Question 1

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

Accepted Answer

A)   objects
B)   strings
C)   integers
D)   Boolean valuesE) B) and C)
F) All of the above

Question 2

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.E) B) and C)
F) A) and B)

Question 3

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 typeE) A) and B)
F) A) and C)

Question 4

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 5

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 theseE) B) and C)
F) A) and C)

Question 6

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 variableE) A) and B)
F) A) and C)

Question 7

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 8

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.E) B) and D)
F) None of the above

Question 9

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

Accepted Answer

A)   enumerated
B)   enum type
C)   ENUM
D)   enumE) A) and D)
F) B) and C)

Question 10

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 RectangleE) None of the above
F) C) and D)

Question 11

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 classE) All of the above
F) B) and C)

Question 12

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

Accepted Answer

A)   0
B)   -1
C)   null
D)   falseE) A) and B)
F) A) and C)

Question 13

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)   indexE) A) and B)
F) B) and D)

Question 14

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 relationshipE) A) and B)
F) All of the above

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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.E) A) and D)
F) C) and D)

Question 17

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 18

enum constants have a toString method.

Accepted Answer

A) True 
 B)False

Question 19

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 situationE) A) and B)
F) A) and C)

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)   3E) None of the above
F) A) and B)

Exam 8: A Second Look at Classes and Objects

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());

Correct AnswerverifiedShow Answer

enum constants have a toString method.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not true about static methods?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When the this variable is used to call a constructor__________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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