ZeMoSo Technologies Interview Questions, Process, and Tips

Q1. Explain Node.js event driven architecture.
Ans. 
Node.js event driven architecture is a non-blocking, asynchronous model where events trigger callbacks.
• Node.js uses an event loop to handle asynchronous operations.

• Callbacks are registered for specific events and executed when the event occurs.

• Event emitters in Node.js trigger events that are handled by listeners.

• Example: Reading a file asynchronously in Node.js using fs module.
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Q1. DSA question, JavaScript questions, node.js, database and cloud
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Q1. Code optimisation
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Coderbyte test on DSA and few Stack related MCQs.

Q1. DSA question related to Arrays, difficulty level medium.
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Q2. Stack related questions like mine was MERN, so question on Nodejs, Database schema design, reactjs and Javascript basics.
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Q3. This was taken by Flocareer, Zemoso hired them to evaluate me.
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Q1. Discussed overall experience on different types of products and how I deal with those. And one coding question.
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Q1. Again full interview on MERN STACK with one coding question on coderbyte.
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Given a list of integer find the longest increase sequence

Q1. Given a list of integer find the first non repeating integer using stream API of Java 8.
Ans. 
Find the first non-repeating integer in a list using Java 8 stream API.
• Use Java 8 stream API to group integers by count

• Filter out integers with count greater than 1

• Return the first non-repeating integer
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Q2. Questions on core java like how internationally string works, hashmap etc And questions on database like what is indexing How to optimize SQL queries etc
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Q1. Given a Map of fruits with there price as a key value pair respectively, find the fruit whose price is maximum using Java 8 Stream API.
Ans. 
Using Java 8 Stream API to find the fruit with maximum price in a Map of fruits.
• Use entrySet() method to get a stream of key-value pairs from the Map.

• Use max() method with Comparator.comparing() to find the entry with maximum price.

• Extract the key (fruit) from the entry with maximum price.
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Q2. Write a program to check whether the parenthesis are properly balanced or not, means for every opening brace these should be a closing brace present.
Ans. 
Program to check if parenthesis are properly balanced
• Use a stack data structure to keep track of opening parenthesis

• Iterate through the input string and push opening parenthesis onto the stack

• When a closing parenthesis is encountered, pop from the stack and check if it matches the corresponding opening parenthesis

• If stack is empty at the end and all parenthesis are matched, then the input has properly balanced parenthe
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Q3. Questions on core Java, Spring Boot, JPA, and Microservices you should have strong foundation in these topics questions asked like 1) what is API gateway 2) how 2 services communicate with eachother 3) ...read more
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Q1. DSA probelms and java oops concepts
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Q1. DSA JAVA, SRINGBOOT - DESIGN PATTERNS
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Q1. HR discussion on how the company works and hr explained the work culture. Salary discussion and benefit
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Q1. Based on nodejs and expressjs
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Q2. Based on mongodb
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Q1. Advanced knowledge on nodejs, expressjs, mongodb and aws
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Q2. 2 coding questions
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Q1. Salary discussion
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Coding test includes 2 codes and some mcq questions

Q1. Introduce yourself and project
Ans. 
I am a software engineer with experience in developing web applications using Java and JavaScript.
• Experienced in Java and JavaScript programming languages

• Developed web applications using Spring Boot and React

• Familiar with Agile development methodologies
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Q2. Coding questions
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Q1. Project pverview
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Q2. Basic technical questions
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