Error guessing is a testing technique based on guessing. It is not just guessing, but the skill of a tester. The tester acquires this skill from his prior experience in testing. This technique has got important significance in testing, and is discussed below.
'Completely Automated Public Turing Test to tell computers and humans apart' or simply 'CAPTCHA' is something that we come across in the Log in / contact form of almost every modern website. As the name suggests, it is used to differentiate between humans and computers. It is a test which usually comes in the form of mathematical questions (Number Captcha) or image recognition (Image Captcha) for the users to solve, in order to login and access certain pages in the websites. 'ReCaptcha' is also a type of captcha which contains an image with 2 words.
Search box helps a user to search data within the website. Following are the test cases / checklists for default Drupal 7 search box