AP Computer Science 2.5 Classes and Objects

AP Computer Science 2.5 Classes and Objects. Which of the following is not a legal method of call?

APAP Computer Science
AP Computer ScienceClasses and Objects
Computer ScienceAP Computer Science
LanguageEnglish Language
Program AnalysisAlgorithm Analysis
Test PrepAP Computer Science

Transcript

00:20

Find a people's find o b equals folksy Which of

00:25

the following is not a legal method of cough One

00:29

eight hundred No Okay here we go And here the

00:31

potential answers and roman new rose grows older Walked into

00:36

a bar in order to five years Okay here we

00:39

go All right Sounds like we're being asked which of

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the given method calls are invalid But what on earth

00:46

are method calls And when will you ever use them

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Are typically a large job project will be split into

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separate classes To make code more manageable you might have

00:55

one class handling the saving and loading of files Another

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class handling networking a class handling graphics and someone that

01:03

way When there's a bug in a certain function or

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the code needs to be modified All the relevant codes

01:08

in one place makes sense right Well the main class

01:11

Will then call various methods from other classes as needed

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Okay so small programming project may not need so many

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separate classes but if things get more complicated well it

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helps agree field i think about how a small company

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might be just one or two people handling everything in

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a garage Well that's perfectly manageable because it's a relatively

01:30

small operation with a little work to do but a

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large company of dozens or hundreds of people would have

01:36

to be split into departments each with different test And

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when it's time to do something with same marketing well

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you'd have to give him a call Yes hello marketing

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department We need to get our name out there and

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i'm thinking pigeon sweaters Ooh well well put thousands of

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tiny sweaters on pigeons all over the city with a

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branding calling elsewhere to make a request is the same

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thing we're doing with method calls just with fewer pigeons

02:00

Sweater anyhow let's look at our options and figure out

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which your invalid option one tries to call of meth

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that would object c but see is just a noel

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object and hasn't been specified as a new anything option

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One won't work at all Option two tries to call

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the shed leaves method with object b which looks like

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it's gonna work Object b is in book object and

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the shed leaves method resides within the low class looking

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good options Option three tries to call the shed leaves

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method Thanks but object is a pine object with behind

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Class doesn't contain a shed leaves method It's only got

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shed needles Option three is not going to cut it

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That makes our answer D because i'm on one and 00:02:39.42 --> [endTime] three are talent and so are pigeons