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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?
AP Computer Science 1.4 Standard Algorithms. How many times will mystery be called for mystery(n) for n > 1?
AP Computer Science 3.4 Inheritance, Abstraction, and Polymorphism. Which of the following will satisfy the conditional if statement for boo, str,...
AP Computer Science 2.3 Classes and Objects 191 Views
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Description:
AP Computer Science 2.3 Classes and Objects. Which of the following is correct implementation of the Country class?
Transcript
- 00:00
Hurry And here's your smoke du jour brought to you
- 00:05
by monster trucks They're totally crushing it Which of the
- 00:09
following is the correct implementation of the country class They
- 00:13
rebuilt this and here your pencil answers All right you
- 00:21
done reading on country Here we go All right well
Full Transcript
- 00:23
this is certainly a huge mass of a question before
- 00:26
we read every single line and wait for our brains
- 00:28
to leak out of our ears Let's figure out what
- 00:30
we're supposed to be looking for The question asked for
- 00:33
the correct implementation of the country class and the description
- 00:37
suggests it's a class used to hold a few data
- 00:39
members access her methods for that data and a print
- 00:42
match All this stuff right here From this we can
- 00:45
probably assume the question is mostly about the proper way
- 00:49
to set up access or method And we know that
- 00:54
Access or methods They're supposed to be public methods that
- 00:56
access private data So let's just get rid of everything
- 00:59
which doesn't follow that rule first and we'll do that
- 01:02
by driving over the incorrect answers with a monster truck
- 01:05
in option a The strings air private and the access
- 01:07
er message are public That's A good sign so they
- 01:10
can stay for now And same with b option c
- 01:15
Here the strings are public We wouldn't need access or
- 01:21
methods at all if we were using public strings so
- 01:24
option sees that and he too Indeed the strings were
- 01:28
private in the methods or public as they should be
- 01:31
but look more closely The entire class is declared to
- 01:34
be private that leaves and be nearly identical Ah but
- 01:39
wait See it right there Option a is trying to
- 01:42
create a new class with the words new class but
- 01:45
that's not valid syntax to create a new public class
- 01:49
will need to be more like a cousin pee which
- 01:52
says public class instead Yeah nice try but we'll be 00:01:56.576 --> [endTime] going to be
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