Question 1

When you write an enumerated type declaration, you

Accepted Answer

A)   are actually creating a special kind of class.
B)   do not enclose the enum constants in quotation marks.
C)   should use the standard convention of writing the enum constants in uppercase.
D)   All of the aboveE) A) and C)
F) B) and C)

Question 2

Overloading is

Accepted Answer

A)   writing a method that does too much processing.
B)   writing a program that is too large to fit in memory.
C)   having two or more methods with the same name, but different signatures.
D)   having two or more methods with the same signature.E) A) and C)
F) A) and D)

Question 3

A static field is created by placing the key word static

Accepted Answer

A)   after the access specifier and 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.E) C) and D)
F) A) and B)

Question 4

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

Accepted Answer

A)   This is a public method that accepts a Stock object as its argument and returns a boolean value.
B)   This is a public method that returns a reference to a String object.
C)   This is a private method that receives two objects from the Stock class and returns a boolean value.
D)   This is a private method that returns a boolean value.E) All of the above
F) C) and D)

Question 5

You may use this to compare two enum data values.

Accepted Answer

A)   the ordinal method
B)   the ==, >, and 
C)   the equals and compareTo methods
D)   the moreThan, lessThan, and equalsTo methodsE) A) and C)
F) A) and B)

Question 6

By default, a reference variable that is an instance field is initialized to the value

Accepted Answer

A)   null.
B)   0.
C)   void.
D)   static.E) A) and B)
F) None of the above

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

CRC stands for

Accepted Answer

A)   Class, Recyclability, Collaborations.
B)   Class, Redundancy, Collections.
C)   Class, Responsibilities, Collaborations.
D)   Code, Reuse, Constancy.E) B) and C)
F) A) and C)

Question 9

Assuming the following declaration exists:
Enum Tree { OAK, MAPLE, PINE }
What will the following code display?
System.out.println(Tree.OAK) ;

Accepted Answer

A)   OAK
B)   Tree.OAK
C)   0
D)   1E) None of the above
F) B) and C)

Question 10

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)   You cannot use the this variable in a constructor call.E) B) and C)
F) None of the above

Question 11

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 12

A declaration for an enumerated type begins with this key word.

Accepted Answer

A)   enumerated
B)   enum type
C)   ENUM
D)   enumE) B) and C)
F) All of the above

Question 13

The names of the enum constants in an enumerated data type must be enclosed in quotation marks.

Accepted Answer

A) True 
 B)False

Question 14

The key word this is the name of a reference variable that an object can use to refer to itself.

Accepted Answer

A) True 
 B)False

Question 15

If you write a toString method for a class, Java will automatically call the method any time you concatenate an object of the class with a string.

Accepted Answer

A) True 
 B)False

Question 16

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)   All of the above.E) None of the above
F) B) and C)

Question 17

A class's static methods do not operate on the fields that belong to any instance of the class.

Accepted Answer

A) True 
 B)False

Question 18

When a field is declared static, there will be

Accepted Answer

A)   a copy of the field for each method in the class.
B)   a copy of the field in each class object.
C)   only one copy of the field in memory.
D)   two reference copies of the field for each method in the class.E) A) and C)
F) All of the above

Question 19

The JVM periodically performs this process to remove unreferenced objects from memory.

Accepted Answer

A)   memory shuffling
B)   system restore
C)   garbage collection
D)   memory sweepingE) A) and C)
F) A) and D)

Question 20

To get the name of a calling enum constant,

Accepted Answer

A)   simply use the enum constant in the statement.
B)   use the ordinal method.
C)   use the displayName method.
D)   use the toString method.E) A) and C)
F) A) and B)

Exam 6: A Second Look at Classes and Objects

The JVM periodically performs this process to remove unreferenced objects from memory.

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A declaration for an enumerated type begins with this key word.

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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 you write an enumerated type declaration, you

Correct AnswerverifiedShow Answer

A class's static methods do not operate on the fields that belong to any instance of the class.

Correct AnswerverifiedShow Answer

A static field is created by placing the key word static

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When the this variable is used to call a constructor

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By default, a reference variable that is an instance field is initialized to the value

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Assuming the following declaration exists: Enum Tree { OAK, MAPLE, PINE } What will the following code display? System.out.println(Tree.OAK) ;

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CRC stands for

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If you write a toString method for a class, Java will automatically call the method any time you concatenate an object of the class with a string.

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You may use this to compare two enum data values.

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The key word this is the name of a reference variable that an object can use to refer to itself.

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Overloading is

Correct AnswerverifiedShow Answer

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

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When a field is declared static, there will be

Correct AnswerverifiedShow Answer

The names of the enum constants in an enumerated data type must be enclosed in quotation marks.

Correct AnswerverifiedShow Answer

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

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To get the name of a calling enum constant,

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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