NTT DATA Java Developer Interview: 1st Round Questions & Experience

REST API Design & Validation with Spring Boot | Professional Guide

How do you design a REST API that is secure, consistent, and easy to maintain? In this video, we go beyond simple mapping to explore the architecture of production-ready REST APIs in Spring Boot. From handling complex request payloads to implementing global validation strategies, this is the blueprint for clean backend development.

This module is part of the "Complete Interview Preparation Material for Java Backend Developers." Understanding how to validate data correctly and structure your endpoints is a top requirement for Senior-level roles.

🔍 Key Concepts Covered:
API Design Principles: Resource naming, HTTP methods (GET, POST, PUT, DELETE, PATCH), and status codes.

DTO Pattern: Why you should never expose your Database Entities in your API layer.

Spring Boot Validation: Using @Valid and @Validated effectively.

Custom Constraints: Creating custom annotations (e.g., @ValidPassword, @UniqueEmail) for business-specific rules.

Global Exception Handling: Using @ControllerAdvice and @ExceptionHandler to return uniform error responses.

Видео NTT DATA Java Developer Interview: 1st Round Questions & Experience канала Java is Awesome