Practice Exams | AWS Certified Data Engineer - Associate

Ace the AWS Certified Data Engineer Associate (DEA-C01) Exam with Realistic Practice Exams!

Are you preparing for the AWS Certified Data Engineer Associate (DEA-C01) certification? This comprehensive practice exams course is designed to give you the winning edge you need to succeed.

Developed by industry experts Stéphane Maarek and Abhishek Singh, who collectively possess experience passing over 20 AWS Certifications, these questions accurately mirror the style and difficulty of the real exam.

What You'll Get:

• Realistic Questions: All questions are written from scratch to reflect the actual exam content.
• Detailed Explanations: Each question includes in-depth explanations and "exam alerts" to clarify concepts and reasoning.
• AWS Documentation References: We've extensively referenced official AWS documentation to ensure you have a strong understanding of all tested domain areas.
• Unlimited Retakes: Practice as much as you need to build confidence.
• Instructor Support: Get assistance from experienced instructors if you have questions.
• Mobile-Friendly: Access the practice exams on the go with the Udemy app.
• 30-Day Money-Back Guarantee: We're confident you'll love this course!

Master Key DEA-C01 Exam Topics:

This course covers essential topics for the AWS Certified Data Engineer Associate exam, including:

• Amazon Athena: Optimize query performance on data in Amazon S3.
• AWS Glue: Understand and utilize AWS Glue Data Catalog for metadata management.
• Amazon S3: Efficiently store and manage data in Amazon S3.
• Partitioning Strategies: Learn how to effectively partition data for improved query performance.
• AWS Glue Partition Index: Leverage partition indexing to accelerate Athena queries.
• Athena Partition Projection: Utilize partition projection to optimize query processing of highly partitioned tables.

Example Question:

A data engineer is experiencing slow query performance when running Amazon Athena queries against Amazon S3 datasets managed by AWS Glue Data Catalog. The root cause is identified as an excessive number of partitions in the S3 bucket.

What are two possible approaches to improve query efficiency?

Select the two correct options:

• Transform the data in each partition to Apache ORC format.
• Compress the files in gzip format to improve query performance against the partitions.
• Perform bucketing on the data in each partition.
• Set up an AWS Glue partition index and leverage partition filtering via the GetPartitions call.
• Set up Athena partition projection based on the S3 bucket prefix.

Correct Answers: 4, 5.

Explanation:

• Set up an AWS Glue partition index: A partition index allows Athena to efficiently filter partitions based on partition keys, reducing the amount of data scanned.
• Set up Athena partition projection: Partition projection calculates partition information on the fly, eliminating the need to retrieve it from the metastore, which can significantly speed up queries.

Incorrect Options Explained:

• Transform the data in each partition to Apache ORC format: While ORC is efficient, it doesn't address the core issue of excessive partitions.
• Compress the files in gzip format: Compression reduces data size and improves query performance, but doesn't resolve the problem of too many partitions.
• Perform bucketing on the data in each partition: Bucketing is a different concept than partitioning and doesn't directly address the issue of excessive partitions.

About Your Instructors:

Stéphane Maarek is a passionate cloud computing expert with over 2.5 million students and 500,000+ reviews. He specializes in helping students achieve AWS certifications.

Abhishek Singh joins Stéphane as a co-instructor, bringing his expertise to create the best practice exams for the AWS Certified Data Engineer Associate exam.

Ready to confidently pass your DEA-C01 exam? Enroll now and start practicing! We're confident these practice exams will help you achieve your goal.