Python Practice questions

1. Reverse a String

text = "hello" reversed_text = text[::-1] print(reversed_text) # Output: olleh

2. Check if a Number is Prime

def is_prime(n): if n <= 1: return False for i in range(2, int(n**0.5)+1): if n % i == 0: return False return True print(is_prime(13)) # Output: True

3. Find the Factorial of a Number

def factorial(n): result = 1 for i in range(1, n+1): result *= i return result print(factorial(5)) # Output: 120

4. Check for a Palindrome

def is_palindrome(text): return text == text[::-1] print(is_palindrome("madam")) # Output: True

5. Find the Largest Element in a List

numbers = [3, 5, 1, 8, 2] print(max(numbers)) # Output: 8

6. Count Vowels in a String

def count_vowels(s): return sum(1 for char in s.lower() if char in "aeiou") print(count_vowels("Python")) # Output: 1

7. Sum of Elements in a List

nums = [10, 20, 30] print(sum(nums)) # Output: 60

8. Fibonacci Series up to n Terms

def fibonacci(n): a, b = 0, 1 for _ in range(n): print(a, end=" ") a, b = b, a + b fibonacci(5) # Output: 0 1 1 2 3

9. Remove Duplicates from a List

my_list = [1, 2, 2, 3, 4, 4] unique = list(set(my_list)) print(unique) # Output: [1, 2, 3, 4]

10. Check if a Year is Leap Year

def is_leap(year): return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0) print(is_leap(2024)) # Output: True

11. Find the Second Largest Number in a List

def second_largest(numbers): unique = list(set(numbers)) unique.sort() return unique[-2] print(second_largest([5, 1, 8, 2, 8])) # Output: 5

12. Check if Two Strings are Anagrams

def are_anagrams(s1, s2): return sorted(s1) == sorted(s2) print(are_anagrams("listen", "silent")) # Output: True

13. Find GCD of Two Numbers

import math print(math.gcd(36, 60)) # Output: 12

14. Count Frequency of Each Character in a String

from collections import Counter s = "programming" print(Counter(s)) # Output: {'r': 2, 'o': 1, 'g': 2, ...}

15. Find All Even Numbers in a List

numbers = [1, 4, 7, 10, 13] evens = [n for n in numbers if n % 2 == 0] print(evens) # Output: [4, 10]

16. Remove Punctuation from a String

import string s = "Hello, World!" cleaned = ''.join(c for c in s if c not in string.punctuation) print(cleaned) # Output: Hello World

17. Merge Two Dictionaries

a = {'x': 1, 'y': 2} b = {'y': 3, 'z': 4} merged = {**a, **b} print(merged) # Output: {'x': 1, 'y': 3, 'z': 4}

18. Find the Length of the Longest Word

words = ["apple", "banana", "grapefruit"] longest = max(words, key=len) print(longest) # Output: grapefruit

19. Get the Sum of Digits in a Number

n = 1234 total = sum(int(digit) for digit in str(n)) print(total) # Output: 10

20. Check if a List is Sorted

def is_sorted(lst): return lst == sorted(lst) print(is_sorted([1, 2, 3])) # Output: True print(is_sorted([3, 2, 1])) # Output: False

21. Count Words in a Sentence

sentence = "Python is fun and powerful" word_count = len(sentence.split()) print(word_count) # Output: 5

22. Check if a Number is Armstrong

def is_armstrong(n): return n == sum(int(d)**3 for d in str(n)) print(is_armstrong(153)) # Output: True

23. Find All the Divisors of a Number

def divisors(n): return [i for i in range(1, n+1) if n % i == 0] print(divisors(12)) # Output: [1, 2, 3, 4, 6, 12]

24. Count Occurrences of a Word in a Sentence

text = "Python is easy. Python is powerful." count = text.lower().count("python") print(count) # Output: 2

25. Remove Duplicates Without Using Set

lst = [1, 2, 2, 3, 3, 4] unique = [] for i in lst: if i not in unique: unique.append(i) print(unique) # Output: [1, 2, 3, 4]

