4. Python Variables Quiz

1. What is the correct way to assign an integer value 10 to a variable named my_number in Python?

int my_number = 10 my_number = 10 my_number := 10 10 = my_number

Answer: my_number = 10

2. Is Python case-sensitive when it comes to variable names?

Yes No It depends on the operating system. Only for variables inside functions.

Answer: Yes

3. What happens if you try to use a variable that has not been assigned a value?

The program will run but produce an incorrect result. Python will automatically assign it a default value. Python will raise a NameError. The program will compile with a warning but run.

Answer: Python will raise a NameError.

4. Which of the following is an invalid variable name?

my_var_1 _my_var 1st_var myVar

Answer: 1st_var

5. Which of the following statements about Python variable names is true?

Variable names can contain hyphens (-). Variable names can start with a number. Variable names can be of any length. Variable names must be declared with a data type

Answer: Variable names can be of any length.

6. By convention, how do programmers indicate that a variable should be treated as a constant?

By using the const keyword. By writing the variable name entirely in uppercase. By adding a comment /* constant */ next to it. There is no convention for this in Python.

Answer: By writing the variable name entirely in uppercase.

7. Consider the following code. What will be the output?
x = 5
x = "Hello"
print(x)

5 Hello None An error will occur.

Answer: Hello

8. What is the output of the following code?
x = 10
y = x
x = 20
print(y)

10 20 10 20 20 10

Answer: 10

9. What is the purpose of "del" statement in Python?

to assign a new value to a variable to declare a variable to delete a variable to print a variable

Answer: to delete a variable

10. What is a variable in Python?

A reserved keyword A container to store values A function A module

Answer: A container to store values

Score: 0 / 0 answered