These job candidates need to practice interview skills

Take a deep breath before entering the interview. Even if you are nervous, try to relax.

Remember why you want the job and try to focus on demonstrating your abilities. It is easier said than done to keep your composure during a job interview. The competitiveness in the current job market also doesn't help the nerves.

CareerBuilder did a survey to find out the common and shocking mistakes job-seekers make during the interview process. After questioning at least 2,400 hiring managers, CareerBuilder received several examples of offensive mistakes:

n Made a list with examples of how previous employer made them mad.

n Ate all the candy in the bowl when answering questions.

n Blew her nose and then placed the used tissues on the table.

n Had a copy of a college diploma that contained White-Out with their name added.

n Wore a hat that said "take this job and shove it."

n Put his beer can in the outside trash can before walking into the reception area.

n Made a friend come into the interview and ask "how much longer."

While most of those examples are very inappropriate, hiring managers also provided examples of common interview mistakes:

n Answering a cell phone or texting.

n Wearing inappropriate workplace attire.

n Looking indifferent.

n Acting arrogant.

n Talking about a current or past employer in a negative manner.

n Chewing gum.

n Providing vague answers.

n Avoiding important questions.

"The good news is that the number of open jobs continues to improve month over month, however, competition will remain high for some time to come," says Rosemary Haefner, CareerBuilder's vice president of human resources. "The goal of any interview is to stand out from the other candidates and ultimately land the job, but make sure you stand out for the right reasons.

"Even though the job search process can be frustrating, candidates should stay positive, focus on their strengths and be prepared on how to best sell their skill set."

Haefner recommends keeping a positive attitude, preparing before the interview, staying in a professional mindset, practicing ahead of time and answering questions honestly.