Your team is building an application for a global bank that will be used by millions of customers. You built a forecasting model that predicts customers' account balances 3 days in the future. Your team will use the results in a new feature that will notify users when their account balance is likely to drop below $25. How should you serve your predictions?
To notify users when their account balance is likely to drop below $25, you should build a notification system on Firebase and register each user with a user ID on the Firebase Cloud Messaging server. This system will send a notification when the model predicts that a user's account balance will drop below the threshold. Firebase Cloud Messaging is designed for large-scale notification delivery, making it a suitable choice for an application serving millions of users.
Should be D ! creating a Pub/Sub topic for each user is overkill
Yes, create a topic is overkill but not a NOTIFICATION SYSTEM. it's totally normal. Seriously, the step two involves "REGISTER EACH USER ....", how is this better than create a topic???? should be A and it's so obvious!
I think A is straight forward answer but in real life, customer also consider cost, so practically, app engine will be picked in this case..... because of the large user base
D is correct. Firebase is designed for exactly this sort of scenario. Also, it would not be possible to create millions of pubsub topics due to GCP quotas https://cloud.google.com/pubsub/quotas#quotas https://firebase.google.com/docs/cloud-messaging
Answer is D. FCM is designed for this type of notification sent to mobile and desktop apps.
Project limit is 10,000 topics, you could have multiple projects but that does not scale well. so D. https://cloud.google.com/pubsub/quotas#resource_limits
A doesn't work. There is a quota limit on the number of pub/sub topics you can create, also one Cloud function cannot subscribe to millions of topics. A doesn't scale at all.
D looks more relevant Notification messages: Simply display a message content, which is handled by the FCM SDK. Data Messages: Display a message with some set interactions
I think, D is the best answer
"Create a Pub/Sub topic for each user" this is crazy , we can not imagine a system with millions of pub/sub topics , so A,B wrong C also wrong
"Create a Pub/Sub topic for each user" xD
D- is more automated compared to A. A is overkill
Went with D
simple answer , use tools most mentioned during training . , cloud functions
Pub/Sub has a limit of 10,000 topics only and can't be increased https://cloud.google.com/pubsub/quotas#resource_limits.
D is correct. Firebase is used for applications.
D) Firebase