Ch 4

Question 1

Features common to OO languages

Answer 1

Classes, instances, message passing, methods, inheritance

Question 2

Immutable

Answer 2

Immutable means that once set, the value of the data field cannot subsequently be changed.

Question 3

Interface

Answer 3

An interface defines the protocol for certain behavior but does not provide an implementation.

Question 4

Mutual recursion

Answer 4

When two or more classes have references to the other.

Question 5

Inner class

Answer 5

A class definition written inside of another.

Question 6

Visibility modifiers

Answer 6

The keywords public and private that are used to control the visibility, and hence the manipulation, of class features.

Question 7

Getter and setter functions

Answer 7

Sometimes termed accessors and mutators, these are methods that provide access to data fields. By using methods rather than providing direct access, programmers have greater control over the way data is modified and where it can be used.

Question 8

Constant, or immutable, data fields

Answer 8

These data fields are guaranteed to not change during the course of execution.

Question 9

Class data fields

Answer 9

The particular paradox arises over the initialization data fields that are shared in common among all instances of a class.