JF S8

What is the danger of catching a generic Exception type as shown below?

• The details of the Exception object ex are too general to be useful.

• An Exception will never occur.

• An ArithmeticException cannot be caught.

• An ArrayIndexOutOfBoundsException cannot be caught.

Which exception is thrown when an application attempts to use null when an object is required?

• NullPointerException

• FileNotFoundException

• ArithmeticException

• ArrayIndexOutOfBoundsException

Each catch block is an exception handler that handles the type of exception indicated by its argument.

• True

• False

What are two advantages of adding print statements for debugging?

• You can identify which methods have been called.

• You can identify compilation errors.

• You can identify runtime errors.

• You can identify the order in which methods have been called.

Testing and debugging are important activities in software development.

• True

• False

Runtime errors can be caught by Java’s exception handling mechanism.

• True

• False

Which two are limitations of an array of primitives (ie: int[] x)?

• The size of the array is fixed during array creation and cannot grow once initialized.

• You cannot overwrite the contents of an array once initialized.

• You can create only one array in a class.

• You need to create your own methods to manipulate array contents.

Which two cannot be stored in an ArrayList?

• Integer

• String

• float

• int

How could you declare an ArrayList so that it can store true or false values?

• ArrayList<true, false> arrList = new ArrayList<>();

• ArrayList<boolean> arrList = new ArrayList<>();

• ArrayList<True, False> arrList = new ArrayList<>();

• ArrayList<Boolean> arrList = new ArrayList<>();

You can access the size of any array by using the array’s “length” property.

• True

• False