Broadstairs It Solutions (Opc) Java Developer Interview Questions and Answers

Q1. No one showed up to interview
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Q2. Even they don’t responded to my mails
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Q1. Regular core java, OOPS, Spring Boot questions. It was like a rapid-fire round.
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Q1. Coding question - find repeat elements in an array
Ans. 
Find repeat elements in an array of strings
• Iterate through the array and store each element in a HashMap with its count

• Check if the count of any element is greater than 1, then it is a repeat element

• Return the repeat elements found in the array
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Q2. Project related questions
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Q3. Build a basic CRUD REST API endpoint
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Build a basic CRUD REST API endpoint
• Create a REST API endpoint for each CRUD operation (Create, Read, Update, Delete)

• Use HTTP methods like POST, GET, PUT, DELETE to perform CRUD operations

• Implement data validation and error handling for each operation

• Utilize a framework like Spring Boot or Express.js to simplify API development
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Q1. Behavioral questions
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Q2. Technical questions about SpringBoot and microservices
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Q3. SQL question - third highest salary
Ans. 
To find the third highest salary in a SQL table, you can use the 'SELECT TOP 1' statement with 'ORDER BY salary DESC OFFSET 2 ROWS FETCH NEXT 1 ROWS ONLY'.
• Use the 'SELECT TOP 1' statement to retrieve only one record

• Order the records by salary in descending order using 'ORDER BY salary DESC'

• Skip the first two highest salaries using 'OFFSET 2 ROWS'

• Fetch the next record after skipping the first two using 'FETCH NEXT 1 ROW
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Implementation of the Spring security

Q1. All basic java question
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Q1. Java 8 new features
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Java 8 introduced several new features including lambda expressions, streams, and default methods.
• Lambda expressions allow for functional programming and simplify code.

• Streams provide a way to process collections of data in a functional way.

• Default methods allow for adding new methods to interfaces without breaking existing implementations.

• Other new features include the Date and Time API, Nashorn JavaScript engine, and...read more
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Q2. Stream api coding questions
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Q1. Your last project
Ans. 
Developed a web-based inventory management system for a retail company
• Used Java, Spring Boot, and MySQL for backend development

• Implemented a responsive UI using AngularJS and Bootstrap

• Integrated barcode scanning functionality for faster inventory management

• Implemented user authentication and authorization using Spring Security

• Deployed the application on AWS EC2 instance
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Q2. Challenged faced in last project
Ans. 
Integrated a new payment gateway in the project
• Had to understand the API documentation of the payment gateway

• Had to modify the existing codebase to integrate the new gateway

• Had to test the integration thoroughly to ensure it works as expected
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For freshers there is online aptitude test.

Coding round is done by interviewers on live screen sharing

Q1. Here they discuss about projects and work in depth.
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Q1. Tell me about yourself? What are your hobbies? If you get chance to work with our company what is your expectations from us?
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Q2. Discuss about policies and work culture
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Q1. What is your expectations from mindtree ?
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Q2. As I am fresher I want a good environment to implement my theoretical knowledge to practical.your company also working on Java and I have done multiple projects on Java.
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Q1. What does you know about oops
Ans. 
OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.
• OOPS is based on four main concepts: Encapsulation, Inheritance, Polymorphism, and Abstraction.

• Encapsulation is the process of hiding the implementation details of an object from the outside world.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objects of d...read more
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Q2. So give answer according to you
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Q1. Core java , jdbc template, basic rest questions...restcontroller vs controller, springbootappliaction annotation,multithreading.
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Q1. Asks about current salary..gets shocked with current CTC. I tell her my expectations, she says you better go with current offers in hand. Why do I had to go through all interview process if you could not p...read more
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