criteria for selection in ca campus

Dear

Any one let me now about the criteria for selection by various companies in the CA placement campus.

Any one have the details then please let me now about the same.

criteria (selection of candidates on the basis of interviews or on the basis of merit ranking attain by the candidate, or the marks such type of criteria  and the salary structure for the selected candidates with the marks or ranks, or what ever.)

lets clear me about the same.

regards