The interviewer is asking you about a process or methodology you use to develop mobile applications. During an interview for this role, you can anticipate that most questions will be operational or technical. These types of questions are best answered briefly and to the point. If you elaborate too much, you will not allow the interviewer to ask follow-up questions. Follow-up questions are important because they indicate an interviewer's interest in a specific topic and give you a clue as to what is important to the organization. You can use this information when structuring your responses to other questions.