Meta | E5 | London [Reject]

I interviewed for Meta Onsite for E5 Android role.

Coding Round 1 -

1. Kth Largest Element in an Array
2. Basic Calculator II

Coding Round 2 -

1. String to Integer (atoi)
2. Given a list of iterator of integers. Write a class with next() and hasNext() methods. E.g. [2,5,1,0] [1] [9,2,10,4,11] next() should return integer from each iterator one by one.

Output (by calling repeated next())- 2, 1, 9, 5, 2, 1, 10, 0, 4, 11

Android System Design -

Design Push Notification Android Client.

Think of a mobile having facebook, whatsapp, instagram and messenger app. There is no push notification service available.

Behavioural -

Standard questions on conflict resolution.

Feedback - Reject.

As per recruiter, I didn't performed at E5 level in Behavioral. I made some false assumptions in System Design. Some issue in second coding round also in regard to second question.