Deploy code that must run whenever a new object is uploaded to a Cloud Storage bucket. Which deployment method should you use?

Deploying a Cloud Function triggered by a Cloud Storage bucket is the most direct and efficient solution. Cloud Functions are serverless, event-driven compute services that automatically execute code in response to events, such as new object uploads to a Cloud Storage bucket. This eliminates the need for managing servers and scales automatically. Using App Engine with Cloud Scheduler and Pub/Sub would be overly complex and less reactive, as Cloud Scheduler is for time-based events, not immediate object uploads. GKE with a CronJob is also for scheduled tasks and introduces significant operational overhead for a simple event-driven workload. Dataflow is designed for large-scale data processing pipelines, not for real-time, event-driven execution of code on individual object uploads.