100+ Python Interview Questions to Nail Your Next Interview

What is Python?

Python is an interpreted, high-level programming language characterized by its readability and simplicity. Its design philosophy emphasizes code readability, allowing programmers to express concepts in fewer lines of code than might be used in other languages. With its dynamic typing and dynamic binding, Python supports multiple programming paradigms, including procedural, object-oriented, and functional programming.

What are Python’s key features?

Python boasts numerous key features that contribute to its popularity, including:

• Readability: The syntax is clear and intuitive, which enhances maintainability.
• Interpreted Language: Python code is executed line by line, facilitating debugging and interactive programming.
• Dynamically Typed: Variable types are determined at runtime, allowing for flexibility in coding.
• Extensive Libraries: A vast collection of libraries and frameworks, such as NumPy, Pandas, and Flask, empowers developers to tackle diverse tasks effortlessly.
• Cross-Platform: Python runs seamlessly across different operating systems, making it a versatile choice for developers.

How do you install Python?

Installing Python is a straightforward process. Download the latest version from the official Python website, select the appropriate installer for your operating system, and follow the installation instructions. For most systems, adding Python to the PATH is an essential step to ensure that it can be executed from the command line.

What are Python comments?

Comments in Python are annotations within the code that are not executed. They serve to explain or clarify the purpose of certain code sections, enhancing readability for others (or for the future self). Comments are created using the # symbol for single-line comments and triple quotes (”’ or “””) for multi-line comments.

100+ Python Interview Questions

Basic Level Coding Questions

n = int(input("Enter an integer: "))
if n % 2 != 0:
    print("Weird")
elif 2 <= n <= 5:
    print("Not Weird")
elif 6 <= n <= 20:
    print("Weird")
else:
    print("Not Weird")

2. Print Function problem in Python.

The included code stub will read an integer, n, from STDIN. Without using any string methods, try to print the following: 123……..n

Note that “…” represents the consecutive values in between.

n = int(input())  # Read an integer from the user
for i in range(1, n + 1):
    print(i, end='')  # Print numbers from 1 to n

3. Find the Runner-up Score in Python.
Given the participants’ score sheet for your University Sports Day, you must find the
runner-up score. You are given n scores. Store them in a list and find the score of the
runner-up

n = int(input()) # Read the number of elements
arr = list(map(int, input().split())) # Read the array elements
arr1 = set(arr) # Remove duplicates
arr2 = sorted(arr1) # Sort the array
print(arr2[-2]) # Print the second largest number

4. Finding the Percentage in Python?
The provided code stub is read in a dictionary containing key/value pairs of name:[Marks]
for a list of students. Print the average of the marks array for the student name is provided,
showing 2 places after the decimal.

n = int(input())  # Read the number of students
student_marks = {}  # Dictionary to store student names and their marks

for _ in range(n):
    name, *line = input().split()
    scores = list(map(float, line))
    student_marks[name] = scores

query_name = input()  # Read the query student name

l1 = list(student_marks[query_name])
addition = sum(l1)
result = addition / len(l1)

print('%.2f' % result)  # Print the average with two decimal places

5. To solve the Python list problem.
Consider a list (list = []). You can perform the following commands:
● insert i, e: Insert integer e at position i.
● print: Print the list.
● remove e: Delete the first occurrence of integer e.
● append e: Insert integer e at the end of the list.
● sort: Sort the list.
● pop: Pop the last element from the list.
● reverse: Reverse the list.
Initialize your list and read in the value of n followed by n lines of commands where each
command will be of the 7 types listed above. Iterate through each command in order and
perform the corresponding operation on your list.

N = int(input())  # Get the number of commands
List = []  # Initialize an empty list

for i in range(N):
    command = input().split()  # Split the input into a list of commands and arguments
    
    if command[0] == "insert":
        List.insert(int(command[1]), int(command[2]))  # Insert an element at a specific position
    elif command[0] == "append":
        List.append(int(command[1]))  # Add an element to the end of the list
    elif command[0] == "pop":
        List.pop()  # Remove the last element from the list
    elif command[0] == "print":
        print(List)  # Print the current state of the list
    elif command[0] == "remove":
        List.remove(int(command[1]))  # Remove the first occurrence of a specific element
    elif command[0] == "sort":
        List.sort()  # Sort the list in ascending order
    else:
        List.reverse()  # Reverse the order of the list

6. To solve a SWAP CASE Python problem.
Task
You are given a string and your task is to swap cases. In other words, convert all
lowercase letters to uppercase letters and vice versa.

def swap_case(s):
    # Initialize an empty string to store the result
    string = ""
    
    # Iterate over each character in the input string
    for i in s:
        # Check if the character is uppercase
        if i.isupper():
            string += i.lower()
        else:
            string += i.upper()
    
    # Return the resulting string with swapped case
    return string

if __name__ == '__main__':
    # Get the input string from the user
    s = input()
    result = swap_case(s)
    # Print the resulting string with swapped case
    print(result)