C++ Identifiers and Constants Quiz

Which of the following is a valid identifier in C++?

• 100students

• Vari@bles

• my_school

• Playing Football

What is the maximum number of characters allowed in an identifier in most programming languages?

• 31

• 15

• 50

• 100

Which of the following is NOT allowed in an identifier name?

• Letters

• Numbers

• Underscore (_)

• Spaces

In C++, what happens when you use an identifier that matches a reserved word?

• The program will run as normal

• The compiler will treat it as a special variable

• It will cause a syntax error

• It will be ignored

What is the correct syntax for declaring a constant in C++?

• const datatype variable_name;

• datatype const variable_name = value;

• datatype variable_name;

• #define variable_name value

Which of the following is an example of a reserved word in C++?

• myVariable

• int

• my_school

• student

Which of the following data types can be used to declare a variable in C++?

• char

• int

• float

• All of the above

What is the difference between a variable and a constant in C++?

• A variable's value can change, but a constant's value cannot

• A constant can store only numbers, while a variable can store any data type

• A variable is declared using #define, while a constant is declared using const

• There is no difference

Which of the following is the correct way to initialize a variable at the time of declaration?

• int number;

• float salary = 5000.00;

• char name;

• const int age;

What is an identifier in C++?

• A name provided to a variable or other C++ element

• A reserved word in C++

• A data type that stores characters

• A value that remains unchanged