I had applied on the company's website and received an email from HR to schedule a phone interview (technical).

The phone interview was resume-based, and I received an email for on-site interviews the next day.

I had three on-site interviews the same day:

• The first was with the same person who conducted the phone interview. He asked questions on C# and web services, all aimed at what I had written on my resume.
• The second interview was somewhat technical, with questions like "What is OOP?" and "Why OOP?" Then, they asked me to draw an object model of one of my projects from my resume and explain the relationships between different objects.
• The third was HR-related, where they asked about my salary expectations and what motivated me to apply for the position.

I received an acceptance email two days after the on-site interviews.

How will you approach it if you are given a functional module that is dependent on other modules to work and it fails?

How will you determine/find the failing dependent module quickly?