Exam Professional Cloud Developer topic 1 question 103 discussion

I vote D. https://cloud.google.com/compute/docs/metadata/querying-metadata

D. When creating the Compute Engine instance, create a metadata item with a key of "DATABASE" and a value for the appropriate database connection string. In your application, query the metadata server for the "DATABASE" value, and use the value to connect to the appropriate database. This approach allows you to create a single golden image that is agnostic to the environment it is running in, while still allowing the appropriate database connection to be set at runtime. The metadata item is stored with the instance, so it can be read by your application at any time. This method allows you to avoid creating different images for different environments, and to use the same image for all environments. You can create metadata item by using the gcloud command line tool or the API to set metadata for a Compute Engine instance. Once set, the metadata can be easily accessed by your application via the instance metadata server.

D is the answer. https://cloud.google.com/compute/docs/metadata/setting-custom-metadata

D is correct

It should be D!

Thanks HotSpa27 it is indeed D Every VM stores its metadata on a metadata server. Use these instructions to query these metadata values. You can only query the metadata server programmatically from within a VM

D: https://cloud.google.com/compute/docs/metadata/overview