Practice Test 1 | Google Cloud Certified Professional Data Engineer | Dumps | Mock Test
A pharmaceutical factory has over 100,000 different sensors generating JSON-format events every 10 seconds to be collected. You need to gather the event data for sensor & time series analysis.
Which database is best used to collect event data?
A. Google Storage
B. Cloud Spanner
C. BigTable
D. Datastore
Answer: C.
Cloud BigTable is a petabyte-scale, fully managed NoSQL database service for large analytical and operational workloads.
Answer A is incorrect: Storing data to Google Storage needs further processing to be eligible for time- series analysis using tools such as Apache Hive or Presto.
Answer B is incorrect: Cloud Spanner is a relational database service. It is not recommended for JSON- format data that may have changing structure.
Answer D is incorrect: Datastore can be a potential choice since it’s a NoSQL database. The issue is, Datastore is not built for storing and reading huge data volumes as in this scenario. Datastore is deisgned for web applications of small scale.
Source(s):
BigTable vs. Datastore: https://stackoverflow.com/questions/30085326/google-cloud-bigtable-vs- google-cloud-datastore
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