Module 09 - Arrays

Question 1

What is array idioms?

Answer 1

A common or accepting way of expressing a particular idea or pattern in a code

Question 1

What happens when you initialize an array?

Answer 1

You define its size and provide initial values for its elements

Question 2

What is an array?

Answer 2

An array is like a list where you can store multiple items of the same type, such as numbers or strings, under a single name.

Question 3

Values in an array are ordered in sequence. T or F

Answer 3

True

Question 4

Each value stored in an array is called ‘component’. T or F

Answer 4

False. It’s element

Question 5

Does every array have a name?

Answer 5

Yes

Question 6

Each element is accessed through a unique index. T or F

Answer 6

True

Question 7

Index is not a whole number starting from 0

Answer 7

False

Question 8

What is a button variable?

Answer 8

Refers to a bundle of information within a single variable

Question 9

What is dot notation?

Answer 9

To access properties of an object

Question 10

How do you use dot notation?

Answer 10

Use the name of the variable, followed by a dot, followed by a field name

Example: text(button.label, textX, textY);

Question 11

When counting elements in an array, what do you start with?

Answer 11

Always starts at 0 through 1

Question 12

What does updating an array mean?

Answer 12

Means to modify the values stored in an array

Question 13

How do you change the value of an element in an array?

Answer 13

You specify it

Example: let colour = [“brown”, white”, “blue”, “green”, “red”];

CHANGE INSTRUCT: colour[2] = “pink”

NOW: let colour = [“brown”, “white”, “pink”, “green”, “red”];