Round 1 : System Design
Video view count in a distributed system.

Round 2 : Coding
1. Minimum steps for currency conversion. Next find the minimum conversion rate.
Similar to this - https://leetcode.com/discuss/interview-question/1335225/Find-best-exchange-rate-from-currency1-to-currency2/1009696
2. Minimum window substring. similar to below but in place of chars words were given.
https://leetcode.com/problems/minimum-window-substring/

Round 3 : Coding
1. https://leetcode.com/problems/powx-n/
2. https://leetcode.com/problems/nested-list-weight-sum/

Round 4: Coding
1. https://leetcode.com/problems/kth-largest-element-in-an-array/
2. minimum code for round trip.
Given 2 arrays. one for Departure and other for Return. only one trip. Need to find the minimum cost without using extra memory and without modifying input array
ex -
D[] = {8,3,6,10}
R[] = {10,9,5,8}

		output - 8 (3 + 5)
		

Round 5 : Behavioral
Basic questions about past experience.
Ambiguity, constructive feedback, best project etc.

Telephonic - https://leetcode.com/discuss/interview-experience/1494602/facebook-software-engineer-product-london-phone-screening-sept-21-resultpassed/1114409

Overall Enjoyed the experience.