AP Computer Science 2.5 Classes and Objects

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

the following is not a legal method of cough One

eight hundred No Okay here we go And here the

potential answers and roman new rose grows older Walked into

a bar in order to five years Okay here we

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

the given method calls are invalid But what on earth

are method calls And when will you ever use them

Are typically a large job project will be split into

separate classes To make code more manageable you might have

one class handling the saving and loading of files Another

class handling networking a class handling graphics and someone that

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

the code needs to be modified All the relevant codes

in one place makes sense right Well the main class

Will then call various methods from other classes as needed

Okay so small programming project may not need so many

separate classes but if things get more complicated well it

helps agree field i think about how a small company

might be just one or two people handling everything in

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

small operation with a little work to do but a

large company of dozens or hundreds of people would have

to be split into departments each with different test And

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

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

department We need to get our name out there and

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

tiny sweaters on pigeons all over the city with a

branding calling elsewhere to make a request is the same

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

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

which your invalid option one tries to call of meth

that would object c but see is just a noel

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

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

the shed leaves method with object b which looks like

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

the shed leaves method resides within the low class looking

good options Option three tries to call the shed leaves

method Thanks but object is a pine object with behind

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

shed needles Option three is not going to cut it

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