Ex. 41 Word Drills

Question 1

class

Answer 1

Tell Ruby to make a new type of thing

Question 2

object

Answer 2

Two meanings: 1) the most basic type of thing, and 2) any instance of some thing.

Question 3

instance

Answer 3

What you get when you tell Ruby to create a class.

Question 4

@

Answer 4

Inside the functions in a class, @ is a variable for the instance/object being accessed.

Question 5

inheritance

Answer 5

The concept that one class can inherit traits from another class, much like you and your parents.

Question 6

composition

Answer 6

The concept that a class can be composed of other classes as parts, much like how a car has wheels.

Question 7

attribute

Answer 7

A property classes have that are from composition. They are usually variables.

Question 8

is-a

Answer 8

A phrase to say that something inherits from another (as in a “salmon” is-a “fish”).

Question 9

has-a

Answer 9

A phrase to say that something is composed of other things or has a trait (as in a “salmon has-a mouth”).