When interviewing for a software engineering position at Apple, the interviewer will ask various types of technical questions. These can range from very simple to very complex. Typically, the interviewer will start with simpler questions and progress to more complex ones. This indicates that they are gaining confidence in your ability to do the job and are willing to explore your background in more detail. Regardless of their complexity, technical questions should always be answered briefly and to the point. You should anticipate follow-up questions any time you provide an answer to the interviewer.
