How should a company hire an applicant? is it base on his curriculum vitae?, or how he answers every questions ask.

Actually both,its our responsibility to interact with the candidate and find out whether he or she is worthy for the organization or not.

Hiring the candidate for the vacancy does not depend only on his C V nor his personality.  However, in addition to what have been mentioned he or she must demonstrate a proper knowledge in the field.

>>>>>>>>should be make search for co. first and guess questions to solve and when he answer should make half answer to go to another question which he know and need

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As CV creates first impression, you should take the CV very carefully and then through the Written & Viva and other processes an applicant should be hired.

should be make search for co. first and guess questions to solve and when he answer should make half answer to go to another question which he know and need

Hiring the right candidate for a position shouldn't only be decided by his/ her Resume. Personality, Behavior and Communication skills are important as well. Its an important aspect to find out if the selected person fits into the existing team, and will be an asset or not.