He's talking about certifications that techies can get to "prove" their mettle in the IT industry. Net+ and A+ are the entry level certifications, and as noted above generally cover the most basic stuff.

When I started with my certifications in '99 there was a series of books called Exam Cram. The "practice" tests were verbatim the questions that Microsoft actually asked. They were often in the same order. One could memorize the 50 answers, never read the questions and still pass. More recently the book versions have had actual practice questions, as have many of the more legitimate online versions.

Then there are the vendors like Test King. They are like the original Exam Cram series. The questions are lifted verbatim - including the typos - and do very little in terms of education or ensuring that the candidate actually has the knowledge. But they sure help make sure you pass.

If you actually know the content then you don't need the practice tests to pass. If you are looking to use them as study guides, go with Transcender. If you are just looking to pass and get it over with go with Test King.