90+ Coding Questions to Ace Python Interviews in 2024

Are you preparing for your next Python interview? Coding questions are an essential part of any technical interview, and Python coding questions are no exception. As a popular programming language for data science, machine learning, and web development, Python coding skills are in high demand.

In this comprehensive article, we’ll explore 90+ Python coding questions that are commonly asked in interviews. We’ve categorized these questions into different sections to help you focus on specific areas and better prepare for your upcoming interview.

Python Coding Questions on Numbers

1. Reverse an Integer
   Write a program to reverse an integer in Python.

2. Armstrong Number
   Write a program in Python to check whether an integer is an Armstrong number or not.

3. Prime Number
   Write a program in Python to check if a given number is prime or not.

4. Fibonacci Series (Iterative)
   Write a program in Python to print the Fibonacci series using the iterative method.

5. Fibonacci Series (Recursive)
   Write a program in Python to print the Fibonacci series using the recursive method.

6. Palindrome Number (Iterative)
   Write a program in Python to check whether a number is a palindrome or not using the iterative method.

7. Palindrome Number (Recursive)
   Write a program in Python to check whether a number is a palindrome or not using the recursive method.

8. Greatest Among Three Integers
   Write a program in Python to find the greatest among three integers.

9. Check if a Number is Binary
   Write a program in Python to check if a number is binary.

10. Sum of Digits Using Recursion
    Write a program in Python to find the sum of digits of a number using recursion.

11. Swap Two Numbers Without a Third Variable
    Write a program in Python to swap two numbers without using a third variable.

12. Swap Two Numbers Using a Third Variable
    Write a program in Python to swap two numbers using a third variable.

13. Prime Factors
    Write a program in Python to find the prime factors of a given integer.

14. Add Two Integers Without Arithmetic Operators
    Write a program in Python to add two integers without using arithmetic operators.

15. Check if a Number is Perfect
    Write a program in Python to find if a given number is perfect or not.

16. Average of Numbers
    Python Program to find the average of numbers with explanations.

17. Factorial Using Iterative Method
    Python Program to calculate the factorial using the iterative method.

18. Factorial Using Recursion
    Python Program to calculate the factorial using recursion.

19. Check if a Number is Even or Odd
    Python Program to check if a given number is even or odd.

20. Print First n Prime Numbers
    Python program to print the first n prime numbers with an explanation.

21. Print Prime Numbers in a Given Range
    Python Program to print prime numbers in a given range.

22. Smallest Number Among Three
    Python Program to find the smallest number among three.

23. Calculate Power Using the POW Method
    Python program to calculate the power using the POW method.

24. Calculate Power Without Using the POW Function (For Loop)
    Python Program to calculate the power without using the POW function (using a for loop).

25. Calculate Power Without Using the POW Function (While Loop)
    Python Program to calculate the power without using the POW function (using a while loop).

26. Calculate Square of a Number
    Python Program to calculate the square of a given number.

27. Calculate Cube of a Number
    Python Program to calculate the cube of a given number.

28. Calculate Square Root of a Number
    Python Program to calculate the square root of a given number.

29. Calculate LCM of Two Numbers
    Python program to calculate the LCM (Least Common Multiple) of two given numbers.

30. Find GCD or HCF of Two Numbers
    Python Program to find the GCD (Greatest Common Divisor) or HCF (Highest Common Factor) of two numbers.

31. Find GCD Using Recursion
    Python Program to find the GCD of two numbers using recursion.

32. Convert Decimal to Binary
    Python Program to convert a decimal number into its binary representation.

33. Convert Decimal to Octal
    Python Program to convert a decimal number to its octal representation.

34. Check if a Year is Leap Year
    Python Program to check if the given year is a leap year or not.

35. Convert Celsius to Fahrenheit
    Python Program to convert a temperature value from Celsius to Fahrenheit.

36. Convert Fahrenheit to Celsius
    Python Program to convert a temperature value from Fahrenheit to Celsius.

37. Calculate Simple Interest
    Python program to calculate the simple interest with an explanation.

Python Coding Questions on Strings

1. Remove a Character from a String
   Python program to remove a given character from a string.

2. Count Occurrence of a Character
   Python Program to count the occurrence of a given character in a string.

3. Check if Two Strings are Anagrams
   Python Program to check if two strings are anagrams.

4. Check if a String is Palindrome
   Python program to check if a given string is a palindrome or not.

5. Check if a Character is a Vowel or Consonant
   Python program to check if a given character is a vowel or a consonant.

6. Check if a Character is a Digit
   Python program to check if a given character is a digit or not.

7. Check if a Character is a Digit Using isdigit()
   Python program to check if a given character is a digit or not using the isdigit() method.

8. Replace String Spaces with a Character
   Python program to replace the spaces in a string with a given character.

9. Replace String Spaces with a Character Using replace()
   Python program to replace the spaces in a string with a given character using the replace() method.

