40+
MCQs Covered
6
Topics Covered
#1
Language 2026
2026
Updated For
Python is the world’s most popular programming language in 2026 — used by data scientists, web developers, AI engineers, automation specialists, and beginners worldwide. It is consistently ranked number one on the TIOBE Index and GitHub’s most-used languages list. Python powers tools like ChatGPT, Instagram, YouTube, Netflix’s recommendation engine, and NASA’s scientific computing systems. Whether you are preparing for a university exam, a technical interview, a certification like PCEP or PCAP, or simply learning to code for the first time — these fully solved MCQs cover every foundational Python concept to help you build confidence and score higher.
🐍 Basics
Syntax & Types
🔁 Control Flow
Loops & If
📦 Data Structures
Lists & Dicts
⚙️ Functions
Def & Lambda
🏗️ OOP
Classes & Objects
📚 Libraries
NumPy & Pandas
Syntax & Types
🔁 Control Flow
Loops & If
📦 Data Structures
Lists & Dicts
⚙️ Functions
Def & Lambda
🏗️ OOP
Classes & Objects
📚 Libraries
NumPy & Pandas
Question 01
What will the following Python code output?print(type(42))
A
<class 'float'>B
<class 'int'> ✅C
<class 'str'>D
<class 'number'>💡 ExplanationIn Python, 42 is a whole number so its type is
int (integer). The four core built-in data types are: int (whole numbers), float (decimal numbers), str (text), and bool (True/False). Python is dynamically typed — you never need to declare a type manually.Question 02
Which symbol is used for comments in Python?
A
//B
/* */C
# ✅D
--💡 ExplanationThe hash symbol
# starts a single-line comment in Python. Everything after # on that line is ignored by the interpreter. For multi-line comments Python uses triple quotes """...""" or '''...''' — though technically these are string literals not true comments.Question 03
What is the output of print(10 // 3) in Python?
A3.33
B3 ✅
C4
D1
💡 ExplanationThe
// operator is floor division — it divides and rounds down to the nearest whole number. 10 ÷ 3 = 3.33, floored to 3. Other operators: / gives float division (3.33), % gives the remainder (1), and ** is exponentiation (10³ = 1000).🔁
Topic 2 — Control Flow
if/elif/else, for loops, while loops, break, continue, and range()
Question 04
How many times will the following loop print “Hello”?for i in range(3): print("Hello")
A2 times
B3 times ✅
C4 times
D0 times
💡 Explanation
range(3) generates the sequence 0, 1, 2 — three values. So the loop runs three times, printing “Hello” each time. range(n) always starts at 0 and goes up to (but not including) n. range(1, 6) would give 1, 2, 3, 4, 5 — five iterations.Question 05
What does the break statement do inside a loop?
ASkips the current iteration and continues with the next one
BImmediately exits the loop entirely — no more iterations run after it ✅
CPauses the loop for a defined number of seconds
DRestarts the loop from the first iteration again
💡 Explanation
break terminates the loop immediately. continue skips the rest of the current iteration and jumps to the next one. For example searching a list and using break once a target is found avoids unnecessary iterations through the remaining elements.📦
Topic 3 — Python Data Structures
Lists, tuples, dictionaries, sets, and their methods
Question 06
What is the key difference between a Python list and a tuple?
ALists are mutable (can be changed after creation) while tuples are immutable (cannot be changed after creation) ✅
BTuples can hold more items than lists in the same amount of memory
CLists use square brackets while tuples use curly braces
DTuples can only store strings while lists can store any data type
💡 ExplanationLists use
[] and can be modified — add, remove, or change elements. Tuples use () and are immutable — perfect for fixed data like coordinates or database records. Tuples are faster and use less memory, making them preferred when data should not change.Question 07
What will my_list = [1,2,3,4,5]; print(my_list[1:3]) output?
A
[1, 2, 3]B
[2, 3] ✅C
[2, 3, 4]D
[1, 2]💡 ExplanationPython slicing
[start:stop] includes the start index but excludes the stop index. Index 1 is the value 2 and index 3 is the value 4 — but 4 is excluded. So [1:3] returns elements at index 1 and 2 which are [2, 3]. Python lists are zero-indexed starting from 0.Question 08
What is a Python dictionary?
AAn ordered collection of unique values with no duplicate elements
BA collection of key-value pairs where each unique key maps to a specific value, allowing fast lookup by key ✅
CAn immutable sequence of items that cannot be changed after creation
DA built-in Python module for translating text between languages
💡 ExplanationDictionaries use
{} and store data as key:value pairs — e.g. {"name": "Ali", "age": 25}. Access values using keys: person["name"] returns “Ali”. Since Python 3.7 dictionaries maintain insertion order. They are one of Python’s most frequently used data structures.⚙️
Topic 4 — Functions in Python
def keyword, parameters, return, lambda functions, and scope
Question 09
What will the following function return?def add(a, b):
return a + b
print(add(3, 4))
A34
B7 ✅
CNone
DError
💡 ExplanationThe function
add(a, b) takes two parameters and returns their sum. Calling add(3, 4) passes 3 for a and 4 for b, so it returns 3 + 4 = 7. Functions defined with def are the foundation of reusable, organized Python code.Question 10
What is a lambda function in Python?
