
8.CT.a.1 - Super Mario
Authored by Vincent Maxwell
Computers
8th Grade
Used 5+ times

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30 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the difference between a constant and a variable
A variable can change, a constant stays the same
A constant can change, a variable stays the same
There are no differences
A constant constantly updates, a variable varies its updates
Answer explanation
In modern javascript a constant is declared like so:
const SPEED = 5;
Whereas a variable is declared like so:
var speed = 5;
A constant cannot be changed, but a variable can. In our older version of javascript the "const" declaration doesn't exist yet, so we put a comment before the variable to define them as constants for ourselves.
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
The GROUND_LEVEL constant defines where sprites in the game world stand on the _-____ .
Answer explanation
The ground level defines the y-coordinate we use to set where sprites cannot fall through
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
The MAX_JUMP_HEIGHT defines how high a sprite can jump on the _-_________ .
Answer explanation
The max height jump defines the y-coordinate we use to set where sprites cannot jump higher than
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
How do you declare a variable in Javascript? Select all correct choices
var intAge = 13;
var age(5);
var strName = 'Thomas';
name = "Thomas";
Answer explanation
Strings (text) can be defined like so:
var name = "Thomas";
Integers (number) can be defined like so:
var age = 5;
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
SPEED is used to determine mario's sprite object's ...
.velocityX
.velocityY
.velocityX and .velocityY
the .x and .y coordinates
Answer explanation
In our code, we use SPEED to set the .velocityX and .velocityY of the Mario object. Whether Mario jumps or runs, he's always using the same speed declared by the constant.
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Why will this code not run?
there has to be a number in the variable
there are supposed to be no spaces in the variable label
there are no caps in variables
Answer explanation
A variable label must never have a space!
7.
FILL IN THE BLANK QUESTION
45 sec • 1 pt
A _______ is a piece of memory that can contain a data value.
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