ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


AP Computer Science A Videos 108 videos

AP Computer Science 3.5 Classes and Objects
186 Views

AP Computer Science: Classes and Objects Drill 3, Problem 5. Which of the following is not an object?

AP Computer Science 3.4 Classes and Objects
176 Views

AP Computer Science: Classes and Objects Drill 3, Problem 4. Which of the following are objects?

AP Computer Science 4.1 Classes and Objects
174 Views

AP Computer Science 4.1 Classes and Objects. Which of the answers is the best definition of a postcondition?

See All

AP Computer Science 2.4 Classes and Objects 182 Views


Share It!


Description:

AP Computer Science: Classes and Objects Drill 2, Problem 4. Which of the following is not a legal method call?

Language:
English Language

Transcript

00:00

Sorry And here's your smoke Dude you're brought to you

00:05

by crackpot marketing schemes Whether you need a comically huge

00:09

pencil emblazoned with your logo or brandon toilet seat covers

00:15

Let a crackpot marketing scheme change the way you do

00:17

business All right consider the following declarations Find a bee

00:30

Which of the following is not a legal method Call

00:34

shmoop yeah but near the potential Answer a lot of

00:39

roman numerals and remember roman soldier of walk into a

00:43

bar with girlfriend orders five years Okay sounds like we're

00:47

being asked which of the given method calls art in

00:50

fallon But what on earth are method calls and when

00:53

will you ever use it Well typically large java project

00:56

will be split up into separate classes classes to make

01:00

code more manageable We might have one class handling saving

01:04

and loading a file another class handling networking class handling

01:08

graphics and so on That way when there's a bug

01:11

in a certain function or the code needs to be

01:13

modified all the relevant code is in one place The

01:16

main class will then call various methods from other classes

01:19

is needed right Well small programming projects may not need

01:23

so many separate classes but as things get more complicated

01:26

while it helps a great deal the thing about how

01:28

small company might be if just one or two people

01:31

handled everything in a garage Well that's perfectly manageable because

01:35

the relatively small operation with a little work to do

01:37

but a large company of dozens or hundreds of people

01:40

would have to be split into departments each with different

01:43

tasks like think about how hard it is for amazon

01:45

the ship product right And when it's time to do

01:48

something with the same marketing you'd have to give him

01:50

a call Yes hello marketing department We need to get

01:53

our name out there and i'm thinking pigeon sweaters will

01:56

put thousands of tiny sweaters on pigeons all over the

01:59

city with our branding all over them they'll be everywhere

02:02

can fail right We're calling elsewhere to make a request

02:05

is the same thing we're doing with method calls Yes

02:08

with fewer pigeon sweat and now let's look at our

02:11

options and figure out which are invalid Option one tries

02:15

to call a method with object see but see is

02:17

just a null object and hasn't been specified as a

02:20

new anything so option one won't work at all Option

02:24

two tries to call the shed leaves method with object

02:26

b which looks like it's gonna work Object is in

02:29

oak object and the shed leaves method resides within the

02:33

class Looking good Option to option three tries to call

02:37

the shed leaves method with object a but a is

02:39

a pine object The pine class doesn't contain a shed

02:43

leaves method It's only got shed needles Option three is

02:47

not going to cut it That makes our answer D

02:50

because options one of three are invalid and so our 00:02:55.383 --> [endTime] pigeon sweaters

Related Videos

AP Computer Science 1.2 GridWorld Case Study and APIs
493 Views

AP Computer Science 1.2 GridWorld Case Study and APIs. What is the direction of the actor?

AP Computer Science 1.4 Standard Algorithms
200 Views

AP Computer Science 1.4 Standard Algorithms. How many times will mystery be called for mystery(n) for n > 1?

AP Computer Science 2.3 Classes and Objects
191 Views

AP Computer Science 2.3 Classes and Objects. Which of the following is correct implementation of the Country class?

AP Computer Science 3.4 Inheritance, Abstraction, and Polymorphism
204 Views

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 4.2 Standard Algorithms
191 Views

AP Computer Science 4.2 Standard Algorithms. What kind of algorithm is the following?