Lepton Software Export & Research Software Engineer Interview Questions and Answers

Dsa. , oops and basics of database management

Q1. System design questions basics
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Q2. Hiring managers questions
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There were 3 questions, which I had to do in 2 hours.
the questions were from arrays and Strings

Q1. They asked me concepts on OOPS and OS, also coding question on strings. all these were basic questions
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Q1. Questions such as where do you see yourself in coming years, interests and hobbies.
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Basic Js concepts like debouncing,event loop, and other output-based questions.

Q1. Js concepts in depth
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Q1. Hiring manager round, questions around my project
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Q2. Optimization techniques
Ans. 
Optimization techniques are methods used to improve the efficiency and performance of software applications.
• Use algorithms like greedy, dynamic programming, or divide and conquer to optimize code

• Minimize time complexity by avoiding nested loops and unnecessary iterations

• Utilize data structures like hash tables, arrays, and trees for efficient storage and retrieval

• Profile code to identify bottlenecks and optimize critic...read more
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Q1. It was 1 hr technical round for iOS Developer role. Questions related to project I am working, iOS Development questions like (process of publishing app, push notifications and its uses, Delegates how to u...read more
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Q1. It was 30 min managerial round with one of the technical manager of MRI. Asked technical questions based on my projects. And then tricky questions like why you want to join, why we should hire you, where d...read more
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There were many questions to be solved within an hour, but the expectation was to solve maximum you can.

1 DSA based and 2 SQL coding questions with 5/6 DSA based MCQs

Q1. Write a python code to find missing element ranging from 0 to 100. Write a SQL query to fetch data from multiple tables. Questions based on types on Joins in SQL, Stored Procedures, Views and importance o...read more
Ans. 
Python code to find missing element and SQL query for fetching data from multiple tables.
• Python code to find missing element: Use set difference to find missing elements in range 0 to 100.

• SQL query for fetching data from multiple tables: Use JOINs like INNER JOIN, LEFT JOIN, or CROSS JOIN to combine data from multiple tables.

• Types of Joins in SQL: INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN.

• Stored Procedures: Precompi...read more
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Basic DSA questions related to string and hashmap

Q1. Return true if the sentence use all the vowels else false
Ans. 
Check if a sentence contains all vowels (a, e, i, o, u) at least once.
• Convert the sentence to lowercase to ensure uniformity.

• Use a set to track the vowels found in the sentence.

• Iterate through the sentence and add vowels to the set.

• At the end, check if the set contains all five vowels: a, e, i, o, u.

• Example: 'The quick brown fox jumps over a lazy dog' returns true.
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Q2. When to use BFS, DFS and basic DSA questions?
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