Blackbuck Insights Senior Data Engineer Interview Questions and Answers

Q1. Given a string, find the longest length palindromic substring in the given string.
Ans. 
Find the longest palindromic substring in a given string.
• Use dynamic programming to solve the problem efficiently.

• Start with the base cases of single characters and two characters.

• For longer substrings, check if the first and last characters match and if the substring between them is also a palindrome.

• Keep track of the longest palindrome seen so far.

• Time complexity: O(n^2), space complexity: O(n^2).
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Q1. Mention the most challenging technical problem you had to solve.
Ans. 
Developing a real-time data processing system for a high-traffic website.
• Designing a scalable architecture to handle the high volume of incoming data.

• Optimizing the data processing algorithms to minimize latency.

• Ensuring data consistency and accuracy in a distributed system.

• Implementing fault-tolerant mechanisms to handle system failures.

• Testing and debugging the system under various load conditions.
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Q2. Some minor low level entity design.
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Q1. About the experience and what I did
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Give me a palindrom of string related question

Q1. System design based on how to scale something
Ans. 
To scale a system, consider horizontal and vertical scaling, load balancing, caching, database sharding, and microservices architecture.
• Implement horizontal scaling by adding more instances of the application to distribute the load.

• Consider vertical scaling by upgrading the hardware resources of the existing server.

• Use load balancing to evenly distribute incoming network traffic across multiple servers.

• Implement cachin...read more
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