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AP Computer Science A Videos 108 videos
AP Computer Science 2.3 Classes and Objects. Which of the following is correct implementation of the Country class?
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AP Computer Science 2.3 Inheritance, Abstraction, and Polymorphism 169 Views
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Description:
AP Computer Science 2.3 Inheritance, Abstraction, and Polymorphism. Which of the following is false?
Transcript
- 00:00
Thank you We sneak and here's your smoke Do george
- 00:05
brought to you by way give up our we supposed
- 00:09
to keep thinking of all these puns Wait just All
- 00:15
right consider the time class public land private our minutes
- 00:23
For many things alright we would like to write a
Full Transcript
- 00:25
subclass twenty four hour time with added functionality in order
- 00:30
to meet all of your international travel needs which of
- 00:33
the following is false true let's go through well choice
- 00:41
a states that the subclass will inherit the basic functionality
- 00:46
from its super class This is the basic definition of
- 00:49
what a subclass does so must be true He is
- 00:54
also true Because subclass is inherit all of their super
- 00:57
class methods Those super class methods can be performed on
- 01:01
subclass objects You can also say that choice see is
- 01:04
true because some plus objects can always be stored inside
- 01:07
of their super classes but not the other way around
- 01:10
Well choice t seems like it might be falls It
- 01:13
states that twenty four hour time methods can access time
- 01:17
data members well let's Look at the time data method
- 01:21
well all three of them are declared as private recalled
- 01:24
it Outside classes never access private data fields even some
- 01:28
classes over inherit all the private data They could only
- 01:31
excess them through getters All right well seems like these
- 01:37
are answer but let's See why Choice he's True it
- 01:41
states that the print method in time can be overridden
- 01:44
by different new print method in twenty four hour time
- 01:48
Well this is a given property of sub classes if
- 01:51
they need to change and inherited method to suit their
- 01:54
needs While the computer allows it no promises will be
- 01:58
able to avoid using more bad months in the future 00:02:00.84 --> [endTime] So watch out Look
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