ResponseEntity and HTTP Status Codes | Spring Boot Interview Series #15

In this video, we will discuss **ResponseEntity and HTTP Status Codes in Spring Boot**. This is Video #15 of our **Spring Boot Interview Series**. In the previous video, we discussed **Request Body, Response Body and JSON Conversion**. We understood how Spring Boot reads JSON request data using `@RequestBody` and returns Java objects as JSON response. Now, in this video, we will understand how to return a proper response body along with the correct HTTP status code using `ResponseEntity`. Topics covered in this video: 1. What is `ResponseEntity` in Spring Boot? 2. Why do we use `ResponseEntity`? 3. Common HTTP status codes in REST APIs 4. Difference between returning an object directly and returning `ResponseEntity` 5. How to create a proper custom API response structure In REST APIs, returning only data is not always enough. For example: `GET /courses/101` Course found → `200 OK` `POST /courses` Course created → `201 Created` `DELETE /courses/101` Deleted successfully with no body → `204 No Content` `GET /courses/999` Course not found → `404 Not Found` Using `ResponseEntity`, we can control: Response body HTTP status code Response headers We will also discuss how to create a common API response structure using fields like `success`, `message`, and `data`. By the end of this video, you will be able to clearly explain `ResponseEntity`, HTTP status codes, direct object return vs `ResponseEntity`, and custom API response structure in Spring Boot interviews. Watch the complete Spring Boot Interview Series playlist: [   • Spring Boot Interview Questions  ](   • Spring Boot Interview Questions  ) Connect with me on LinkedIn:   / deep473   Subscribe to *Hosiyar.com* for more Java, Spring Boot, Backend Development, and Interview Preparation content. #SpringBoot #ResponseEntity #SpringBootInterviewQuestions #RestAPI #JavaInterview #JavaBackend #HosiyarDotCom