300-quiz01-java
Quiz
•
Computers
•
University
•
Medium
Malcolm McCullough
Used 7+ times
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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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