Python Basics Worksheet

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

• 2nd_sem_marks

• total-marks

• student_name

• if

What is the output of the following code?

x = 10

y = 3.14

print(type(x + y))

• class <'int'>

• <class 'float'>

• <class 'complex'>

• Error

Which of these is NOT a mutable data type in Python?

• list

• dictionary

• tuple

• set

What will be the value of a after executing this code?

a = 5

b = a

a = 10

• 5

• 10

• None

• Error

Which of the following creates an empty list?

• list = {}

• list = []

• list = ()

• list = set()

What is the output?

colors = ["red", "green", "blue"]

print(colors[1][-1])

• green

• n

• e

• IndexError

Which method adds a single element at the end of a list?

• append()

• extend()

• insert()

• add()

What is the output of the following?

t = (10, 20, [30, 40])

t[2][0] = 99

print(t)

• Error – tuple is immutable

• (10, 20, [99, 40])

• (10, 20, 99, 40)

• None of these

Which of the following is the correct way to create a tuple with only one element?

• t = (5)

• t = 5,

• t = (5,)

• Both B and C

What will len() return for this variable? data = "ECE-2026"

• A) 7

• B) 8

• C) 9

• D) Error