Which of the following method signatures correctly uses @RequestBody to accept a JSON object representing a User in a Spring Boot controller?

easy📝 Syntax Q12 of 15

Spring Boot - REST Controllers

Which of the following method signatures correctly uses @RequestBody to accept a JSON object representing a User in a Spring Boot controller?

Apublic ResponseEntity<String> addUser(@RequestBody User user)

Bpublic ResponseEntity<String> addUser(@RequestParam User user)

Cpublic ResponseEntity<String> addUser(@PathVariable User user)

Dpublic ResponseEntity<String> addUser(User user)

Step-by-Step Solution

Solution:

Step 1: Identify correct annotation for JSON body
@RequestBody is required to tell Spring Boot to convert JSON in the request body to a User object.
Step 2: Check other annotations
@RequestParam reads query parameters, @PathVariable reads URL path segments, and no annotation means no automatic JSON conversion.
Final Answer:
public ResponseEntity addUser(@RequestBody User user) -> Option A
Quick Check:
JSON input needs @RequestBody [OK]

Quick Trick: Use @RequestBody for JSON input, not @RequestParam or @PathVariable [OK]

Common Mistakes:

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