Table of Contents
Introduction
- Here, interviewer wants to know how does it feel like working with candidates on day to day basis.
- Company also want to judge candidate’s soft skills along with technical expertise.
- Does candidates open for critical feedback, responds well and adapt to new requirements easily ?
Clarification Questions (Scope)
- Repeat the problem statement
- Start with how the customer experience will looks like !
- Think out loud
- Reduce the scope of requirement for 45 mins discussion
- Get agreement from interviewer on reduced scope explicitly
Back of the envelope estimates (Metrics)
- We need to calculate transaction per seconds
- How many total users
- Daily active users
- How much is the overall storage will be required.
- Daily active user * Data size of a request (e.g. video, msg etc)
Functional Requirements
Non functional Requirements
1. Scalability
2. Availability
3. Reliability (Partition Tolerance)
- Do we have infinite budget or constraints ?
- Server distribution across geography, data centers (AZ), Rack etc.
4. Consistency
API’s
High Level Design
Low Level Design
Verification
- Verify non-functional requirements are met at the end
- Defend your design
- Always focus on trade offs.
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