Custom response headers in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a custom header named "X-Custom-Header" with value "Hello" to the response.

Spring Boot

return ResponseEntity.ok().header("X-Custom-Header", [1]).body("Success");

Drag options to blanks, or click blank then click option'

A"Hello"

BHello

C"X-Custom-Header"

D200

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the header value

Using the header name as the value

Using a number instead of a string

The header value must be a string, so it needs to be in quotes like "Hello".

2fill in blank

medium

Complete the code to set the "Cache-Control" header to "no-cache" in the response.

Spring Boot

return ResponseEntity.ok().header("Cache-Control", [1]).body("Data");

Drag options to blanks, or click blank then click option'

A"no-cache"

B"cache"

C"private"

D"public"

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect cache directives

Omitting quotes around the value

Using unrelated strings

The correct value to prevent caching is "no-cache" as a string.

3fill in blank

hard

Fix the error in the code to add a header "X-Rate-Limit" with value 100 as a string.

Spring Boot

return ResponseEntity.ok().header("X-Rate-Limit", [1]).body("Limit set");

Drag options to blanks, or click blank then click option'

A100

B"100"

CString.valueOf(100)

DInteger.toString(100)

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a number instead of a string

Using methods that return strings but not as literals

Omitting quotes

Header values must be strings. Using "100" ensures the value is a string literal.

4fill in blank

hard

Fill both blanks to add header "X-App-Version" with value "1.0".

Spring Boot

return ResponseEntity.ok().header([1], [2]).body("Info");

Drag options to blanks, or click blank then click option'

A"X-App-Version"

B"1.0"

C"X-Env"

D"prod"

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping header names and values

Omitting quotes

Using wrong header names

The first blank is the header name "X-App-Version" and the second blank is its value "1.0".

5fill in blank

hard

Fill all three blanks to add headers "X-User" with value "admin", "X-Role" with value "editor", and "X-Status" with value "active".

Spring Boot

return ResponseEntity.ok()
  .header([1], [2])
  .header("X-Role", [3])
  .header("X-Status", "active")
  .body("User info");

Drag options to blanks, or click blank then click option'

A"X-User"

B"admin"

C"editor"

D"guest"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up header names and values

Using wrong values

Forgetting quotes

The first header name is "X-User", its value is "admin", and the second header value is "editor" for "X-Role".