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300-quiz01-java

Authored by Malcolm McCullough

Computers

University

Used 7+ times

300-quiz01-java
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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If more than one class implements an interface, its methods are ____.

aggregated

public

dependent

polymorphic

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Inheritance is used when the relationship between two classes is a(n) _______ relationship.

"HAS-A"

"PART-OF-A"

"IS-A"

inverse

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The following Syntax is used for?


class Subclass-name extends Superclass-name

{

//methods and fields

}

Polymorphism

Encapsulation

Inheritance

None of the above

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A class that is inherited can be called a ______ .

superclass

subclass

subsetclass

relativeclass

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Class Cat extends Animal. Which is NOT a valid declaration?

Cat x = new Cat();

Animal X = new Animal();

Cat x = new Animal();

Animal x = new Cat();

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Class dog implements the animal interface.

Which IS a valid declaration?

Dog d = new Animal();

Animal d = new Dog();

Animal d = new Animal();

Dog d = new Dog();

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Cat class extends Predator class.

Which of the following must be true?

A Cat object has access to all non private Predator variables and methods.

A Predator object has access to all Cat variables and methods.

Cat c = new Predator();

causes an error.

Predator p = new Cat();

p has access to Cat methods and uses the Predator implementations.

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