Question 1

Enumerated types have the __________ method which returns the position of an enum constant in the declaration list.

Accepted Answer

A)  position 
B)  location 
C)  ordinal 
D)  index

Question 2

enum constants have a toString method.

Accepted Answer

A) True 
 B)False

Question 3

An enumerated data type is actually a special type of class.

Accepted Answer

A) True 
 B)False

Question 4

The "has a" relationship is sometimes called a(n) __________ because one object is part of a greater whole.

Accepted Answer

A)  enterprise 
B)  possession 
C)  mutual relationship 
D)  whole-part relationship

Question 5

A class that is defined inside another class is called a(n) __________.

Accepted Answer

A)  nested class 
B)  enumerated class 
C)  inner class 
D)  helper class

Question 6

Java automatically stores a __________ value in all uninitialized static member variables.

Accepted Answer

A)  0 
B)  -1 
C)  null 
D)  false

Question 7

Given the following method header, what will be returned from the method? public Rectangle getRectangle()

Accepted Answer

A)  the address of an object of the Rectangle class 
B)  the values stored in the data members of the Rectangle object 
C)  a graph of a rectangle 
D)  an object of the class Rectangle

Question 8

If the following is from the method section of a UML diagram, which of the statements below is true? + add(object2:Stock) : Stock

Accepted Answer

A)  This is a private method named add that accepts and returns objects of the Stock class. 
B)  This is a private method named Stock that adds two objects. 
C)  This is a public method named add that accepts and returns references to objects in the Stock class. 
D)  This is a public method named Stock that adds two objects.

Question 9

You cannot use the fully-qualified name of an enum constant for ___________.

Accepted Answer

A)  a case expression 
B)  an argument to a method 
C)  a boolean expression 
D)  Any of these

Question 10

If a class has a method named finalize, it is called automatically just before an instance of the class is destroyed by the garbage collector.

Accepted Answer

A) True 
 B)False

Question 11

You cannot use the == operator to compare the contents of __________.

Accepted Answer

A)  objects 
B)  strings 
C)  integers 
D)  Boolean values

Question 12

If you attempt to perform an operation with a null reference variable __________.

Accepted Answer

A)  the resulting operation will always be zero 
B)  the results will be unpredictable 
C)  the program will terminate 
D)  Java will create an object to reference the variable

Question 13

Which of the following is not true about static methods?

Accepted Answer

A)  They are created by placing the key word static after the access specifier in the method header. 
B)  It is necessary for an instance of the class to be created to execute the method. 
C)  They are called directly from the class. 
D)  They are often used to create utility classes that perform operations on data but have no need to store and collect data.

Question 14

If you write a toString method to display the contents of an object, object1, for a class, Class1, then the following two statements are equivalent:
System.out.println(object1);
System.out.println(object1.toString());

Accepted Answer

A) True 
 B)False

Question 15

When the this variable is used to call a constructor__________.

Accepted Answer

A)  it must be the first statement in the constructor making the call 
B)  it can be anywhere in the constructor making the call 
C)  it must be the last statement in the constructor making the call 
D)  None of these. You cannot use the this variable in a constructor call.

Question 16

When an object reference is passed to a method, the method may change the values in the object.

Accepted Answer

A) True 
 B)False

Question 17

When a method's return type is a class, what is actually returned to the calling program?

Accepted Answer

A)  an object of that class 
B)  a reference to an object of that class 
C)  the values in the object that the method accessed 
D)  nothing - the return type is simply for documentation in this situation

Question 18

A static field is created by placing the key word static __________.

Accepted Answer

A)  after the access specifier and the field's data type 
B)  after the access specifier and before the field's data type 
C)  after the field name 
D)  in brackets, before the field's data type

Question 19

A declaration for an enumerated type begins with the __________ key word.

Accepted Answer

A)  enumerated 
B)  enum type 
C)  ENUM 
D)  enum

Question 20

Given the following declaration: enum Tree ( OAK, MAPLE, PINE )
What is the ordinal value of the MAPLE enum constant?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3

Exam 8: A Second Look at Classes and Objects

Enumerated types have the __________ method which returns the position of an enum constant in the declaration list.

enum constants have a toString method.

An enumerated data type is actually a special type of class.

The "has a" relationship is sometimes called a(n) __________ because one object is part of a greater whole.

A class that is defined inside another class is called a(n) __________.

Java automatically stores a __________ value in all uninitialized static member variables.

Given the following method header, what will be returned from the method? public Rectangle getRectangle()

If the following is from the method section of a UML diagram, which of the statements below is true? + add(object2:Stock) : Stock

You cannot use the fully-qualified name of an enum constant for ___________.

If a class has a method named finalize, it is called automatically just before an instance of the class is destroyed by the garbage collector.

You cannot use the == operator to compare the contents of __________.

If you attempt to perform an operation with a null reference variable __________.

Which of the following is not true about static methods?

If you write a toString method to display the contents of an object, object1, for a class, Class1, then the following two statements are equivalent: System.out.println(object1); System.out.println(object1.toString());

When the this variable is used to call a constructor__________.

When an object reference is passed to a method, the method may change the values in the object.

When a method's return type is a class, what is actually returned to the calling program?

A static field is created by placing the key word static __________.

A declaration for an enumerated type begins with the __________ key word.

Given the following declaration: enum Tree ( OAK, MAPLE, PINE ) What is the ordinal value of the MAPLE enum constant?