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AP Computer Science A Videos 108 videos
AP Computer Science: Classes and Objects Drill 3, Problem 5. Which of the following is not an object?
AP Computer Science: Classes and Objects Drill 3, Problem 4. Which of the following are objects?
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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?
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
Full Transcript
- 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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