cache with time limit core interview pattern Pattern
1 problems
Pattern pages help build reusable solving frames. Identify signals first, then explain state, transition, and edge handling.
Recognition Signals
- Can the candidate efficiently handle key expiration using timers?
- Is the candidate able to optimize for both space and time complexity while managing cache expiration?
Solve Flow
- 1. Define the active state/window.
- 2. Update state while preserving invariants.
- 3. Validate with edge-heavy examples.
Common Misses
- Not handling key overwrites properly and not resetting the expiration timer.