1. Why is PR auc better than ROC auc for imbalanced classification? 2. How is scaling done on train and test data 3. Case study of designing insta story recommender 4. What is expectation maximization 5. Business case of designing a washing machine for blind folks 6. How to measure model / data drift in real setting
1. binary search in rotated sorted array. 2. rain water trapping.
Q: Tell me about yourself
What type of experience that matched the job.
Design a system which will have 3 classes and 10+ methods with all the getters & setters etc.
### Interview Rounds - **Round 0 (Screening)** - System design: Scenario based questions - Choose eventual or strong consistency for following scenarios - Analytical service aggregating metrics - Transactional service handling payments - Load balancer of google docs assigns server based on the hash of document id. What will happen if a new server is added or removed from the LB. How to prevent it ? - How to show friend count on each FB post. User entity and user - friend relation exists in DB schema. For low scale vs high scale. Cache update policy etc. - Explain networking in a group chat application. How to handle failure scenarios. - LC style coding - Find if two nodes of a nary tree with multiple roots have a common ancestor - Tree was input in the form `[[, ],[],…]` - **Round 1 (DSA)** - Explain and Implement logic for adding two strings - Format the output with commas and it should work with formatted inputs - Extend it to use in implementing fibonacci sequence for large n - **Round 2 (HLD)** - Design Shazam where matching algorithm is abstracted - Create 10-15 snapshots of a song - Identify song from the audio snippets uploaded by users - **Round 3 (LLD)** - Design Automated Parking Garage - API Design | Class Design | Schema Design - **Round 4 (Behavioural)** - Technical fit based on behavioural questions - Conflict Management | Product Exposure | Peer Grooming | Work Impact Round 2, 3 and 4 were taken by engineers from their Germany office. I had trouble communicating with the manager in round 4 who was from Ukraine. It was my fault, I could understand him but my pace of speech was fast for him.
There was no interview schedule because Red Hat auto-rejected my application, which is probably related to the fact that they use Workday, which is not an ADA-accessible platform.
In a binary tree given a target element, print the immediate infected items.
Aptitude, problem solving and system design
Design youtube search with autocomplete Infinite scroll Mostly on JS hooks concepts
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