Everstage Technologies Private Limited Product Support Engineer Interview Questions and Answers

Will be given Requirement to write code for Restraunt. Based on that have write code for delivering orders by delivery boys.

Q1. OOPS Concepts, Java Basics, Collections, MultiThreading
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Q1. Lazy loading in react
Ans. 
Lazy loading in React is a technique used to improve performance by loading components only when they are needed.
• Lazy loading helps reduce initial load time by splitting the code into smaller chunks.

• React.lazy() and Suspense are commonly used for lazy loading in React.

• Lazy loading is especially useful for large applications with many components.
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Q2. Cache bursting
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Q3. Difference between == and ===
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The difference between == and === is that == checks for equality after type coercion, while === checks for equality without type coercion.
• == is a loose equality operator that performs type coercion before comparing two values.

• === is a strict equality operator that does not perform type coercion before comparing two values.

• Example: 1 == '1' will return true, but 1 === '1' will return false.
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Q1. Largest island (graph question)
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Q2. SQL question related to joins
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Q1. About the databases and questions from system design
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Q1. Questions based on concurrency , suitable databases HLD,LLD,book my show design
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Q1. Salary discussion
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Q1. Implement cache in the given architecture where read and write both are pretty frequent. What are the cache eviction mechanisms and which one should we follow here ?
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Q2. Rotten oranges - leetcode graph question
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Assignment to develop a prototype

Q1. Face to face questions
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Q2. Java Question Technical & coding
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Q3. Mongodb & Mysql Question
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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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It was a combination of aptitude and react mcq questions.

Q1. It was technical round where questions were mostly from JavaScript and a few on React (depends on individual’s experience). You might expect a array/string coding question as well. Example- To find the pai...read more
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Q2. In JavaScript, there were code output questions, ES6 features, hoisting, closures, Arrow functions etc. Css and bootstrap responsiveness questions. All basic questions.
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Q1. Tell me about yourself.
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Q2. Why are you looking for a change?
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Q3. Share details of your previous job.
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Q4. What are your salary expectations?
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Q5. What is your family background?
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Q6. If your location is far from the office (baner road), how would you commute daily? How will you manage once office resumes working from office.
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Mostly questions on logical aptitude

Q1. DSA questions. Reverse word of string, bubble sort, swap two variables without use of third variable
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Q2. OOPs concepts also some questions on project
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Q3. 1 puzzle (refer gfg)
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Q1. Why do you want to work at our company?
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Q2. What was the toughest challenge you have ever faced?
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