PubMatic Interview Questions and Answers for Freshers

I prefer Python because of its simplicity, readability, and extensive libraries.

• Python is known for its simplicity and readability, making it easier to write and understand code.

• Python has a large number of libraries and frameworks that can be used to quickly develop applications.

• Python's syntax is clean and concise, allowing for faster development and easier maintenance.

• Python is widely used in various domains such as web development, data analysis, and machine learning.

• Pyth...read more

Implement a stack data structure using an array of strings.

• Use an array to store the strings in the stack.

• Implement push() and pop() functions to add and remove elements from the stack.

• Keep track of the top of the stack using a variable.

Detecting a loop in a linked list

• Use two pointers, one moving at double the speed of the other

• If there is a loop, the two pointers will eventually meet

• Use Floyd's Cycle Detection Algorithm for efficient solution

To solve the issue of mistakenly assigned gender values in SQL, you can update the incorrect values using SQL queries.

• Identify the incorrect gender values in the SQL table

• Use UPDATE statement with appropriate conditions to correct the values

• For example, if 'F' is mistakenly assigned for male, update it to 'M' using UPDATE statement

Count the occurrences of a particular word from a file.

• Read the file and store its contents in a string variable.

• Split the string into an array of words using a delimiter.

• Loop through the array and count the occurrences of the particular word.

• Return the count.

Code to validate all use cases for an IP address input string and output yes or no.

• Use regular expressions to match the input string against the valid IP address pattern.

• Check for valid ranges of each octet (0-255) and proper formatting (4 octets separated by periods).

• Handle edge cases like leading zeros, extra spaces, and invalid characters.

• Return 'yes' if the input string is a valid IP address, otherwise return 'no'.