Architecture & LLD Preview
Meeting Room Scheduler
Book meeting rooms across time slots, detect conflicts, and suggest the next free slot.
TimeSlot value object with an overlaps() predicate, per-room start-sorted meetings, atomic conflict-checked booking, capacity checks, and a linear gap-scan that returns the earliest free slot of a given duration.
Core Design Challenge
"Design a meeting room scheduler — book rooms across intra-day time slots, detect conflicts, respect capacity, and suggest the earliest free slot."
What You'll Learn:
- ✦Preventing double-booking using concurrency control
- ✦Modeling reservation states (Pending, Reserved, Paid, Cancelled)
- ✦Designing database schemas (User, Show, Seat, Booking)
- ✦Scaling seat allocation under high concurrent user load