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1.- Which class of HTTP status codes is used to indicate a client error?

1. 1xx class

2. 3xx class

3. 4xx class

4. 4xx or 5xx classes, depending on the type of the error

2.- Which of the following sentences about the HTTP protocol are true?

1. It’s a stateless protocol

2. It’s a binary-based protocol

3. GET, POST and DELETE are idempotent methods

4. GET, HEAD and OPTIONS are safe methods

3.- What is the purpose of the TRACE method?

1. Performance

2. Debugging

3. Security

4. Caching

4.- Given the following HTTP request, what is the value of Request::getScheme()?

GET / HTTP/1.1
Host: localhost:8000
Accept: text/html
X-Scheme: tcp

1. tcp

2. localhost

3. 8000

4. http

5.- If you go to https://example.com, what is the port that the webserver is listening to?

1. 21

2. 80

3. 443

4. 8080

6.- Are responses to the OPTIONS method cacheable?

1. yes

2. no

7.- Which of the following steps must be done in order to serve gzipped responses from Symfony apps?

1. Call to the setCompression() method of the Response object, passing the value gzip.

2. Check if application/gzip is in the array returned by the getAcceptableContentTypes() method of the Request object, and in that case, gzip the contents with gzencode()

3. Set the option framework.request.compression to gzip.

4. Nothing must be done, this is handled by the web server.

8.- If the webserver returns the CSS file styles.css compressed with GZIP, what is the value of the Content-type header?

1. application/gzip

2. text/css

3. text/css+gzip

4. deflate

9.- How does the browser communicate to the server what is the preferred language of the user?

1. The main language is included in the User-Agent header

2. User languages preferences are sent using the Accept-Language header

3. The main language is sent using the Locale header, while secondary languages are usually included in the X-Locale-Alternate header.

4. The browser doesn’t communicate the language of the user, it’s inferred from the user IP

10.- Given the following controller, what is the content returned by a HEAD request?

// AppBundle/Controller/BookController.php
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

class BookController {
    public function indexAction(Request $request)
    {
    return new Response($request->getHttpHost());
    }
}

1. HEAD

2. GET

3. HTTP

4. Empty response

11.- Which of the following sentences are true about the DELETE method?

1. It asks the server to delete a resource

2. It may not be available in all browsers

3. It must return "105 Deleted" as status code

4. It was removed in HTTP 1.1

12.- What HTTP status code would you return if http://example.com/1 is not available temporarily and want to redirect all requests to http://example.com/2 until it gets back?

1. 200

2. 204

3. 301

4. 302

13.- In the HTTP protocol, can the same URI accept more than one method?

1. Yes

2. No

14.- What exception must be thrown in Symfony to generate a HTTP 404 status code?

1. Symfony\Component\HttpKernel\Exception\NotFoundHttpException

2. Symfony\Component\HttpKernel\Exception\ConflictHttpException

3. Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException

4. Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException

HTTP

Test your knowledge on HTTP protocol.