Chapter 9

Question 1

To prevent a class from being instantiated, _____________________

Answer 1

use the private modifier on the constructor

Question 2

Given the declaration Circle[] x = new Circle[10], which of the following statement is most accurate?

Answer 2

x contains a reference to an array and each element in the array can hold a reference to a Circle object.

Question 3

Suppose the xMethod() is invoked from a main method in a class as follows, xMethod() is \_\_\_\_\_\_\_\_\_ in the class.
public static void main(String[] args) {
     xMethod();
}

Answer 3

a static method

Question 4

Given the declaration Circle x = new Circle(), which of the following statement is most accurate.

Answer 4

x contains a reference to a Circle object.

Question 5

Variables that are shared by every instances of a class are __________.

Answer 5

class variables
(AKA Static)

Question 6

X Suppose the xMethod() is invoked in the following constructor in a class, xMethod() is \_\_\_\_\_\_\_\_\_ in the class.
public MyClass() {
     xMethod();
}

Answer 6

a static method or an instance method

Question 7

______ is a construct that defines objects of the same type.

Answer 7

A class

Question 8

__________ represents an entity in the real world that can be distinctly identified.

Answer 8

An object

Question 9

The keyword __________ is required to declare a class.

Answer 9

class

Question 10

________ is invoked to create an object.

Answer 10

A constructor

Question 11

You can declare two variables with the same name in __________.

Answer 11

different methods in a class

Question 12

A method that is associated with an individual object is called __________.

Answer 12

an instance method

Question 13

An object is an instance of a __________.

Answer 13

class

Question 14

The default value for data field of a boolean type, numeric type, object type is ___________, respectively.

Answer 14

false, 0, null

Question 15

To declare a constant MAX_LENGTH as a member of the class, you write

Answer 15

final static double MAX_LENGTH = 99.98;