I applied online.

It had multiple rounds as follows:

• Online round from home (coding + MCQ)
• Online round at some specified center (coding)
• Interview (logical and puzzles)
• Telephonic interview (CV-based)
• HR interview (no elimination, just for introduction purposes)
• Hackathon (in Bangalore office)
• Interview (in Bangalore office)
• Interview with CEO (in Bangalore office)

Round 2: Three graph-based questions, though I don't remember any of those.

Round 3: Two logical questions and their explanations:

• https://www.geeksforgeeks.org/puzzle-16-100-doors/
• https://www.youtube.com/watch?v=A6t7XJnYfXY

Round 4:

• The number of edges in a binary tree and the explanation.
• The maximum number of edges in a graph and the explanation.
• The best solution to reach from one node to another in a graph.

Round 6: Make a rotating cube along all the axes and give acceleration to rotate.

Round 7:

• Project-related: Image recognition without using ML (my project was based on a Convolutional Neural Network).
• Random questions on networking, like issues with HTTP, security using encryption, and key exchange in a compromised network (all this when networking was not in my CV).