Everest Engineering Lead Software Engineer Interview Questions and Answers

Q1. Self introduction
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Q1. Was asked everything related to the resume. Database skillsets were grilled a lot.
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Design an in-memory queue. Something like Kafka. 1 hr to solve for the same. Need to build producers, consumers and topics. Each message can be of any type, so use generics. Make sure to handle all edge cases like null checks. The code should be functional and runnable by 1 hr.

My friend got something like the Redis cache implementation with get, put and expire functionalities. They had asked him to keep code extensible enough to handle LRU and LFU expiry which was the major challenge. So, can vary based on interviewer too.

3 coding questions with around 15 mcqs on oops and programming

Offline coding test 4 easy to medium dsa questions

Q1. 100 coins and 5 thieves puzzle
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Q2. Behavioural questions
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Q1. Nth Greatest Element III (Leetcode)
Ans. 
Find the Nth greatest element in an array without sorting
• Use a priority queue to keep track of the N greatest elements

• Iterate through the array and add elements to the priority queue

• Return the top element from the priority queue as the Nth greatest element
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Q2. Heater Problem (Leetcode)
Ans. 
Heater Problem - Find minimum radius to cover all houses with heaters
• Sort the houses and heaters arrays

• For each house, find the closest heater using binary search

• Calculate the minimum radius needed to cover all houses
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Q1. Search in 2d matrix
Ans. 
Search for a target value in a 2D matrix efficiently.
• Use binary search on rows to find the potential row where the target value may exist.

• Then use binary search on that row to find the target value.
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Q2. Find quadraplets that sum to target
Ans. 
Find quadraplets in an array that sum up to a target value.
• Use a nested loop to iterate through all possible combinations of quadraplets.

• Keep track of the sum of each quadraplet and compare it to the target value.

• Return the quadraplets that match the target sum.
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DSA, problem solving

System design interview and prior experience in projects

Q1. What was the toughest problem you encountered in your previous assignments ?
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Q2. Given a choice, what would you have done differently in your previous assignments ?
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2 Leetcode Medium questions to be solved within 1 hour

It was taken on meet with 2 medium leetcode questions on String and Linkedlist