Data Types and Variables – Multiple Choice Questions (MCQs)

1. 1. What will be the data type of the variable `result` after the operation `result = 10 / 2`?

   • A. int
   • B. float
   • C. str
   • D. bool

2. 2. Which of the following is an immutable built-in data type in Python?

   • A. list
   • B. dict
   • C. set
   • D. tuple

3. 3. Given `x = '5'` and `y = 3`, what will be the output of `print(x * y)`?

   • A. 53'
   • B. 555'
   • C. 15
   • D. Error

4. 4. Which of the following is a valid way to declare a string in Python?

   • A. hello'
   • B. world
   • C. `python`
   • D. "multi line"

5. 5. What is the output of `print(type({1, 'a'}))`?

   • A. <class 'set'>
   • B. <class 'frozenset'>
   • C. <class 'list'>
   • D. <class 'tuple'>

6. 6. Which of the following operations will result in a TypeError in Python?

   • A. `'a' + 1`
   • B. `'a' * 3`
   • C. `'a' == 'a'`
   • D. len('a')

7. 7. What is the correct way to convert the string `'123'` to an integer in Python?

   • A. int('123')
   • B. float('123')
   • C. str(123)
   • D. chr(123)

8. 8. What will be the value of `x` after the execution of `x = 5; x += '3'`?

   • A. 8
   • B. 53'
   • C. TypeError
   • D. None

9. 9. Which of the following is a valid way to create an empty dictionary in Python?

   • A. {}
   • B. dict()
   • C. []
   • D. ()

10. 10. What will be the output of `print(bool(0), bool(1), bool(''))`?

    • A. False True False
    • B. True True True
    • C. False False False
    • D. True False True

11. 11. Which of the following is NOT a valid boolean value in Python?

    • A. TRUE
    • B. FALSE
    • C. 1
    • D. 0

12. 12. What is the term used for converting a value of one data type to another?

    • A. Casting
    • B. Type hinting
    • C. Declaration
    • D. Assignment