**Round-1 Coding**

Write a custom iterator which parses a delimiter and creates strings using the same in c++

**Round-2 Multithreading**

Design a concurrent queue, where multiple producers, multiple consumers can read/write from it

**Round-3 System Design**

Design a birthday email sending service. Drill down deeper and deeper to deduplication(sending duplicate mails), fault tolerance, timezone mismatch issues

Round-1 CodingWrite a custom iterator which parses a delimiter and creates strings using the same in c++Round-2 MultithreadingDesign a concurrent queue, where multiple producers, multiple consumers can read/write from itRound-3 System DesignDesign a

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