Worldline Java Developer Interview Questions and Answers

3 coding questions were given and to be solved only in java

Java coding and apptitude questions

Q1. Tell me about project
Ans. 
I worked on a project to develop a web application for an e-commerce company.
• Developed the front-end using HTML, CSS, and JavaScript

• Implemented the back-end using Java and Spring framework

• Integrated payment gateway and order management system

• Optimized database queries for improved performance
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Q2. Tell about previous company
Ans. 
I worked at XYZ Company as a Java Developer.
• Developed and maintained Java applications for XYZ Company.

• Collaborated with a team of developers to implement new features and fix bugs.

• Used Java frameworks like Spring and Hibernate to build robust and scalable applications.

• Worked on database design and optimization using SQL.

• Participated in code reviews and provided feedback to improve code quality.

• Implemented unit tests t...read more
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Q1. Dependency injection
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Q2. What are oops concepts
Ans. 
Object-oriented programming concepts that focus on data encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: bundling data and methods that operate on the data into a single unit (class)

• Inheritance: ability of a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types

• Abstraction: hiding the complex implementation details
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Q1. On demand video assessment that include questions to answer.
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Q2. Games designed to test different ability.
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It continues for 15 mins

Q1. Basic core Java question
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Q2. Sql query based question
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Q1. Normal coding question and work experience based question
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Q1. Oops, mvc, design principles
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