First round : 1. If you have int array, how you will sum of that in objective c? 2. If you have string containing too many html tags, how you will remove that tags from string? Second round : 1. What is apns 2. why we share data on social site 3. what is gps 4. how to get distance between 2 location 5. knowledge in swift 6. what is delegate 7. diff between json and xml 8. what is storyboard 9. which controller has delegate.