Dear thisistanya;
Remember the nature never repeats anything. That is the universal law. No two leaves on this earth are same, then how two human can be? They may look similar, but can not be the same.
Secondly, during the interview, several other things are also assessed, like family background of a candidate, soft skills, personality, attitude towards different situation, hobbies and many more considering the post and the responsibility expected from that employee on the offered post. An interviewer needs to distingue the differences, between those two. There are ways and techniques to evaluate certain qualities of a persons and an interviewer should know it. Moreover an interviewer should be clear about the required quality of a person for the post to be offered.
I hope you will agree with my views.
His Blessings;
Shard Shah
NB: I would like to say something more from my experience, that it is not possible to judge a person in few minutes interview. Many a time the judgment proves wrong, when the expected results are not yielded. I learned that the culture of the corporate house is more important rather then the candidate, as several good candidates are failed or became lethargic, if the culture of that corporate is such. On the other end, several dull candidates proved better performer, in good cultured corporate. I shall be happy to read views of other members on this subject.