10 Important Coding Interview Question for Python with Answers and Explanations

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10 IMPORTANT CODING INTERVIEW QUESTION FOR PYTHON WITH ANSWERS

-Anupam Shrivastava




Here are 10 important coding interview questions for Python along with sample answers and explanations:


1. Write a program to check if a given number is prime.

Answer:


Explanation:

This program checks if a given number is prime by iterating through all numbers from 2 to the number itself, checking if any of them are factors of the number. If there are no factors, the number is prime.

2. Write a program to reverse a string.

Answer:


Explanation:

This program uses slicing to reverse a given string. The [::-1] syntax tells Python to start at the end of the string and move backwards by 1 character at a time until it reaches the beginning.

3. Write a program to find the maximum and minimum numbers in a list.

Answer:


Explanation:

This program iterates through a given list of numbers, keeping track of the maximum and minimum numbers it has seen so far. At the end, it returns a tuple containing both the maximum and minimum numbers.

4. Write a program to sort a list of numbers.

Answer:


Explanation:

This program uses the built-in sorted() function to sort a given list of numbers in ascending order. Alternatively, the sort() method can be used to sort the list in place.

5. Write a program to check if two strings are anagrams.

Answer:


Explanation:

This program checks if two given strings are anagrams by sorting both strings and comparing them. If they are anagrams, the sorted versions of the strings should be the same.

6. Write a program to find the factorial of a given number.

Answer:


Explanation:

This program finds the factorial of a given number using recursion. If the number is 0, the function returns 1 (since 0! = 1). Otherwise, it multiplies the number by the factorial of (num - 1) until it reaches 0.

7. Write a program to count the number of vowels in a string.

Answer:


Explanation:

This program counts the number of vowels in a given string by iterating through each character and checking if it is a vowel. If it is, the counter is incremented.

8. Write a program to find the first non-repeating character in a string.

Answer:


Explanation:

This program finds the first non-repeating character in a given string by using a dictionary to keep track of the count of each character. It then iterates through the string again and returns the first character with a count of 1.

9. Write a program to implement a binary search algorithm.

Answer:


Explanation:

This program implements a binary search algorithm to search for a target value in a sorted array. It first initializes the low and high indices to the beginning and end of the array, respectively. It then repeatedly calculates the midpoint of the array and checks if the target value is less than, greater than, or equal to the value at the midpoint. It then adjusts the low and high indices accordingly and repeats the process until it finds the target value or determines that it is not in the array.

10. Write a program to find the largest sum of contiguous subarray in a given array.

Answer:


Explanation:

This program finds the largest sum of contiguous subarray in a given array using the Kadane's algorithm. It iterates through the array, keeping track of the maximum sum seen so far and the current sum of the subarray ending at the current index. At each index, it updates the current sum to be the maximum of the current element or the current sum plus the current element (i.e., whether to start a new subarray or continue the existing one). It also updates the maximum sum seen so far to be the maximum of the current sum and the previous maximum.


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