Understanding Variables in Programming

What is a variable? A) A type of algorithm B) A storage location in a program that can hold data which may change C) A programming error D) A fixed value

• A method for sorting data

• B) A storage location in a program that can hold data which may change

• A constant value in programming

• A type of data structure

Why are variable names important? A) To ensure they are easy to remember B) To make the code look nice C) To indicate what data they store D) All of the above

• To increase execution speed

• D) All of the above

• To confuse the reader

• To limit the scope of variables

What is the process of assigning a value to a variable called? A) Declaration B) Assignment C) Initialization D) Definition

• Data Definition

• Value Declaration

• Variable Assignment

• C) Initialization

Which of the following can a variable store? A) Only numbers B) Only text C) Numbers and text D) None of the above

• Only boolean values

• Only special characters

• Only lists of items

• C) Numbers and text

What is an example of a variable assignment? A) set Count to 5 B) Count equals 5 C) Count: 5 D) Count = 5

• Count := 5

• Count is 5

• D) Count = 5

• Count -> 5

What happens to a variable's value when a new value is assigned? A) It keeps both values B) It loses the old value and stores the new one C) It displays an error D) It cannot be changed

• It randomly changes to a different value

• B) It loses the old value and stores the new one

• It combines both values into a list

• It retains the previous value temporarily

What type of values can variables hold? A) Only text B) Only numbers C) Text, numbers, and symbols D) None of the above

• Only integers

• Only boolean values

• C) Text, numbers, and symbols

• Only special characters

What is the default value of a variable when it is declared but not initialized? A) 0 B) null C) undefined D) It depends on the programming language

• D) random value

• A) -1

• C) undefined

• B) false

Can variable names start with a number? A) Yes B) No C) Only in some languages D) It depends on the context

• D) Yes, in all cases

• A) Sometimes

• B) No

• C) Only in programming

What is a constant? A) A variable that cannot change B) A type of variable C) A programming error D) A fixed value that can change

• A variable that can change

• A) A variable that cannot change

• A mathematical constant

• A placeholder for data