You will have to write a summary explaining how you will use your acquired skills to contribute to the aim of the particular project you want to work in. If you are a Master's or Undergrad student, mention the skills learned in your curriculum.

Tell me something about yourself. How did you hear about this position? Why do you want to work here? Why did you decide to apply for this position? What is your greatest strength? What are your strengths and weaknesses? What do you know about this company/organization?