the general feeling in here is that the more you know the better chances you have of getting the job, this may not always prove true. in some circumstances, perhaps when dealing with large companies, it normally comes down to the Human Relations person as to whom gets the job on offer, no matter how much you know. they try to gauge your personality and "people skills" etc. to see if you are right for the job.

google: "what the HR people want and how to give it to them with a smile"

but in _general_ the more you know, the better your chances, especially if what you know ties in together nicely.