This type of software testing is very informal and unstructured and can be performed by any stakeholder with no reference to any test case or test design documents. The person performing Ad-hoc testing has a good understanding of the domain and workflows of the application to try to find defects and break the software.
Wolfram Alpha is a computational search engine (sometimes referred to as an answer engine). The interface looks similar to that of a regular search engine but queries typed into the search box result answers to specific questions rather than listings of websites that may be relevant to the query.
Luckily, you can, and it's very simple. Just click Clear Searches link and your entire search history should be deleted! You may also delete individual searches by clicking the block icon beside your searched query. In the top right corner of your Facebook timeline, click the Activity Log button. 2  On the left sidebar, under the 3rd section (after photos, likes and comments options) , click MORE .