Question 6 of 307
Single answerYour weather app queries a database every 15 minutes to get the current temperature. The frontend is powered by Google App Engine and server millions of users. How should you design the frontend to respond to a database failure?
AIssue a command to restart the database servers.
✓BRetry the query with exponential backoff, up to a cap of 15 minutes.
CRetry the query every second until it comes back online to minimize staleness of data.
DReduce the query frequency to once every hour until the database comes back online.
✓
Correct Answer: B
Retry the query with exponential backoff, up to a cap of 15 minutes.
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Explanation
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