Data Types and Variables Quiz - CBSE Class 10 Computer Science

Free practice quiz: Data Types and Variables (CBSE Class 10 Computer Science). 37 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 10 Computer Science practice quiz has 37 multiple-choice questions on Data Types and Variables, and 37 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is a variable in Python?

   1. A place to store a value
   2. A data type
   3. A function
   4. An error
   Show answer

   Answer: A. A place to store a value

   A variable is used to store data or values in a program. In Python, a variable can hold different data types.

2. Which keyword is used to define a variable in Python?

   1. var
   2. let
   3. def
   4. None
   Show answer

   Answer: D. None

   Python does not use a specific keyword to define a variable. A variable is created by assigning a value to it.

3. What will be the output of: bool([])?

   1. True
   2. False
   3. Error
   4. None
   Show answer

   Answer: B. False

   In Python, empty collections (like empty lists) evaluate to False when converted to a boolean.

4. Which of the following statements is true about string data type in Python?

   1. Strings are mutable.
   2. Strings can store numerical values only.
   3. Strings are immutable.
   4. Strings can only use single quotes.
   Show answer

   Answer: C. Strings are immutable.

   In Python, strings are immutable, meaning that once created, their content cannot be changed.

5. How are negative indexes used in Python lists?

   1. To access elements in reverse order
   2. To throw an error
   3. To declare null values
   4. To replace elements
   Show answer

   Answer: A. To access elements in reverse order

   Negative indexes in Python lists start counting from the end of the list, allowing reverse accessing of elements.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which of the following is a valid variable name in Python?
2. What data type is the number 42 in Python?
3. What is the result of '5' + '3' in Python?
4. Which of the following is a mutable data type in Python?
5. How do you denote string literals in Python?
6. What is the output of the following code snippet: print(type(5.0))?
7. What does the following code snippet do: x = 5?
8. In Python, what is the difference between '==' and '='?
9. How do you create a single-line comment in Python?
10. What is the output of 'len('Python')'?
11. Which of the following statements about Python variables is true?
12. What is a dictionary in Python?
13. Which of the following can be considered as an immutable sequence in Python?
14. What data type does the function 'input()' return?
15. What happens when a variable is assigned an undefined value in Python?
16. What will be the result of attempting to change a character in a string?
17. Which of the following is NOT a standard data type in Python?
18. What is the keyword for defining a constant in Python?
19. What will be the output of: print('10' + 10)?
20. Why would you use a tuple instead of a list in Python?
21. What is the best way to format a string in Python?
22. How does Python handle variable scopes?
23. What is the use of the 'id()' function in Python?
24. How do you change an element in a list?
25. In Python, what does the following code return: '5' * 3?
26. What will be the result of: int('123.45')?
27. What built-in function can be used to see all properties and methods of an object?
28. What is slicing in Python?
29. What will be the output of: print(bool('Python'))?
30. What is the difference between 'is' and '==' in Python?
31. What will be the result of: complex(1, 2) + complex(3, 4)?
32. Why might you need 'None' in Python?

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