KocharTech Backend Developer Interview Questions and Answers

Q1. Latest project explanation with application architecture, tech stack used. Business logic implemented
Ans. 
Developed a web application for online shopping with microservices architecture using Node.js, Express, MongoDB, and React.
• Implemented microservices architecture to improve scalability and maintainability

• Used Node.js and Express for backend development

• Utilized MongoDB for database management

• Implemented React for frontend development

• Implemented business logic for user authentication, product management, and order proces
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Q2. Create an api based on your latest project with coding standards, SOLID principles (need to code in the laptop provided) interviewer assess the code.
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Q3. What are the design patterns you have used and explain them within your project context
Ans. 
I have used the Singleton, Factory, and Observer design patterns in my projects.
• Singleton pattern: Used to ensure a class has only one instance and provides a global point of access to it. For example, I implemented a Logger class as a Singleton to manage logging throughout the application.

• Factory pattern: Used to create objects without specifying the exact class of object that will be created. For instance, I used a F...read more
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Q4. Write linq queries to get order id and list of products (based on latest project)
Ans. 
Use LINQ queries to retrieve order id and list of products based on latest project.
• Use OrderByDescending to get the latest project first

• Join Order and Product tables on OrderId

• Select OrderId and list of Products
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Q5. Write sql query to get 2 nd largest salary
Ans. 
Use SQL query with ORDER BY and LIMIT to get 2nd largest salary.
• Use SELECT statement to retrieve salary column

• Use ORDER BY clause to sort salaries in descending order

• Use LIMIT 1,1 to get the second row
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Q6. Web apps/ api security, performance, unit testing, code review and authentication/authorization related discussions
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Q7. Generic class, generic methods related questions and write code in the board
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Q1. Experience, relevant experience, current company related details
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Q2. Salary discussions/negotiations
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Basic MCQs(SQL, Java Output, Spring) and 2 simple coding with no logic involved

Q1. Very through based on Resume
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Q1. Managerial Round with basic discussion
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Q1. Information about company culture etc.
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It was for 30mins and expected to use Java 8 inbuilt functions

Virtual English test

Q1. Questions around your technical knowledge
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Q1. One-on-one round with head of Group
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Q1. Functional Questions & competency questions
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Excel Test, Aptitude test and English test

Q1. Functional Questions
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Q1. Salary discussion
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Q1. Who is refer you in this company
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Q2. How soon you can join
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Q3. We will not provide you training do it yourself
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Q4. If senior shout on you then what you will do it
Ans. 
I would remain calm, listen actively, and address the situation professionally to resolve any issues.
• Stay calm and composed to avoid escalating the situation.

• Listen actively to understand the concerns being raised.

• Acknowledge the senior's feelings and express willingness to improve.

• Seek clarification on specific issues to address them effectively.

• Follow up after the incident to ensure the relationship remains positive.
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