up to the previous method on the call stack.
What happens in the following code: int num[] = {1, 2, 3, 4}; System.out.println(num[5]);?
An ArrayIndexOutOfBoundsException occurs.
What is the significance of the catch statement?
It declares the type of exception being caught.
What happens when an exception occurs in the try block?
The catch block associated with the exception type is executed.
Can a try block have multiple catch blocks?
Yes
What will always execute after a try block, regardless of exceptions?
The finally block
What types of exceptions can be caught in a catch block?
- Specific exception types (e.g., ArithmeticException)
- General exception type (e.g., Exception)
What happens to the program flow if an exception is thrown and not caught?
The current method stops execution and the exception is thrown down to the previous method.
