Google Cloud Professional Cloud Developer Practice Test

Designing an effective row key in Cloud Bigtable is crucial for how data is accessed and for optimizing performance. In this case, choosing "Account_id_Event_timestamp" as a key is an apt approach for several reasons.

Combining both the Account_id and the Event_timestamp in the row key allows for efficient querying and data retrieval. The inclusion of the Account_id means that all related data for a particular account is easily grouped together, making it straightforward to fetch all entries corresponding to a specific account. This is particularly important when dealing with large datasets, as it minimizes the overhead of searching through unrelated data.

Moreover, appending the Event_timestamp to the Account_id provides a natural ordering of events in time. This is beneficial for operations where time-based queries or filtering is essential, such as retrieving the most recent events for an account or analyzing trends over time. It effectively utilizes Cloud Bigtable's capabilities for managing time-series data, where the sequence of events is as important as the events themselves.

Additionally, by formatting the key this way, you avoid potential key collisions that could arise if only the Account_id were used, especially in scenarios where multiple events may occur for the same account at different times. Therefore, this row key design supports both performance optimization and effective