[Solved] Given this method in a Spring Boot controller:@PutMapping("/users/{id}") public ResponseEntity updateUser(@PathVariable int... }What will be the response body when a PUT request is sent to /users/5? | Spring Boot

Spring Boot - REST Controllers

Given this method in a Spring Boot controller:

@PutMapping("/users/{id}")
public ResponseEntity updateUser(@PathVariable int id, @RequestBody User user) {
    return ResponseEntity.ok("User " + id + " updated");
}

What will be the response body when a PUT request is sent to /users/5?

A"User updated"

B"User 5 updated"

C"5 updated"

DEmpty response

Step-by-Step Solution

Solution:

Step 1: Analyze the method return statement
The method returns ResponseEntity.ok with a string concatenating "User ", the id, and " updated".
Step 2: Substitute the path variable value
When the PUT request is to /users/5, id = 5, so the response body is "User 5 updated".
Final Answer:
"User 5 updated" -> Option B
Quick Check:
Response body includes ID = "User 5 updated" [OK]

Quick Trick: PathVariable values appear in response if used in return [OK]

Common Mistakes:

Ignoring path variable in response
Assuming empty response
Confusing with request body content

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More Spring Boot Quizzes

Given this method in a Spring Boot controller:

Step 1: Analyze the method return statement

Step 2: Substitute the path variable value

Final Answer:

Quick Check:

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