What is a variable in programming?

• A keyword in C++

• A fixed value that cannot change

• A container to hold data

• A type of data structure

Which of the following is a valid variable name?

• first name

• first_name

• first-name

• 1stVariable

What does the 'const' keyword do in C++?

• Declares a constant whose value cannot change

• Declares a data type

• Declares a variable that can change

• Declares a function

Which of the following is NOT a type of literal in C++?

• Dynamic literal

• Integer literal

• Floating-point literal

• String literal

What is the size of an 'int' data type in C++?

• 1 byte

• 4 bytes

• 2 bytes

• 8 bytes

Which of the following is a valid escape sequence in C++?

• 'n'

• \n

• 't'

• \t

What is the range of values that an 'int' can store in C++?

• 0 to 255

• -2147483648 to 2147483647

• -32768 to 32767

• -128 to 127

Which data type is used for characters in C++?

• char

• float

• string

• int

What is the purpose of comments in C++?

• To execute code

• To make code easier to read

• To define variables

• To declare functions

Which of the following is a floating-point data type?

• bool

• float

• char

• int