Question 1

If a method in a subclass has the same signature as a method in the superclass, the subclass method overrides the superclass method.

Accepted Answer

A) True 
 B)False

Question 2

A __________ member's access is somewhere between public and private.

Accepted Answer

A)  package 
B)  protected 
C)  static 
D)  final 
A)  package 
B)  protected 
C)  static 
D)  final

Question 3

When a subclass overrides a superclass method, only the subclass's version of the method can be called with a subclass object.

Accepted Answer

A) True 
 B)False

Question 4

In the following code, which line in ClassA has an error? Line 1 public interface MyInterface
Line 2 {
Line 3 int FIELDA = 55;
Line 4 public int methodA(double);
Line 5 }
Line 6 public class ClassA implements MyInterface
Line 7 {
Line 8 FIELDA = 60;
Line 9 public int methodA(double) { }
Line 10 }

Accepted Answer

A)  Line 6 
B)  Line 7 
C)  Line 8 
D)  Line 9 
A)  Line 6 
B)  Line 7 
C)  Line 8 
D)  Line 9

Question 5

In the following code, what is missing from ClassA? Line 1 public interface MyInterface
Line 2 {
Line 3 int FIELDA = 55;
Line 4 public int methodA(double);
Line 5 }
Line 6 public class ClassA implements MyInterface
Line 7 {
Line 8 FIELDA = 60;
Line 9 public int methodB(double) { }
Line 10 }

Accepted Answer

A)  It does not override methodA. 
B)  It does not have a constructor. 
C)  It does not overload methodA. 
D)  Nothing is missing. It is a complete class. 
A)  It does not override methodA. 
B)  It does not have a constructor. 
C)  It does not overload methodA. 
D)  Nothing is missing. It is a complete class.

Question 6

Which of the following is true about protected access?

Accepted Answer

A)  Protected members may be accessed by methods in the same package or in a subclass, even when the subclass is in a different package. 
B)  Protected members may be accessed by methods in the same package or in a subclass, but only if the subclass is in the same package. 
C)  Protected members cannot be accessed by methods in any other classes. 
D)  Protected members are actually named constants. 
A)  Protected members may be accessed by methods in the same package or in a subclass, even when the subclass is in a different package. 
B)  Protected members may be accessed by methods in the same package or in a subclass, but only if the subclass is in the same package. 
C)  Protected members cannot be accessed by methods in any other classes. 
D)  Protected members are actually named constants.

Question 7

An abstract class is not instantiated itself but serves as a superclass for other classes.

Accepted Answer

A) True 
 B)False

Question 8

All fields declared in an interface __________.

Accepted Answer

A)  have protected access 
B)  must be initialized in the class implementing the interface 
C)  have private access 
D)  are treated as final and static 
A)  have protected access 
B)  must be initialized in the class implementing the interface 
C)  have private access 
D)  are treated as final and static

Question 9

In the following statement, which is the superclass? public class ClassA extends ClassB implements ClassC

Accepted Answer

A)  ClassA 
B)  ClassB 
C)  ClassC 
D)  cannot tell 
A)  ClassA 
B)  ClassB 
C)  ClassC 
D)  cannot tell

Question 10

Which of the following shows the inheritance relationships among classes in a manner similar to that of a family tree?

Accepted Answer

A)  UML diagram 
B)  CRC card 
C)  flowchart 
D)  class hierarchy 
A)  UML diagram 
B)  CRC card 
C)  flowchart 
D)  class hierarchy

Question 11

Protected class members can be denoted in a UML diagram with the __________ symbol.

Accepted Answer

A)  + 
B)  - 
C)  * 
D)  # 
A)  + 
B)  - 
C)  * 
D)  #

Question 12

If a class contains an abstract method __________.

Accepted Answer

A)  you must create an instance of the class 
B)  the method will only have a header, but not a body, and will end with a semicolon 
C)  the method cannot be overridden in subclasses 
D)  All of these are true. 
A)  you must create an instance of the class 
B)  the method will only have a header, but not a body, and will end with a semicolon 
C)  the method cannot be overridden in subclasses 
D)  All of these are true.

Question 13

__________ tells the Java compiler that a method is meant to override a method in the superclass.

Accepted Answer

A)  @Override 
B)  @Overload 
C)  @Protected 
D)  @Inherited 
A)  @Override 
B)  @Overload 
C)  @Protected 
D)  @Inherited

Question 14

A compiler error will result if an anonymous inner class tries to use a variable that is not final, or not effectively final.

Accepted Answer

A) True 
 B)False

Question 15

If a method in a subclass has the same signature as a method in the superclass, the subclass method __________ the superclass method.

Accepted Answer

A)  inherits 
B)  overloads 
C)  overrides 
D)  implements 
A)  inherits 
B)  overloads 
C)  overrides 
D)  implements

Question 16

The __________ key word is used to call a superclass constructor explicitly.

Accepted Answer

A)  goto 
B)  this 
C)  super 
D)  extends 
A)  goto 
B)  this 
C)  super 
D)  extends

Question 17

When declaring class data members it is best to declare them as __________.

