XenonStack Data Engineer Interview Questions and Answers

Q1. Basics of Data structures, C++
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Q2. How do you reverse an array
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To reverse an array of strings, iterate through half of the array and swap elements from start and end.
• Iterate through half of the array

• Swap elements from start and end of the array
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1) Query for the second highest salary. 2) Determine the frequency of characters in a string and remove those that do not repeat. 3) For a string, convert characters with an odd number of occurrences to lowercase, and replace those with an even number of occurrences with the preceding character.

Q1. Some sql queries and theoritical questions about sql.
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Q2. Everything in your resume will be asked.
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Q1. DSA Structures and Tests
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Understanding of data structures and algorithms is crucial for software engineering roles.
• Knowledge of common data structures like arrays, linked lists, trees, graphs, etc.

• Understanding of algorithms like sorting, searching, dynamic programming, etc.

• Ability to analyze time and space complexity of algorithms.

• Experience in writing efficient code using data structures and algorithms.

• Familiarity with common data structure ...read more
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Q2. Question on vertx
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Q1. Need to find output of given code
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Q2. Solve some puzzles
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Q1. Problem Statement on Javascript Debugging, Core CSS, React Implementation questions
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Q1. Details asked regarding past projects, past experience in detail and in-depth technical questions based on past projects
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Good questions were asked they will check aptitude knowledge

Three questions were there one easy 2 medium

Q1. What's your weaknesses
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Q2. Whats your family background
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