Coupa Software Inc Full Stack Developer Interview Questions, Process, and Tips

Coding round is midium level

Q1. Interview is deeper on projects
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Q2. Write rest APIs of project
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Develop REST APIs for project functionality
• Define endpoints for different functionalities (e.g. GET /users, POST /users)

• Implement CRUD operations using HTTP methods (GET, POST, PUT, DELETE)

• Use proper authentication and authorization mechanisms (e.g. JWT tokens)

• Handle error responses and status codes appropriately (e.g. 404 Not Found, 500 Internal Server Error)
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Q3. What is oops in java
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Object-oriented programming concepts in Java
• OOPs stands for Object-Oriented Programming

• It is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures

• Encapsulation, Inheritance, Polymorphism, and Abstraction are the four main principles of OOPs in Java

• Example: Class, Object, Inheritance, Polymorphism, Encapsulation
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Q4. What is jvm in java
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JVM stands for Java Virtual Machine, which is an abstract computing machine that enables a computer to run Java programs.
• JVM is responsible for converting Java bytecode into machine code that can be executed by the computer's processor.

• It provides a platform-independent execution environment for Java programs.

• JVM manages memory, handles garbage collection, and provides security features for Java applications.

• Examples o...read more
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Q5. What is overloading and overriding
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Overloading is having multiple methods in the same class with the same name but different parameters. Overriding is implementing a method in a subclass that is already defined in the parent class.
• Overloading allows a class to have multiple methods with the same name but different parameters.

• Overriding involves implementing a method in a subclass that is already defined in the parent class.

• Overloading is resolved at com...read more
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