AA function that runs automatically when Python starts
BA small anonymous function defined with the lambda keyword — it can take any number of arguments but can only have one expression ✅
CA function imported from an external Python library
DA built-in function that creates a new list from an existing one
💡 ExplanationLambda functions are compact one-liners:
square = lambda x: x**2 — calling square(5) returns 25. They are commonly used with built-in functions like sorted(), map(), and filter() where a short function is needed temporarily without defining a full def block.🏗️
Topic 5 — Object-Oriented Programming
Classes, objects, __init__, inheritance, and encapsulation
Question 11
What is the purpose of the __init__ method in a Python class?
AIt is called when the class itself is first imported into Python
BIt is the constructor method — automatically called when a new object is created from the class to initialize its attributes ✅
CIt destroys an object and frees its memory when no longer needed
DIt is a special method that returns the string representation of an object
💡 ExplanationEvery time you create an object with
car = Car("Toyota", 2026), Python automatically calls __init__ to set up the object’s initial state. The first parameter self refers to the object being created. It is the most important special method (dunder method) in Python OOP.Question 12
What is inheritance in Python OOP?
ACopying code from one Python file to another to reuse it
BA mechanism where a child class automatically acquires the attributes and methods of a parent class — enabling code reuse and hierarchical relationships ✅
CRestricting access to certain parts of an object using private variables
DConverting one data type into another using built-in Python functions
💡 ExplanationInheritance allows code reuse. A
Dog class can inherit from an Animal class — automatically getting all Animal attributes and methods, while adding its own like bark(). This is defined as class Dog(Animal):. Inheritance is one of the four pillars of OOP alongside encapsulation, polymorphism, and abstraction.📚
Topic 6 — Python Libraries & Modules
NumPy, Pandas, Matplotlib, pip, and importing modules
Question 13
What is NumPy primarily used for in Python?
ABuilding and designing websites using Python as a backend language
BNumerical computing with multi-dimensional arrays and high-performance mathematical operations ✅
CSending HTTP requests to APIs and parsing web pages
DCreating graphical user interfaces for desktop applications
💡 ExplanationNumPy (Numerical Python) is the foundation of Python’s data science ecosystem. It provides the
ndarray object — a fast multi-dimensional array that enables vectorized operations without slow Python loops. NumPy is a dependency for Pandas, Matplotlib, scikit-learn, and TensorFlow.Question 14
What is a Pandas DataFrame?
AA Python dictionary that stores only numeric values
BA two-dimensional labeled data structure — like a table or spreadsheet — with rows and columns that can hold data of mixed types ✅
CA built-in Python class for working with date and time values
DA special type of Python list that only accepts string values
💡 ExplanationA Pandas DataFrame is essentially a spreadsheet in Python. You can load a CSV with
pd.read_csv("data.csv"), filter rows with df[df["age"] > 30], group data with df.groupby("city"), and clean missing values with df.dropna(). Pandas is the most widely used data manipulation library in Python.Question 15
What command is used to install a Python library using pip?
A
python import pandasB
get library pandasC
pip install pandas ✅D
download pandas --python💡 Explanation
pip is Python’s package installer. Run pip install pandas in your terminal to download and install Pandas from PyPI (Python Package Index). After installation, import it in your code with import pandas as pd. There are over 400,000 packages available on PyPI for almost every task imaginable.Question 16
What does the following Python code do?import math; print(math.sqrt(144))
APrints the square of 144 which is 20,736
BPrints the square root of 144 which is 12.0 ✅
CPrints 144 divided by 2 which is 72
DRaises an ImportError because math is not a valid module
💡 ExplanationThe
math module is part of Python’s standard library — no installation needed. math.sqrt(144) returns 12.0 (as a float). Other useful math functions: math.pi (3.14159), math.ceil(3.2) returns 4, math.floor(3.9) returns 3, math.abs(-5) returns 5.🐍 Python Essentials Quick Reference
📝 Data Types
int, float, str, bool, list, tuple, dict, set
🔁 Loops
for, while, break, continue, range()
⚙️ Functions
def, return, lambda, *args, **kwargs
🏗️ OOP
class, __init__, self, inheritance
📚 Key Libraries
NumPy, Pandas, Matplotlib, Requests
🛠️ Tools
pip, Jupyter Notebook, VS Code, PyCharm
💡 Top Tips to Master Python in 2026
💻
Code Every Day
Even 20 minutes daily builds muscle memory faster than weekend sessions
🏗️
Build Projects
Build a calculator, quiz app, or data analyzer — projects beat tutorials
🆓
Use Free Resources
Python.org docs, freeCodeCamp, and Kaggle are all completely free
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