A common question in Flask interview questions and answers; don't miss this one. POST, GET, PUT, and DELETE is the most regularly used HTTP methods. These methods relate to the CRUD (create, read, update, and delete) activities. To retrieve data from a URL, HTTP techniques are utilized. The available methods are given below: GET: The GET is the method that sends data to the server unencrypted. HEAD:  HEAD is similar to GET, but it has no response body. POST: The POST server does not cache the HTML form data that it sends PUT: It is the method in which the uploaded content replaces current data representations of the target resources. DELETE: This method removes the current representations of the target resource that is suggested by a URL.