Often times young people attend for interviews and return with a lot of expectation but begin to wonder when they never get to hear again from their potential employers.
There are a lot of people out there going after the jobs that are available so you must know that 'when you are competing with top talents there's no second chance to make a first impression'
The following are some of the fatal mistakes you must avoid at job interview
(1) Attempting to interview without preparation
(2) Annoying interviewers by answering a question that was not asked.
(3) Providing verbose (too many) information- you must be brief, thorough and straight to the point
(4) Failure to listen to questions.
(5) Boring interviewers with your personal tales of woes-ie your problems, reasons you havent got a job etc
(6) Having no knowledge of your job requirements
(7) Having no knowledge of your prospective employer. The internet or any medium can provide this effectively.
The last two are dangerous and may show you as unserious fellow when you cant answer convincingly when questions are asked in this regards.
Best of Luck