Question 1

What does a derived class automatically inherit from the base class?

Accepted Answer

A) instance variables 
B) static variables 
C) public methods 
D) all of the above 
A) instance variables 
B) static variables 
C) public methods 
D) all of the above D

Question 2

A super class is also called a

Accepted Answer

A) derived class 
B) dominant class 
C) sub class 
D) base class 
A) derived class 
B) dominant class 
C) sub class 
D) base class D

Question 3

What is encapsulation?

Accepted Answer

Encapsulation is synonymous with data and detail hiding.Java supports such hiding through the private modifier.

Question 4

If an instance variable is not modified by public,protected or private then it is said to have:

Accepted Answer

A) Package access 
B) Default access 
C) Friendly access 
D) All of the above 
A) Package access 
B) Default access 
C) Friendly access 
D) All of the above

Question 5

What are the different ways in which you can check the class of an Object?

Accepted Answer

The method getClass()as well a

Question 6

Inheritance promotes code ___________.

Accepted Answer

A) reinvention 
B) reuse 
C) repeats 
D) all of the above 
A) reinvention 
B) reuse 
C) repeats 
D) all of the above

Question 7

Define a derived class to represent an alarm clock.Use the Clock class,created in number 2 above,as your base class.

Accepted Answer

/** An alarm clock should include a time

Question 8

You may substitute the keyword this for super()to call a constructor of the derived class.

Accepted Answer

A) True 
 B)False

Question 9

Write Java statements that compares Objects,O1 and O2,using the getClass()method.

Accepted Answer

if(O1.getClass()== O2.getClass

Question 10

Explain the difference between method overloading and method overriding.

Accepted Answer

Overriding refers to redefining a method

Question 11

The class __________ is an ancestor class of all Java classes.

Accepted Answer

A) String 
B) Object 
C) Math 
D) JFrame 
A) String 
B) Object 
C) Math 
D) JFrame

Question 12

If the final modifier is added to the definition of a method,this means:

Accepted Answer

A) The method may be redefined in the derived class. 
B) The method may be redefined in the sub class. 
C) The method may not be redefined in the derived class. 
D) None of the above. 
A) The method may be redefined in the derived class. 
B) The method may be redefined in the sub class. 
C) The method may not be redefined in the derived class. 
D) None of the above.

Question 13

Private methods of the base class are not available for use by derived classes.

Accepted Answer

A) True 
 B)False

Question 14

The keyword extends indicates:

Accepted Answer

A) encapsulation 
B) polymorphism 
C) inheritance 
D) none of the above 
A) encapsulation 
B) polymorphism 
C) inheritance 
D) none of the above

Question 15

A constructor for a derived class begins with an invocation of a constructor for the base class.

Accepted Answer

A) True 
 B)False

Question 16

An object of a derived class has the type of the derived class,and it also has the type of the base class,and more generally,has the type of every one of its ___________ classes.

Accepted Answer

A) descendant 
B) child 
C) ancestor 
D) sub 
A) descendant 
B) child 
C) ancestor 
D) sub

Question 17

Overriding is when a derived class redefines a method from the base class.

Accepted Answer

A) True 
 B)False

Question 18

The call to the base class constructor (super)must always be the last action taken in a constructor definition.

Accepted Answer

A) True 
 B)False

Question 19

A derived class is a class defined by adding instance variables and methods to an existing class.

Accepted Answer

A) True 
 B)False

Question 20

Inheritance refers to a very specialized form of a class.

Accepted Answer

A) True 
 B)False

What does a derived class automatically inherit from the base class?

A super class is also called a

What is encapsulation?

If an instance variable is not modified by public,protected or private then it is said to have:

What are the different ways in which you can check the class of an Object?

Inheritance promotes code ___________.

Define a derived class to represent an alarm clock.Use the Clock class,created in number 2 above,as your base class.

You may substitute the keyword this for super()to call a constructor of the derived class.

Write Java statements that compares Objects,O1 and O2,using the getClass()method.

Explain the difference between method overloading and method overriding.

The class __________ is an ancestor class of all Java classes.

If the final modifier is added to the definition of a method,this means:

Private methods of the base class are not available for use by derived classes.

The keyword extends indicates:

A constructor for a derived class begins with an invocation of a constructor for the base class.

An object of a derived class has the type of the derived class,and it also has the type of the base class,and more generally,has the type of every one of its ___________ classes.

Overriding is when a derived class redefines a method from the base class.

The call to the base class constructor (super)must always be the last action taken in a constructor definition.

A derived class is a class defined by adding instance variables and methods to an existing class.

Inheritance refers to a very specialized form of a class.

Getting Started

Console Input and Output

Flow of Control

Defining Classes I

Defining Classes Ii

Arrays

Console Input and Output

Exception Handling

File IO

Uml and Patterns

Interfaces and Inner Classes

Generics and the Arraylist Class

Linked Data Structures

Collections and Iterators

Swing I

Swing II

Java Never Ends

Recursion

Applets

Filters

Exam 7: Inheritance

What does a derived class automatically inherit from the base class?

A super class is also called a

What is encapsulation?

If an instance variable is not modified by public,protected or private then it is said to have:

What are the different ways in which you can check the class of an Object?

Inheritance promotes code ___________.

Define a derived class to represent an alarm clock.Use the Clock class,created in number 2 above,as your base class.

You may substitute the keyword this for super()to call a constructor of the derived class.

Write Java statements that compares Objects,O1 and O2,using the getClass()method.

Explain the difference between method overloading and method overriding.

The class __________ is an ancestor class of all Java classes.

If the final modifier is added to the definition of a method,this means:

Private methods of the base class are not available for use by derived classes.

The keyword extends indicates:

A constructor for a derived class begins with an invocation of a constructor for the base class.

An object of a derived class has the type of the derived class,and it also has the type of the base class,and more generally,has the type of every one of its ___________ classes.

Overriding is when a derived class redefines a method from the base class.

The call to the base class constructor (super)must always be the last action taken in a constructor definition.

A derived class is a class defined by adding instance variables and methods to an existing class.

Inheritance refers to a very specialized form of a class.

Getting Started

Console Input and Output

Flow of Control

Defining Classes I

Defining Classes Ii

Arrays

Console Input and Output

Exception Handling

File IO

Uml and Patterns

Interfaces and Inner Classes

Generics and the Arraylist Class

Linked Data Structures

Collections and Iterators

Swing I

Swing II

Java Never Ends

Recursion

Applets

Filters