No matter how prepared you are for an interview nor how qualified you are there are 2 critical factors to consider for they will determine if you will get the job or not. Talking Too much and Talking too little.
Talking too much
Communication is key in any conversation and any sign of weakness might be harmful while overconfidence might make you look cocky. Talking too much might have a negative impact as that of talking little, you have to know how to balance them.
In a normal conversation, a brief answer takes 90 seconds which contains enough information to be understandable and, however, a lot of individuals get either nervous to an extent of them not putting themselves together.
You already know where you belong having to estimate yourself with that moment where you were nervous and scared at the same time. When in such a situation try to recollect yourself to avoid unnecessary embarrassment with answers that were not needed if a question is posed to you try to give 2 examples and not 4 this will give both you and the recruiter time to ask questions and even get to know more about you.
Talking Too Little
On the other hand, been a slow communicator or talking little might translate that you are unconfident, reserved or even scared of the environment, the recruiter might not be sure you are the perfect fit for the environment with such behavior.
Interview preparation is essential, this does not matter if you have the experience or not, communication is important and organizations want individuals who can communicate effectively as they will be representing their brand.
For improvements, identify your weakness either if you talk a lot or less. Have a mirror for yourself or even have a friend listen to you and that you can have a good direction, Always remember the key to communication is always be neutral, never talk a lot for they might find you irritating and cut you short and never be too slow or quiet, they might take you to be an unconfident.