Quiz 5

Exceptions allow code to indicate an error occurred without specifying the details of handling that error. This is ____.

• Abstraction

• Inheritance

• Encapsulation

• Polymorphism

The keyword used to produce a new Exception is ____.

• handle

• launch

• start

• throw

The following exception does not need to be caught:

• ClassNotFoundException

• FileNotFoundException

• IOException

• NullPointerException

Within Java, files are represented as ____.

• streams

• exceptions

• fountains

• writer

Implementing the ____ interface allows objects of a class to be written/read directly to/from files.

• Writable

• Comparable

• Implementable

• Serializable

Which of the following classes writes binary data to a file?

• DataInputStream

• DataOutputStream

• Filewriter

• PrintWriter

Assuming a class is properly implemented, if x.hashCode() == y.hashCode(), then ____.

• x.equals(y) == true

• x.equals(y) == false

• It is uncertain

• NullPointerException

If x.compareTo(y) returns a negative number, then ____.

• x.hashCode() < y.hashCode()

• x.hashCode() > y.hashCode()

• x.hashCode() == y.hashCode()

• There is no correlation between compareTo() and hashCode()