Deshansh Garg on Instagram: "Interview Approach: Think pipeline → storage → distribution → recommendation. Answer Pointers: * Problem: Billions of posts daily → need scalable storage, fast delivery, and personalization. * Solution: 1. Upload & Storage → Reel is uploaded → stored in distributed object storage (like S3). 2. Transcoding → Multiple versions created (different resolutions, formats) for smooth playback. 3. CDN Delivery → Content cached at CDN edges globally for low-latency streaming.