You attend a job interview and are so grateful for the opportunity and so eager to land the job that you decide, in your excitement, to give the interviewer a big hug.

Needless to say, that sort of approach will not make a good impression.

Just as unhelpful are bad posture or lack of eye contact.

Securing an interview may not be easy, and the last thing you want to do is to kill your chances quickly at an interview.

Here are more sure-fire ways of making a bad impression.

Take mum along

A job interview can be intimidating. You will be nervous and even fearful, but this is no excuse for taking the woman or man in your life to the interview.

"We have come across interviewees who bring their parents, boyfriend or girlfriend to the job interview," says Mr Josh Goh, assistant director of corporate services from recruitment firm The GMP Group.

"A job interview is never an outing for family members, children, a spouse or partner. So, job seekers should not bring anyone else other than themselves to the interview."

Bad-mouth past employers

You just left your previous employment because your boss is from hell. You can't contain your anger and are ready to tell the whole world about it. But stop yourself.

Never talk negatively about previous employers, say human resource experts.

"We've seen many candidates ruin their job prospects by making derogatory remarks about their current or previous employers and experiences. This is absolutely inexcusable," says Ms Gwen Lim, human resource division manager at Robert Walters Singapore.

"Try to find the positive aspects of your employment history and focus on these instead.

"In particular, some contractors can also be too honest regarding their situation and why they are considering a contract.

"Whatever your reasons for looking for a new job, you should present them in as positive a light as possible."

Focus on coffee breaks

A mid-day caffeine fix is what you live for at work. Nevertheless, a coffee break is not something that you raise early in the interview.

Employers are keen to find out how you can contribute to the organisations and you should be focusing on this.

"The attitude of some inexperienced job seekers can be rather atrocious," says Mr Goh.

"Instead of exuding the feeling of 'ask not what your employer can do for you, but what you can do for your employer', young job seekers often focus on their individual demands before the employer's needs.

"They would focus on coffee breaks, allowances, bonuses and other trivial details, instead of positioning themselves as the best candidate for the job and how they can contribute to the organisation."

Be hostile or defensive

Sometimes, an interviewer may become difficult or may throw interviewees off guard with an irrelevant question.

Interviewees should remain calm and never respond with the same hostility, says Mr Goh.

Listen carefully to the questions and take a bit of time to compose your thoughts before responding, he adds.

"Candidates must be aware that some interview questions are meant to probe and pressure them, so as to see their natural response to situations," says Mr David Leong, managing director of PeopleWorldwide Consulting.

Remember, it's a no-no to tell the interviewer that his question is irrelevant, he says.

"Questions can be irreverent and irrelevant so candidates should not take these personally or be exceptionally defensive.

"Have an open mind and reply with a tad of humour and ease."