There are a number of sites online that offer online placement tests. You can take these to add a valuable certification to your resume. One sight is placement season which provides you with the best free mock tests. You can also take online course which end by giving you an online certificate. These include the Online CAT coaching classes which offer preparation classes and then a final test to assess your learning.
Taking these tests will help you avail a number of advantages and add valuable achievements to your resume that will ultimately help you in your placements. Not only will it help you get the job, the skills learned will also be of extreme use during your job.