26. Flatten a 2D List

matrix = [[1, 2], [3, 4], [5]] flattened = [item for row in matrix for item in row] print(flattened) # Output: [1, 2, 3, 4, 5]

27. Swap Two Variables Without a Temp

a, b = 10, 20 a, b = b, a print(a, b) # Output: 20 10

28. Convert Celsius to Fahrenheit

def c_to_f(c): return (c * 9/5) + 32 print(c_to_f(0)) # Output: 32.0

29. Get All Unique Elements from List

lst = [1, 2, 2, 3, 4, 4] unique = list(set(lst)) print(unique) # Output: [1, 2, 3, 4]

30. Find the Most Frequent Element

from collections import Counter lst = [1, 2, 2, 3, 3, 3, 4] most_common = Counter(lst).most_common(1)[0][0] print(most_common) # Output: 3

31. Calculate Factorial Using Recursion

def factorial(n): return 1 if n == 0 else n * factorial(n - 1) print(factorial(5)) # Output: 120

32. Print Fibonacci Series

def fibonacci(n): a, b = 0, 1 for _ in range(n): print(a, end=" ") a, b = b, a + b fibonacci(7) # Output: 0 1 1 2 3 5 8

33. Reverse a List

lst = [1, 2, 3, 4] print(lst[::-1]) # Output: [4, 3, 2, 1]

34. Check if a Number is Prime

def is_prime(n): if n <= 1: return False for i in range(2, int(n**0.5)+1): if n % i == 0: return False return True print(is_prime(7)) # Output: True

35. Find Largest Word in a Sentence

sentence = "Python is an awesome language" words = sentence.split() largest = max(words, key=len) print(largest) # Output: language

36. Remove Vowels from a String

s = "Hello World" result = ''.join(c for c in s if c.lower() not in 'aeiou') print(result) # Output: Hll Wrld

37. Sort a List of Tuples by Second Element

pairs = [(1, 3), (2, 2), (4, 1)] sorted_pairs = sorted(pairs, key=lambda x: x[1]) print(sorted_pairs) # Output: [(4, 1), (2, 2), (1, 3)]

38. Capitalize First Letter of Each Word

text = "hello world" print(text.title()) # Output: Hello World

39. Convert a List to a Dictionary

keys = ['a', 'b', 'c'] values = [1, 2, 3] result = dict(zip(keys, values)) print(result) # Output: {'a': 1, 'b': 2, 'c': 3}

40. Check if a Substring Exists

s = "python programming" print("gram" in s) # Output: True

41. Find ASCII Value of a Character

print(ord('A')) # Output: 65

42. Convert String to List of Characters

s = "hello" print(list(s)) # Output: ['h', 'e', 'l', 'l', 'o']

43. Get Common Elements in Two Lists

a = [1, 2, 3] b = [2, 3, 4] common = list(set(a) & set(b)) print(common) # Output: [2, 3]

44. Count Uppercase Letters

s = "Hello World" count = sum(1 for c in s if c.isupper()) print(count) # Output: 2

45. Replace Spaces with Hyphens

s = "Python is fun" print(s.replace(" ", "-")) # Output: Python-is-fun

46. Get Last Digit of a Number

n = 12345 print(n % 10) # Output: 5

47. Get All Indexes of a Value in List

lst = [1, 2, 3, 2, 4] indexes = [i for i, val in enumerate(lst) if val == 2] print(indexes) # Output: [1, 3]

48. Check Palindrome Using Loop

def is_palindrome(s): for i in range(len(s)//2): if s[i] != s[-(i+1)]: return False return True print(is_palindrome("madam")) # Output: True

49. Sum of List Elements Using Loop

lst = [1, 2, 3, 4] total = 0 for num in lst: total += num print(total) # Output: 10

50. Check if Year is Leap Year

def is_leap(year): return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0) print(is_leap(2024)) # Output: True

Python Practice questions

Top 50 Python Practice Questions with Solutions

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