10. Convert Lowercase to Uppercase
    Python program to convert lowercase characters to uppercase in a string.

11. Convert Lowercase Vowels to Uppercase
    Python program to convert lowercase vowels to uppercase in a string.

12. Delete Vowels from a String
    Python program to delete vowels from a given string.

13. Count Occurrence of Vowels and Consonants
    Python program to count the occurrence of vowels and consonants in a string.

14. Print Highest Frequency Character
    Python program to print the highest frequency character in a string.

15. Replace First Occurrence of a Vowel with ‘-‘
    Python program to replace the first occurrence of a vowel with ‘-‘ in a string.

16. Count Alphabets, Digits, and Special Characters
    Python program to count the alphabets, digits, and special characters in a given string.

17. Separate Characters in a String
    Python program to separate characters in a given string.

18. Remove Blank Spaces from a String
    Python program to remove blank spaces from a string.

19. Concatenate Strings Using join()
    Python program to concatenate two strings using the join() method.

20. Concatenate Strings Without Using join()
    Python program to concatenate two strings without using the join() method.

21. Remove Repeated Characters from a String
    Python program to remove repeated characters from a string.

22. Calculate Sum of Integers in a String
    Python program to calculate the sum of integers in a string.

23. Print All Non-Repeating Characters
    Python program to print all non-repeating characters in a string.

24. Copy One String to Another
    Python program to copy one string to another string.

25. Sort Characters in Ascending Order
    Python Program to sort characters of a string in ascending order.

26. Sort Characters in Descending Order
    Python Program to sort characters of a string in descending order.

Python Coding Questions on Arrays

1. Find the Missing Number in an Array (1-100)
   Write a program in Python for: In an array of 1-100 numbers, one number is missing; how do you find it?

2. Find Duplicate Numbers in an Array (1-100)
   Write a program in Python for: In an array of 1-100 numbers, multiple numbers are duplicates; how do you find them?

3. Find Pairs with a Given Sum
   Write a program in Python for: How to find all pairs in an array of integers whose sum is equal to a given number.

4. Compare Two Arrays for Equal Size
   Write a program in Python for: How to compare if two arrays are equal in size or not.

5. Find Largest and Smallest Numbers in an Array
   Write a program in Python to find the largest and smallest numbers in an array.

6. Find Second Highest Number in an Array
   Write a program in Python to find the second-highest number in an integer array.

7. Find Top Two Maximum Numbers in an Array
   Write a program in Python to find the top two maximum numbers in an array.

8. Remove Duplicate Elements from an Array
   Write a program in Python to remove duplicate elements from an array.

9. Print Array in Reverse Order
   Python program to print an array in reverse order.

10. Reverse an Array (Two Ways)
    Python program to reverse an array in two ways.

11. Calculate Length of an Array
    Python Program to calculate the length of an array.

12. Insert an Element at the End of an Array
    Python program to insert an element at the end of an array.

13. Insert an Element at a Given Location in an Array
    Python program to insert an element at a given location in an array.

14. Delete an Element from the End of an Array
    Python Program to delete an element from the end of an array.

15. Delete a Given Element from an Array
    Python Program to delete a given element from an array.

16. Delete an Element from an Array at a Given Index
    Python Program to delete an element from an array at a given index.

17. Find the Sum of Array Elements
    Python Program to find the sum of array elements.

18. Print All Even Numbers in an Array
    Python Program to print all even numbers in an array.

19. Print All Odd Numbers in an Array
    Python Program to print all odd numbers in an array.

20. Perform Left Rotation of Array Elements
    Python program to perform a left rotation of array elements by two positions.

21. Perform Right Rotation of Array Elements
    Python program to perform a right rotation of array elements by two positions.

22. Merge Two Arrays
    Python Program to merge two arrays.

23. Find Highest Frequency Element in an Array
    Python Program to find the highest frequency element in an array.

24. Add Two Numbers Using Recursion
    Python Program to add two numbers using recursion.

Python Linked List Coding Interview Questions

1. Create and Traverse a Singly Linked List
   Python Program to create and traverse a singly linked list.

2. Insert a Node in a Linked List
   Python program to insert a node in a linked list.

3. Reverse a Singly Linked List
   Write a program in Python to reverse a singly linked list.

4. Search an Element in a Singly Linked List
   Python Program to search for an element in a singly linked list.

5. Linked List Deletion
   Linked list deletion in Python: At the beginning, end, and a given location.

6. Find the Third Element from the Last in a Linked List
   Write a program in Python to find the third element from the last in a singly linked list in a single pass.

7. Find the Middle Element of a Linked List
   Write a program in Python to find the middle element of a linked list in a single pass.

These Python coding questions cover a wide range of topics, from basic number operations and string manipulation to advanced data structures like arrays and linked lists. By practicing these questions, you’ll not only improve your Python coding skills but also enhance your problem-solving abilities, which are crucial for any programming interview.

Remember, coding interviews are not just about writing correct code; they also assess your thought process, problem-solving approach, and ability to communicate your ideas effectively. Practice these questions diligently, and you’ll be well-prepared to ace your next Python coding interview.

Good luck!