Status: Software Engineer at Financial Services
Position: SDE at Facebook. Not sure about the level.
Location: New York, NY
Date: August 27, 2019
YOE: 7

Technical phone screen (45 minutes):

• https://leetcode.com/problems/bulb-switcher
• Variation of https://leetcode.com/problems/range-sum-query-2d-immutable

Onsite (5 rounds, 45 mins each):

Round 1: [Coding]

• https://leetcode.com/problems/add-binary
• https://leetcode.com/problems/binary-search-tree-iterator

Round 2: [Behavioral]

• How do you handle conflicts?
• What're you most proud of?
• 1 coding question at the end. It was least common ancestor for a tree.

Lunch (30 mins)

Round 3: [System Design]

• Design game feature in facebook. It was a chess game. It should have the following features
  1. Play with friends
  2. Undo move
  3. Scoreboard

Round 4: [Coding]

• I don't have premium but I think it is https://leetcode.com/problems/nested-list-weight-sum
• https://leetcode.com/problems/k-closest-points-to-origin

Round 5: [Coding]

• https://leetcode.com/problems/valid-palindrome-ii
• Variation of https://leetcode.com/problems/average-of-levels-in-binary-tree/. Mine was an N-ary tree, not a binary tree.

Result: Nothing yet