Oracle OCI SMTS Interview Experience with 5 YOE System Design and Coding

YOE: 5 Applied on job portal and recruiter reached out to me.

Screening round: - Discussion on the current project (40 mins) - Problem solving : https://leetcode.com/problems/avoid-flood-in-the-city/d

YOE: 5 Applied on job portal and recruiter reached out to me.

Screening round: - Discussion on the current project (40 mins) - Problem solving : https://leetcode.com/problems/avoid-flood-in-the-city/description/ (30 mins) 4 Loops interviews were scheduled back to back after 2-3 days

Round 1 Problem solving 1. Remove Binary trees leaves step by step from left to right until the whole tree becomes empty -

Input: root = [1,2,3,4,5]

Output: [[4,5,3],[2],[1]] 2. https://leetcode.com/problems/remove-k-digits/description/

Round 2 Design a chat application similar to whatsapp/slack (1 hr) - 1B users, 10M DAU - Discussion on API Design, DB choices, guaranteed message delivery

Round 3 Hiring manager (45 mins) - Deep dive into the current project, work experience and some follow-ups. - Behavioural questions 1. Most critical bug 2. What have done to increase the productiivity of the team

Round 4 Problem solving and distributed systems (1hr 15 mins) 1. Some question on binary search similar to: https://leetcode.com/problems/koko-eating-bananas/description/ 2. Question on stack similar to finding the next greater element - Distributes system questions. - SQL vs NoSQL - DB indexing - Scalability at each layer