There are various tests available, depending on what your requirement is. At the top level are various standard certifications such as MCSE, CISCO, and RHCE. At the bottom is MS-CIT. Participating in programming community events like Oracle and Google summer contests, open-source projects, etc., are additional areas in which programmers can showcase their talent. There are online tests conducted by sites like Brainbench. When attending these tests, ensure you do your homework on Google based on your actual requirements.