Google Cloud Certified Associate Cloud Engineer Practice

A sparsely populated database.

1. BigQuery

2. Datastore

3. Bigtable

4. Firestore

The correct answer is: Bigtable

A sparsely populated database is one that has a significant amount of empty space or unoccupied data points compared to the total amount of available data points. Bigtable is particularly well-suited for handling sparsely populated data because it is designed to scale horizontally and can efficiently manage large volumes of data with a sparse distribution. Bigtable organizes data in tables with rows and columns, where each row can contain very different amounts of data, making it efficient for storing data that may not have a consistent volume or may only have information for certain rows. This flexibility allows it to accommodate datasets where many entries may be empty or have only occasional values. Additionally, Bigtable is optimized for read and write access patterns, which is beneficial in scenarios with sparse data where certain records may be accessed more frequently than others. Other options like BigQuery, Datastore, and Firestore have different characteristics and design intentions. For instance, BigQuery is designed primarily for analytical queries and handling large-scale aggregations, while Datastore and Firestore are NoSQL document database services that are more suited for structured data with clear applications. They provide different capabilities and levels of scalability that may not align as closely with the optimization needed for sparsely populated datasets like those managed in Bigtable.