I applied for Senior iOS Developer at Razorpay. The first round was a telephonic interview in which questions were asked about projects worked on. The interviewer went deeply and tried to understand the projects. Another question was based on stock price buy/sell.

Introduce yourself and explain your project.

What kind of difficulties did you face in your project?

Question based on stack operations and find the optimized solution for it. Write a method to find the maximum value stored in a stack using push, pop, and peek methods. Complexity should not be high.

Memory management in iOS. What is a memory leak?

How to calculate the time spent on a view controller?

How to find the maximum profit of stock prices if a stock is purchased and sold on every day?