Python MCQs Data Types - Digital Study Lab

Q1. Which of the following is a built-in data type in Python?

A) real
B) float
C) double
D) character

✅ Correct Answer: (B) float
📘 Explanation: float is a built-in Python data type used to store decimal values.

Q2. Which data type is used to store whole numbers in Python?

A) float
B) int
C) complex
D) bool

✅ Correct Answer: (B) int
📘 Explanation: The int data type stores integer (whole number) values.

Q3. Which of the following is an immutable data type?

A) list
B) set
C) dictionary
D) tuple

✅ Correct Answer: (D) tuple
📘 Explanation: Tuples cannot be changed after creation, so they are immutable.

Q4. What will be the data type of the value 10.5?

A) int
B) float
C) complex
D) bool

✅ Correct Answer: (B) float
📘 Explanation: Decimal numbers are stored as float in Python.

Q5. Which function is used to check the data type of a variable?

A) datatype()
B) typeof()
C) type()
D) check()

✅ Correct Answer: (B) type()
📘 Explanation: The type() function returns the data type of a variable.

Q6. Which data type is used to store True or False values?

A) int
B) bool
C) str
D) float

✅ Correct Answer: (B) bool
📘 Explanation: The bool data type stores Boolean values: True or False.

Q7. Which of the following is a mutable data type?

A) tuple
B) string
C) list
D) int

✅ Correct Answer: (C) list
📘 Explanation: Lists can be modified after creation, making them mutable.

Q8. What is the data type of 5 + 3j in Python?

A) int
B) float
C) complex
D) bool

✅ Correct Answer: (C) complex
📘 Explanation: Numbers with real and imaginary parts are of complex data type.

Q9. Which data type is used to store text in Python?

A) char
B) string
C) str
D) text

✅ Correct Answer: (C) str
📘 Explanation: Python uses the str data type to store text..

Q10. Which of the following represents a dictionary in Python?

A) (1, 2, 3)
B) [1, 2, 3]
C) {1, 2, 3}
D) {“a”: 1, “b”: 2}

✅ Correct Answer: (D) {“a”: 1, “b”: 2}
📘 Explanation: Dictionaries store data in key–value pairs using {}.

Q11. Which function converts a value to an integer?

A) int()
B) float()
C) str()
D) bool()

✅ Correct Answer: (A) int()
📘 Explanation: The int() function converts compatible values to integers.

Q12. Which data type stores unique values only?

A) list
B) tuple
C) set
D) dictionary

✅ Correct Answer: (C) set
📘 Explanation: A set automatically removes duplicate values.

Q13. What will be the output of the following code?

type([1, 2, 3])

A) list
B) class ‘list’
C) tuple
D) dict

✅ Correct Answer: (B) class ‘list’
📘 Explanation: The type() function returns the class of the object.

Q14. Which of the following is an ordered data type?

A) set
B) dictionary
C) list
D) none

✅ Correct Answer: (C) list
📘 Explanation: Lists maintain the order of elements.

Q15. Which data type is used to store key–value pairs?

A) list
B) tuple
C) set
D) dictionary

✅ Correct Answer: (D) dictionary
📘 Explanation: Dictionaries store data as key–value pairs.

Q16. Which of the following is NOT a Python data type?

A) int
B) float
C) char
D) str

✅ Correct Answer: (C) char
📘 Explanation: Python does not have a char data type; characters are stored as strings.

Q17. What is the output of the following code?

type(True)

A) bool
B) int
C) str
D) float

✅ Correct Answer: (A) bool
📘 Explanation: True is a Boolean value of type bool.

Q18. Which data type can store multiple different data types?

A) int
B) list
C) float
D) bool

✅ Correct Answer: (B) list
📘 Explanation: Lists can store elements of different data types.

Q19. Which function converts data to string type?