Even though Honesty is important in an Interview, you need to still jazz up certain stuff or underplay your weaknesses. That much of covering up (not exactly lying) is totally fine. Confidence and the way you speak matter a lot. Interviews can get tricky when its in front of a panel. That is when you need to really be smart to crack it.

What to Do: Be confident and express yourself clearly with a strong voice and good diction and grammar.
Pay close attention to your personal appearance; dress to your advantage.
Do look the interviewer in the eye (but don't stare him or her down)
Do have as much knowledge about the industry, employer, and position as possible.
Do have prepared questions about the employer and position.
Do display a sense of humor.
Do offer a firm handshake.

What not to do: Don't be overbearing, overaggressive or conceited.
Don't show a lack of interest or enthusiasm
Don't emphasize money as your main interest in the job.
Don't make excuses for unfavorable factors on your record.
Don't condemn past employers or institutions of education; keep comments positive.
Don't display a marked dislike for schoolwork.
Don't interview unless you are interested in the job...don't just "shop around."