1st Round : Problem Solving Round (60 mins)

1) Level Order Traversal of tree in zig-zag manner.
2) Similar to two sum problem

2nd Round : LLD Round (60 mins)

1)Given a scenario where there can be multiple warehouses. Each warehouse can have some packages and some delivery guys associated with it. There will be an admin who will be responsible for assigning packages for delivery. At any time package could be in WAITING_FOR_DELIVERY,OUT_FOR_DELIVERY,CANCELLED and UP_FOR_RETRY state.

I was suppose to: Come up with entities, design database schema and explain how will we meet all requirements.
No code was required as such.

2)Discussion on caching techniques

3rd Round : HM Round (60 mins)

1)Explain most complex project
2) Again a LLD question and requirement was same

3. Why looking out for change