Phone screen:

• Behavioural questions.
• Write a program to find the row which has least number of ones in a sorted matrix as 1's followed by 0's
• Write a program to de-serialize the preorder and inorder arrays into binary tree

Onsite:

Round 1: [HM]

• Behavioural questions.
• Questions about my project and architecture explanation in detailed.

Round 2: [Design Round]

• Behavioural questions.
• Given code and I was asked to review it.
• Design In-memory file system.

Round 3:

• A problem similar to this. I don;t remember exactly https://leetcode.com/problems/container-with-most-water
  Initially, I was not on the track. The interviewer gave some help. So, I was able to crack this.

• There is an array which has 1's and 0's . In each turn, the zeros which are on both the sides of 1's changed to 1's. In how many turns, the whole array changed to 1's?

Round 4: [OOD]

• There is a behavioural related question.
• Design ATM.

3 days later, I called HR. She said not selected. I was totally disappointed.