Basic Data Types

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. Does "Sam" represent a string data type?

A Yes

B No

2. Is 42 a number data type?

A No

B Yes

3. Is True (capital T) valid JavaScript boolean syntax?

A No

B Yes

4. Does removing quotes from text turn it into a variable reference?

A No

B Yes

5. Can a number data type include decimals like 9.99?

A Yes

B No

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1"hello"		AWrong - string values need quotes around them
2true		B42
3A data type for whole or decimal numbers		Cfalse
4A data type with two possible values: true or false		DA string data type that holds text
5let name = Sam;		EA boolean data type representing true or false
6let flag = True;		FWrong - booleans use lowercase true/false

Definitions

string

Fill in the Blanks

Complete each line of code by filling in the missing parts.

let age = __;

let isReady = _____;

let price = ____;

let isDone = ____;

let temp = __;

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A let name = Sam;

B let age = 12;

C let ready = true;

Question 2

A let flag = True;

B let count = 5;

C let word = "Hi";

Question 3

A let age = 25;

B let city = Perth;

C let active = false;

Question 4

A let score = 10;

B let done = False;

C let title = "Hi";

Question 5

A let count = 3;

B let name = "Ana";

C let flag = yes;

Answer Key

Basic Data Types

Section A: Quick Questions

A — Yes

B — Yes

A — No

B — Yes

A — Yes

Section B: Match the Pairs

"hello" → A string data type that holds text

true → A boolean data type representing true or false

A data type for whole or decimal numbers → 42

A data type with two possible values: true or false → false

let name = Sam; → Wrong - string values need quotes around them

let flag = True; → Wrong - booleans use lowercase true/false

Section C: Definitions

string — A data type that holds text, written inside quotes like "hello".

Section D: Fill in the Blanks

let age = 12;

let isReady = false;

let price = 9.99;

let isDone = true;

let temp = -5;

Section E: Spot the Error

A — String values need quotes around them, like "Sam".

A — Booleans use lowercase true/false, not True.

B — String values need quotes around them, like "Perth".

B — Booleans use lowercase true/false, not False.

C — Booleans must be true or false, not yes.