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AP Computer Science Videos 113 videos

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AP Computer Science 2.1 Inheritance, Abstraction, and Polymorphism 175 Views


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Description:

AP Computer Science 2.1 Inheritance, Abstraction, and Polymorphism. Which of the following is not true about interfaces and abstract classes?

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English Language

Transcript

00:00

Thank you We sneak And here's her shmoop du jour

00:05

brought to you by abstraction providing away from manic artists

00:09

to believe they are creating art Okay which of the

00:13

following is not true about interfaces and abstract classes Let

00:20

him mumbling don't uncle choi say seems to be true

00:24

purpose of an abstract classes to provide a hybrid between

00:27

a concrete class and an interface it can implement some

00:30

methods and choose not painful and others while an interface

00:32

can't implement any and a regular class must implement all

00:37

also today all right choice b seems like it might

00:39

be Our answer statement is actually office and the rules

00:42

of abstract and interfaces abstract classes can contain instance variables

00:47

while interfaces can't let's check the other choices though to

00:50

make sure we've got the right one here All right

00:53

choice sees true both abstract classes and interfaces can have

00:57

final variables and choice Dee is also true You can

01:00

only create instances of concrete classes and finally we see

01:03

that he is true Though it is somewhat subjective this

01:06

outlines the basic use are abstract classes and interface is

01:10

the correct answer is b that's We shouldn't give abstract

01:12

art it's a break We can kind of see the 00:01:15.415 --> [endTime] fish in this painting

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