Accepted Answer

A)  private members 
B)  public members 
C)  protected members 
D)  restricted members 
A)  private members 
B)  public members 
C)  protected members 
D)  restricted members

Question 18

What is wrong with the following code? public class ClassB extends ClassA
{
Public ClassB()
{
Int init = 10;
Super(40);
}
}

Accepted Answer

A)  Nothing is wrong with this code. 
B)  The method super is not defined. 
C)  The call to the method super must be the first statement in the constructor. 
D)  No values may be passed to super. 
A)  Nothing is wrong with this code. 
B)  The method super is not defined. 
C)  The call to the method super must be the first statement in the constructor. 
D)  No values may be passed to super.

Question 19

In an inheritance relationship __________.

Accepted Answer

A)  the subclass constructor always executes before the superclass constructor 
B)  the superclass constructor always executes before the subclass constructor 
C)  the constructor with the lowest overhead always executes first regardless of inheritance in subclasses 
D)  the unified constructor always executes first regardless of inheritance 
A)  the subclass constructor always executes before the superclass constructor 
B)  the superclass constructor always executes before the subclass constructor 
C)  the constructor with the lowest overhead always executes first regardless of inheritance in subclasses 
D)  the unified constructor always executes first regardless of inheritance

Question 20

It is not possible for a superclass to call a subclass's method.

Accepted Answer

A) True 
 B)False

If a method in a subclass has the same signature as a method in the superclass, the subclass method overrides the superclass method.

A __________ member's access is somewhere between public and private.

When a subclass overrides a superclass method, only the subclass's version of the method can be called with a subclass object.

In the following code, which line in ClassA has an error? Line 1 public interface MyInterface Line 2 { Line 3 int FIELDA = 55; Line 4 public int methodA(double); Line 5 } Line 6 public class ClassA implements MyInterface Line 7 { Line 8 FIELDA = 60; Line 9 public int methodA(double) { } Line 10 }

In the following code, what is missing from ClassA? Line 1 public interface MyInterface Line 2 { Line 3 int FIELDA = 55; Line 4 public int methodA(double); Line 5 } Line 6 public class ClassA implements MyInterface Line 7 { Line 8 FIELDA = 60; Line 9 public int methodB(double) { } Line 10 }

Which of the following is true about protected access?

An abstract class is not instantiated itself but serves as a superclass for other classes.

All fields declared in an interface __________.

In the following statement, which is the superclass? public class ClassA extends ClassB implements ClassC

Which of the following shows the inheritance relationships among classes in a manner similar to that of a family tree?

Protected class members can be denoted in a UML diagram with the __________ symbol.

If a class contains an abstract method __________.

__________ tells the Java compiler that a method is meant to override a method in the superclass.

A compiler error will result if an anonymous inner class tries to use a variable that is not final, or not effectively final.

If a method in a subclass has the same signature as a method in the superclass, the subclass method __________ the superclass method.

The __________ key word is used to call a superclass constructor explicitly.

When declaring class data members it is best to declare them as __________.

What is wrong with the following code? public class ClassB extends ClassA { Public ClassB() { Int init = 10; Super(40); } }

In an inheritance relationship __________.

It is not possible for a superclass to call a subclass's method.

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Exceptions and Advanced File Io

Java-Fx: Gui Programming and Basic Controls

Java-Fx: Advanced Controls

Java-Fx: Graphics, Effects, and Media

Recursion

Databases

Filters

Exam 10: Inheritance

If a method in a subclass has the same signature as a method in the superclass, the subclass method overrides the superclass method.

A __________ member's access is somewhere between public and private.

When a subclass overrides a superclass method, only the subclass's version of the method can be called with a subclass object.

In the following code, which line in ClassA has an error? Line 1 public interface MyInterface Line 2 { Line 3 int FIELDA = 55; Line 4 public int methodA(double); Line 5 } Line 6 public class ClassA implements MyInterface Line 7 { Line 8 FIELDA = 60; Line 9 public int methodA(double) { } Line 10 }

In the following code, what is missing from ClassA? Line 1 public interface MyInterface Line 2 { Line 3 int FIELDA = 55; Line 4 public int methodA(double); Line 5 } Line 6 public class ClassA implements MyInterface Line 7 { Line 8 FIELDA = 60; Line 9 public int methodB(double) { } Line 10 }

Which of the following is true about protected access?

An abstract class is not instantiated itself but serves as a superclass for other classes.

All fields declared in an interface __________.

In the following statement, which is the superclass? public class ClassA extends ClassB implements ClassC

Which of the following shows the inheritance relationships among classes in a manner similar to that of a family tree?

Protected class members can be denoted in a UML diagram with the __________ symbol.

If a class contains an abstract method __________.

__________ tells the Java compiler that a method is meant to override a method in the superclass.

A compiler error will result if an anonymous inner class tries to use a variable that is not final, or not effectively final.

If a method in a subclass has the same signature as a method in the superclass, the subclass method __________ the superclass method.

The __________ key word is used to call a superclass constructor explicitly.

When declaring class data members it is best to declare them as __________.

What is wrong with the following code? public class ClassB extends ClassA { Public ClassB() { Int init = 10; Super(40); } }

In an inheritance relationship __________.

It is not possible for a superclass to call a subclass's method.

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Exceptions and Advanced File Io

Java-Fx: Gui Programming and Basic Controls

Java-Fx: Advanced Controls

Java-Fx: Graphics, Effects, and Media

Recursion

Databases

Filters