...and you get an interview, it would be sensible to do some preparation before the interview?
I have been interviewing for a number of jobs over the past few months. A lot of the interviewees have been women who want to return to work after having stayed at home with their children for a number of years. Good CV, good covering letters. Presence, aptitude and general awareness and intelligence at interview, zilch.
If the interview says it will be "competency based" you can look up on the internet what this is likely to mean. And, dammit, there are even sample questions! And if you read the job spec, it will give you some fairly massive clues as to what the competencies might be! If you are asked what you do to get to know new team members, don't say "I am very shy. I would wait for people to talk to me." If you are asked why you applied for the job, and what interested you about it, don't say "I thought I could probably manage to do it." This does not inspire confidence in the interviewer.
It is also helpful to show some awareness/knowledge of what the organisation does - there are these great things out there called websites. Have a look at them!
And finally...don't end the interview by saying "I want to drop my children at school, and live in the arse end of nowhere, so can't be in until 11.00, and I don't know what I am going to do on Wednesday as I don't want to leave the children with a babysitter..."
Because the question is then, do you want the bloody job or not?