One online round with a basic coding question.

Then there was one C-related online interview.

After that, they asked me to come to their office for a face-to-face interview. This included a system design interview, work-related discussions, and code debugging.

Finally, there was one interview with the director on basic coding.

Online Round 1:

• Simple postfix to infix conversion.
• Creating a BST and then calculating the total number of root-to-leaf paths with a sum equal to a given sum.

2nd Online Interview Round:

• BST, LCA, and in-order successor when the parent pointer is given.
• One more question was on LinkedList repeating node deletion.

Point to note: Everything needs to be done in C. Be comfortable with double pointers.

3rd F2F Interview:

• A long discussion on network system design, covering multicast, mapping, LRU cache, hashing, priority queue, and data packets.
• Then, an LCA of BST debugging round.
• The last round was a simple undo operation discussion, stack discussion, work, and some theory.