Typical interview blunders
Even if you are extremely qualified, some bad manners at a job interview might harm your chances of getting the job

Finding the appropriate ratio between presenting yourself as a self-assured professional and staying respectful and humble is crucial. Avoid making the following interview etiquette errors:
Arriving at an inconvenient time
Most interview applicants worry about being late when it comes to showing up on time. Aim to arrive more than 10 minutes early; if you need to wait a little while in the lobby, that is OK. Make use of the opportunity to review your notes or work on your opening remarks.
talking with only one person.
There are frequently two or more interviewers present, and failing to address key members of the interview committee might hurt your chances of getting the job. Make sure to address each interviewer individually, making eye contact and speaking to each one in turn. It can appear unfriendly when job hopefuls exclusively address the person with the highest position in the room.
improper clothing
Inappropriate clothing conveys a number of meanings. You convey a lack of professionalism, sloppiness, consideration, and disdain, as well as the fact that you don't take the chance seriously.
The majority of interviewers prefer to see job candidates who are overdressed than those who are underdressed, although severe overdressing also leaves a bad impression. To learn about the dress code, do some research about the business. If you're applying for a job as a journalist, you shouldn't show up in a complete suit, but it could be OK for a career in finance.
Taking video or phone interviews lightly
The fact that many first interviews are performed over the phone or over video shouldn't make you take them less seriously. Follow the proper interview protocol.
Before the interview, test your camera and/or microphone. Set up in a quiet area, and avoid taking calls, answering the door, or conversing with anybody else throughout the interview, If you live with relatives or roommates, let them know that you will be interviewed and ask that they respect your privacy.
It's OK to have your CV and interview notes nearby so that you may refer to them as needed.
Poor body language and communication
Regardless of how intelligent or useful your responses are during an interview, bad body language or communication might cast doubt on you.
During your interview, pay particular attention to communicating politely and clearly. No matter how excited you are to respond to the question, don't interrupt. If you unintentionally speak before the interviewer has finished, instantly apologise and let them finish.
When it's your turn to speak, be sure to speak clearly; stumbling comes across as impolite and lowers your self-esteem.
Pay attention to your body language. While it's normal to shake or tap on your knee when under stress, doing so during an interview puts you at risk of coming across as agitated or impatient. Maintain good eye contact while sitting up straight and minimizing fidgeting.
Being participatory in the subject is the aim. When someone speaks to you and you react, look them in the eye to show respect for them and to show that you are in an active state. Talking to them while often glancing aside or over your shoulder indicates apathy. Candidates should be aware of their tone.
Many job applicants suffer from overconfidence and a lack of knowledge of one's interviewing style.
There is a delicate line between being composed and arrogant, even while having confidence in your abilities and being excited about the value you can bring to a firm that will work to your advantage. No matter how competent you are, acting as if you are entitled to a position will come off as impolite. Keep in mind that you were given the opportunity to interview, and maintain your poise and modesty.