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AP Computer Science 1.3 Program Development 308 Views
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Description:
AP Computer Science 1.3 Program Development. Which of the following is a correct declaration of one of the classes in the diagram?
Transcript
- 00:00
Thank you We sneak and here's your smoke du jour
- 00:05
Brought to you by inheritance relationships Why yes wealthy old
- 00:09
lady We'd love to help you paint mr grumbles now
- 00:12
All right this question is based on the following class
- 00:14
Higher every diagram no an open air Oh denotes an
Full Transcript
- 00:17
inheritance relationship and a closed arrow to notes a composition
- 00:22
relationship So which of the following is a correct declaration
- 00:26
of one of the classes in the diagram Alright we'll
- 00:30
hear your potential answers Freedom freedom Think All right So
- 00:33
this question is about inheritance and composition relationship which could
- 00:37
be more easily thought of as is and has a
- 00:41
relationship But look at the diagram again Closed down arrows
- 00:45
show inheritance or is a relationship North american country is
- 00:49
a country Asian country is a country european Well these
- 00:55
classes are just more specific versions of the class they're
- 00:59
inheriting from then we have composition or has a relationship
- 01:03
represented by the up Arrow state has a north american
- 01:08
country It belongs to province and territory do too Okay
- 01:13
So back to the question at hand Which of the
- 01:15
potential answers is a correct declaration of the goings on
- 01:18
In a diagram well option a declares north american country
- 01:21
as an independent class Nice try jefferson but we're not
- 01:24
talking about the tyranny of king george We need to
- 01:27
declare north american country as a subclass of country if
- 01:31
we're following the diagram option b says state extends or
- 01:35
inherits from country which isn't correct according to the diagram
- 01:39
In fact it's outright saying that state is a country
- 01:42
and well known on it all our option c has
- 01:46
east asian country extends from asian country which is absolutely
- 01:50
true East asian country is an asian country d says
- 01:55
territory extends from north american country territory is a north
- 02:01
american country and e country extends from north american country
- 02:07
Not even soc is definitely our answer Anyone seen the
- 02:10
nail polish remover No i
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