variable in python

Which of the following is a valid variable name in Python?

• 1variable

• variable_1

• variable-1

• variable 1

What is the type of the variable x after executing x = 5.5?

• int

• str

• float

• bool

Which keyword is used to define a variable in Python?

• var

• let

• const

• No keyword is used

What will be the output of the following code?

x = "Hello"

y = "World"

print(x + y)

• Hello World

• HelloWorld

• Hello World!

• HelloWorld!HelloWorld!

Which of the following statements is true about variables in Python?

• Variables in Python must be declared before use.

• Variables in Python are dynamically typed.

• Variable names in Python can start with a number.

• Variables cannot be reassigned after they are created.

What does the following code do?

x = 10

x = "ten"

• Throws a type error

• Changes the value of x to "ten"

• Raises a syntax error

• Changes the value of x to 10

What is the output of the following code?

x = 10

print(x + "5")

• 105

• 15

• Error

• x5

How can you swap the values of two variables a and b in Python?

• a, b = b, a

• a = b; b = a

• temp = a; a = b; b = temp

• swap(a, b)

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

• int

• str

• tuple

• list

What will be the type of x after the following code?

x = 5 + 3j

• int

• float

• complex

• str