You want to create a POST endpoint that accepts JSON data and returns a confirmation message. Which method signature is correct?

hard📝 Application Q8 of 15

Spring Boot - REST Controllers

A@PostMapping("/create") public void create(@RequestParam User user) { }

B@PostMapping("/create") public String create(User user) { return "User created"; }

C@PostMapping("/create") public String create(@RequestBody User user) { return "User created"; }

D@PostMapping("/create") public String create(@PathVariable User user) { return "User created"; }

Step-by-Step Solution

Solution:

Step 1: Identify how to accept JSON data in POST
Use @RequestBody to bind JSON request body to a Java object.
Step 2: Check method signature correctness
@PostMapping("/create") public String create(@RequestBody User user) { return "User created"; } correctly uses @RequestBody and returns a confirmation string.
Final Answer:
@PostMapping("/create") public String create(@RequestBody User user) { return "User created"; } -> Option C
Quick Check:
Use @RequestBody for JSON input in POST [OK]

Quick Trick: Use @RequestBody to receive JSON in POST methods [OK]

Common Mistakes:

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