Answer By Gemini

The correct answer is D. Install the cloud-datastore-emulator component using the gcloud components install command.

Here's why:

• Local Datastore Emulator: To test your application locally against Cloud Datastore without interacting with the actual cloud service, you need to use the Datastore Emulator. This emulator provides a local environment that mimics the Cloud Datastore API.

• gcloud components: The gcloud components command is the correct way to manage the components of the Cloud SDK. The Datastore Emulator is installed as a component.

• Why other options are incorrect:

  • A. Exporting data: Exporting data is for backing up or migrating data, not for local development.
  • B. Creating indexes: While indexes are important for Datastore, you would define them in your application code or configuration files. You don't create them directly using gcloud datastore indexes create for the emulator. The emulator might automatically create indexes based on your queries.
  • C. apt-get install: The Cloud SDK and its components are managed through the gcloud command-line tool, not directly through apt-get. While the SDK itself might have been installed via apt, components are managed via gcloud.