DAS-C01 · Question #78
DAS-C01 Question #78: Real Exam Question with Answer & Explanation
Sign in or unlock DAS-C01 to reveal the answer and full explanation for question #78. The question stem and answer options stay visible for context.
Question
An airline has been collecting metrics on flight activities for analytics. A recently completed proof of concept demonstrates how the company provides insights to data analysts to improve on-time departures. The proof of concept used objects in Amazon S3, which contained the metrics in .csv format, and used Amazon Athena for querying the data. As the amount of data increases, the data analyst wants to optimize the storage solution to improve query performance. Which options should the data analyst use to improve performance as the data lake grows? (Choose three.)
Options
- AAdd a randomized string to the beginning of the keys in S3 to get more throughput across
- BUse an S3 bucket in the same account as Athena.
- CCompress the objects to reduce the data transfer I/O.
- DUse an S3 bucket in the same Region as Athena.
- EPreprocess the .csv data to JSON to reduce I/O by fetching only the document keys needed by
- FPreprocess the .csv data to Apache Parquet to reduce I/O by fetching only the data blocks
Unlock DAS-C01 to see the answer
You've previewed enough free DAS-C01 questions. Unlock DAS-C01 for full answers, explanations, the timed quiz mode, progress tracking, and the master PDF. Question stem and options stay visible so you can still see what's on the exam.