VELOTIO Technologies Senior Data Engineer Interview Questions and Answers

Round duration - 70 Minutes
Round difficulty - Hard

Q1. 
Candies Distribution Problem Statement
Prateek is a kindergarten teacher with a mission to distribute candies to students based on their performance. Each student must get at least one candy, and if two s...read more
Ans. 
The task is to distribute candies to students based on their performance while minimizing the total candies distributed.
• Create an array to store the minimum candies required for each student.

• Iterate through the students' ratings array to determine the minimum candies needed based on the adjacent ratings.

• Consider both left-to-right and right-to-left passes to ensure fair distribution.

• Keep track of the total candies dist
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Q2. 
Merge Sort Problem Statement
You are given a sequence of numbers, ARR. Your task is to return a sorted sequence of ARR in non-descending order using the Merge Sort algorithm.
Explanation:
The Merge Sort...read more
Ans. 
Implement Merge Sort algorithm to sort a sequence of numbers in non-descending order.
• Use Divide and Conquer approach to recursively divide the input array into two halves.

• Merge the sorted halves to produce a completely sorted array.

• Ensure the implementation handles the constraints specified in the problem statement.

• Example: For input [3, 1, 4, 1, 5], the output should be [1, 1, 3, 4, 5].
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If you are a fresher , then this is for you else almost no coding test for experienced candidates.

Q1. Javascript basics, Angular react general questions depends upon profile.
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Q1. They asked general questions related to some hectic situation faced in previous company / project..
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Dsa problems dp and tress problem

Q1. Tell me about your self
Ans. 
I am a passionate software engineer with 5 years of experience in developing web applications using various technologies.
• 5 years of experience in software development

• Proficient in developing web applications

• Skilled in using various technologies

• Passionate about software engineering
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Q2. Projects and intership
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The test was in hackerrank platform, it was moderate level.

Q1. Golang basics related questions
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Q2. Concurrency related questions
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Q1. Testing process and java code
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Q2. Python machine learning questions
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Java and python test was there

2 sum program from Geeks for Geeks

Q1. Ruby basics Eigen class Callbacks
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Q2. Lazy and Eagar loading N+1 problem
Ans. 
Lazy loading delays loading of related data until it is specifically requested, while eager loading loads all related data upfront. N+1 problem occurs when lazy loading results in multiple additional queries being made.
• Lazy loading is used to improve performance by only loading related data when needed

• Eager loading loads all related data upfront to reduce the number of queries made

• N+1 problem occurs in lazy loading whe...read more
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Q3. Puzzles
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Q1. AWS basics with CI/CD
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Q2. Deployment to AWS
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Q1. Basic introduction and salary discussion
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Nothing

Q1. Python Sql Linux CLI
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Q1. General discussions on learning
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