Which of the following is the correct way to add a custom header named X-Custom-Header with value 12345 using ResponseEntity in Spring Boot?

easy📝 Syntax Q12 of 15

Spring Boot - Request and Response Handling

Which of the following is the correct way to add a custom header named X-Custom-Header with value 12345 using ResponseEntity in Spring Boot?

Areturn ResponseEntity.header("X-Custom-Header", "12345").body(data).ok();

Breturn ResponseEntity.body(data).header("X-Custom-Header", "12345");

Creturn ResponseEntity.ok().header("X-Custom-Header", "12345").body(data);

Dreturn ResponseEntity.setHeader("X-Custom-Header", "12345").body(data);

Step-by-Step Solution

Solution:

Step 1: Recall ResponseEntity builder pattern
ResponseEntity.ok() starts building a 200 OK response, then header() adds headers, then body() sets the body.
Step 2: Check method chaining order
Correct chaining is ResponseEntity.ok().header(...).body(...). Other orders or methods like setHeader() do not exist or cause errors.
Final Answer:
return ResponseEntity.ok().header("X-Custom-Header", "12345").body(data); -> Option C
Quick Check:
Use ok() then header() then body() [OK]

Quick Trick: Start with ok(), then add header(), then body() [OK]

Common Mistakes:

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