*<ins>Note</ins>: Kindly upvote if you find the post helpful. Thanks for reading!*\n\nHi Everyone, last week, I had my virtual onsite with Facebook for the Sr Software Engineer (E5) position. I was asked following questions:\n\n### Phone Screen\nInterviewer asked two coding questions. It was a 45 minute round.\n* [1650. Lowest Common Ancestor of a Binary Tree III](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree-iii/) - Only node1 and node2 are given as input. Each node also has a pointer to its parent. \n* [1570. Dot Product of Two Sparse Vectors](https://leetcode.com/problems/dot-product-of-two-sparse-vectors/)\n\nMy approach for answering Coding Questions:\n1. Understand the problem. Ask clarifying questions.\n1. Verbally explain the solution for the problem.\n1. Also, provide the expected Time & Space complexity of the solution.\n1. Once the interviewer is satisfied with the verbal solution, quickly implement it and then do a dry run with a few test cases covering corner cases.\n1. Explain the Time & Space complexity of the written solution.\n\n---\n\n### Virtual Onsite\n2 Coding Rounds (Ninja) + 1 System Design (Pirate) + 1 Behavioural Round (Jedi). Each round was of 45 minutes.\n\n<ins>**Coding Round 1:**</ins>\n* [953. Verifying an Alien Dictionary](https://leetcode.com/problems/verifying-an-alien-dictionary/)\n* [215. Kth Largest Element in an Array](https://leetcode.com/problems/kth-largest-element-in-an-array/)\n\n<ins>**System Design Round:**</ins>\nI was asked to [Design Privacy Settings at Facebook](https://bit.ly/3GvjIw4). I spent around 40 mins on this question, and then in the remaining 5 mins, I asked questions to learn more about Facebook Culture.\n\n<ins>**Coding Round 2:**</ins>\n* [88. Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array/)\n* [426. Convert Binary Search Tree to Sorted Doubly Linked List](https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list/)\n\n<ins>**Behaviour Round:**</ins>\nThe interviewer started the round by asking about me. I described my current project and significant accomplishments. He then asked if I ever had to manage conflicting priorities. He also asked me if I ever received constructive feedback from a colleague. For each question, I provided a supporting anecdote from my experience and made sure my answers were in-line with Facebook\'s mission and core values. The interviewer also asked one Coding Question - [543. Diameter of Binary Tree](https://leetcode.com/problems/diameter-of-binary-tree/).\n\n---\n\nOverall, it was a great experience. Two days after my virtual onsite, I got a call from the recruiter that the feedback from my interviewers is good, and they are still waiting for the hiring committee to make the final decision.\n\nBest of luck everyone with your upcoming interviews :)

Note: Kindly upvote if you find the post helpful. Thanks for reading!\n\nHi Everyone, last week, I had my virtual onsite with Facebook for the Sr Software Engin