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AP Computer Science 2.1 Inheritance, Abstraction, and Polymorphism 170 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?
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
Full Transcript
- 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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