Filler words such as "um," "ah," "you know," "OK" or "like" tell the interviewer you're not prepared and make you sound like a Valley Girl (or Boy).
A singsong or rising inflection at the end of every sentence creates a tentative impression and makes it sound as though you're asking a question instead of making a definitive statement
The interviewer may question your education when you use incorrect grammar or slang. Expressions such as "ain't" "she don't," "me and my friend" and "so I goes to him" aren't appropriate.
Slurring words together or dropping their endings impairs the clarity of your message. To avoid slurring and increase understanding, speak slowly during an interview
While everybody is a bit anxious during an interview, you don't want your information to fly by like a speeding bullet. A rapid speaking rate is difficult to follow, and speed talkers are seen as nervous.
Wimpy words modify or water down your conviction and in the end your position. When you pepper a conversation with "hopefully," "perhaps," "I feel," "kind of" and "sort of," the message you convey is a lack of confidence. Use power words such as "I'm confident that," "my track record shows," "I take the position that," "I recommend" or "my goal is." The language you use gives the listener an impression about your level of confidence and conviction.