Having a certification does not guarantee you a job but its an advantage definitely.
Also, having a certification raises the expectation level of the interviewer and hence the difficulty level of the questions asked also increases a bit.
But, on the brighter side, if you have the knowledge then definitely it will help and besides, it also boosts up your confidence.
You showed up just in time for the waffles! And this tiny ad:
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop