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Standard Operations and Algorithms Videos 25 videos

AP Computer Science 4.2 Standard Algorithms
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AP Computer Science 3.5 Review of the Basics
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Using the modulo in arithmetic.

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AP Computer Science 2.1 Classes and Objects 214 Views


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Description:

APCS: Classes and Objects Drill 2, Problem 1. Which of the following is true?

Language:
English Language

Transcript

00:00

Sorry And here's your smoke du jour courtesy of the

00:05

year two billion one hundred forty seven million four hundred

00:09

eighty three thousand six hundred forty seven Mark your calendars

00:13

it's Only about two million will any ums away Yeah

00:18

never that will let me will smith a super class

00:22

vehicle is to be written including the following data members

00:26

and method data members representing a vehicle's year manufacturer model

00:30

and number of wheels Possessor methods get you factoring in

00:36

model All right so which of the following is true

00:40

and hear the pencil answer All right well looks like

00:45

we're building a super glass called vehicle and creating a

00:48

series of variables within it as well as associate id

00:50

access or methods to access those variables Right Right Well

00:55

the entire point of an accessory method is having it

00:57

act as a middleman that retrieves the data held from

01:00

a private variable So we can already cross out any

01:02

potential answers that suggest we declare any variables Public option

01:07

b suggests we declare manufacturer to be a private inner

01:10

jer Well the private bitch is right on the money

01:13

but an imager isn't gonna work We'll need a string

01:16

to store text right there Watching d says model should

01:20

be either a private string or public imager to represent

01:24

a model number We already know that a public variables

01:27

no good But what about private strength Well being that

01:31

we're representing a model number and image it would be

01:33

preferable here Intend your yeah but wait Couldn't least or

01:37

a model number is a string Well it'd just be

01:40

a string and numbers instead of an imager But all

01:42

in all would it work practically the same right Maybe

01:47

Well if we know that our model number variable will

01:50

on ly be storing digits it's a little wiser to

01:53

use an imager Not only is it impossible to accidentally

01:56

insert text into an imager but the imager data type

01:59

also used a little bit less memory than a small

02:01

strength imager would definitely be the most efficient choice here

02:05

So it's a no on the option e says my

02:08

years should be a private imager right on the money

02:11

and imager would be perfect Thie year will never be

02:14

anything other than a whole number and it will always

02:17

be a low enough number that we can stick with

02:19

the imager data type unless we're still using this program

02:23

in the year two billion one hundred forty seven million

02:25

four hundred three thousand six hundred forty seven which is

02:28

the limit of the energy data type In that case

02:31

let's Make a mill note to come back and do

02:33

a code on it in about two billion years Deal 00:02:37.613 --> [endTime] or no deal

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