Data types and variables

Question 1

What is a variable in programming?

Answer 1

A variable is a storage location identified by a name that can hold a value which may change during the execution of a program.

Question 2

True or False: A variable can only store one data type at a time.

Answer 2

True

Question 3

What are the four main data types in programming?

Answer 3

Integer, Float, String, Boolean

Question 4

Fill in the blank: An _____ is a type of variable that can only hold two values: true or false.

Answer 4

Boolean

Question 5

What data type would you use to store a person’s name?

Answer 5

String

Question 6

Which data type is used for decimal numbers?

Answer 6

Float

Question 7

What is the purpose of a constant in programming?

Answer 7

A constant is a value that cannot be changed during the execution of a program.

Question 8

True or False: Strings can be concatenated in programming.

Answer 8

True

Question 9

What is the result of ‘5’ + 3 in a programming language that uses type coercion?

Answer 9

‘53’

Question 10

What is type casting?

Answer 10

Type casting is the conversion of a variable from one data type to another.

Question 11

Multiple Choice: Which of the following is NOT a data type? A) Integer B) Array C) Function D) Variable

Answer 11

D) Variable

Question 12

Fill in the blank: The _____ operator is used to assign a value to a variable.

Answer 12

assignment

Question 13

What is an array?

Answer 13

An array is a collection of variables that can hold multiple values of the same data type.

Question 14

True or False: A variable name can start with a number.

Answer 14

False

Question 15

What does ‘immutable’ mean in the context of data types?

Answer 15

Immutable means that the value of a data type cannot be changed after it is created.