Python Coding Specialist: Quiz Variables and Data Types

What is a variable in Python?

• A type of Python version

• A reserved memory location to store values

• A specific Python library

• A function in Python

Which of the following is a mutable data type in Python?

• String

• Tuple

• List

• Integer

What will be the data type of the variable `x` after the assignment `x = 4.5`?

• int

• float

• str

• list

Which of the following is the correct way to define a variable `a` storing the integer value `100`?

• int a = 100

• a := 100

• var a = 100

• a = 100

What is the output of the following code snippet? ```python a = "Python" print(type(a)) ```

• class 'int'
• int
• class 'str'
• NoneType

Which of the following is NOT a valid variable name in Python?

• _myVar

• myVar_

• 2myVar

• my_Var

How do you convert the string `"123"` into an integer in Python?

• int("123")

• str(123)

• "123".toInt()

• convert("123", int)

What will be the output of the following code? ```python x = 10 y = "20" z = x + int(y) print(z) ```

• 1020

• "1020"

• 30

• "30"

Which of the following data types is used to store a sequence of text characters?

• int

• str

• list

• char

What does the `len()` function return when given a list as an argument?

• The sum of all elements in the list

• The number of elements in the list

• The largest element in the list

• The type of elements in the list