Top 20 Python Code Snippets Frequently Asked in MNC Interviews

 

Cracking MNC interviews requires strong fundamentals and clean coding logic. Below are 20 commonly asked small Python programs that test problem-solving, clarity, and understanding of core concepts.

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1️⃣ Reverse a String

s = "Python"
print(s[::-1])

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2️⃣ Check Palindrome

s = "madam"
print(s == s[::-1])

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3️⃣ Swap Two Numbers (Without Temp)

a, b = 5, 10
a, b = b, a
print(a, b)

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4️⃣ Find Factorial

def factorial(n):
    return 1 if n == 0 else n * factorial(n-1)

print(factorial(5))

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5️⃣ Fibonacci Series

a, b = 0, 1
for _ in range(5):
    print(a, end=" ")
    a, b = b, a+b

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6️⃣ Find Largest Element in List

nums = [4, 7, 1, 9]
print(max(nums))

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7️⃣ Remove Duplicates from List

nums = [1,2,2,3,4,4]
print(list(set(nums)))

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8️⃣ Count Character Frequency

from collections import Counter
print(Counter("python"))

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9️⃣ Check Prime Number

n = 7
print(all(n % i != 0 for i in range(2, n)))

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🔟 Find Second Largest Number

nums = [10, 20, 4, 45]
nums.sort()
print(nums[-2])

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1️⃣1️⃣ Merge Two Dictionaries

d1 = {"a":1}
d2 = {"b":2}
print({**d1, **d2})

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1️⃣2️⃣ Find Missing Number in Range

nums = [1,2,4,5]
n = 5
print(n*(n+1)//2 - sum(nums))

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1️⃣3️⃣ Sort List of Tuples

data = [(1,3),(3,1),(5,2)]
print(sorted(data, key=lambda x: x[1]))

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1️⃣4️⃣ Check Anagram

s1, s2 = "listen", "silent"
print(sorted(s1) == sorted(s2))

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1️⃣5️⃣ Flatten Nested List

nested = [[1,2],[3,4]]
print([item for sub in nested for item in sub])

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1️⃣6️⃣ Find Common Elements

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

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1️⃣7️⃣ Generate Random Number

import random
print(random.randint(1,10))

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1️⃣8️⃣ Check Armstrong Number

n = 153
print(n == sum(int(d)**3 for d in str(n)))

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1️⃣9️⃣ Count Vowels

s = "hello world"
print(sum(1 for c in s if c in "aeiou"))

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2️⃣0️⃣ Find GCD

import math
print(math.gcd(24, 36))

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🎯 Why These Questions Matter

MNC interviews often test:

• Logical thinking

• Understanding of Python fundamentals

• Data structure manipulation

• Code readability

• Optimization awareness

Master these 20 patterns, and you cover 60–70% of entry-to-mid-level Python interview questions.

 

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