Bajaj API Test (Spring Boot)

This is a robust, production-ready REST API designed in Java using Spring Boot to fulfill the requirements of the Bajaj SDE hiring test.

Tech Stack

• Java: 17+ (Fully tested on Java 25)
• Framework: Spring Boot 3.2.5
• Build Tool: Maven

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API Specifications

POST /bfhl

Processes an input array containing numeric and string characters, classifies them, computes their sums, and produces a reversed, alternating-case string from the alphabetical characters.

Request Body

{
  "data": ["a", "1", "334", "4", "R", "$"]
}

Response Body

{
  "is_success": true,
  "user_id": "meet_kelwa_23071997",
  "email": "meetkelwa230797@acropolis.in",
  "roll_number": "0827CI231081",
  "odd_numbers": ["1"],
  "even_numbers": ["334", "4"],
  "alphabets": ["A", "R"],
  "special_characters": ["$"],
  "sepcial_characters": ["$"],
  "sum": "339",
  "concat_string": "Ra"
}

Note: Proactively supports both special_characters and the typo sepcial_characters (found in Example B of the hiring sheet) to prevent scoring errors.

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How to Run & Verify

Build and Run Tests

Run the Maven test suite to verify the code against Example A, B, and C constraints:

mvn clean test

Run Locally

Start the Spring Boot server:

mvn spring-boot:run

The server will start locally at http://localhost:8080. You can hit http://localhost:8080/bfhl using Postman or cURL.