Free AWS Certified Data Engineer - Associate DEA-C01 Exam Questions and Answers
AWS Certified Data Engineer - Associate DEA-C01 is exam DEA-C01, part of AWS Certification from Amazon Web Services. AWS codes take the form ROLE-Cnn, where the letters name the role and tier and the C-number is the syllabus revision — so SAA-C03 is the third revision of Solutions Architect Associate. Exams are multiple choice and multiple response through Pearson VUE, scored on a 100 to 1000 scale, with the pass mark set by tier: 700 Foundational, 720 Associate, 750 Professional and Specialty.
Candidates comparing DEA-C01 exam dumps, ExamTopics and other DEA-C01 practice tests use this page for the answers and explanations behind each question. Download the free DEA-C01 PDF, then sit the timed DEA-C01 exam simulation before booking with Amazon.
Last updated: October 2, 2026
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- DEA-C01
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Question #6
A company uses Amazon S3 to store semi-structured data in a transactional data lake. Some of the data files are small, but other data files are tens of terabytes. A data engineer must perform a change data capture (CDC) operation to identify changed data from the data source. The data source sends a full snapshot as a JSON file every day and ingests the changed data into the data lake. Which solution will capture the changed data MOST cost-effectively?
Correct answer: C
Explanation
An open source data lake format, such as Apache Parquet, Apache ORC, or Delta Lake, is a cost-effective way to perform a change data capture (CDC) operation on semi-structured data stored in Amazon S3. An open source data lake format allows you to query data directly from S3 using standard SQL, without the need to move or copy data to another service. An open source data lake format also supports schema evolution, meaning it can handle changes in the data structure over time. An open source data lake format also supports upserts, meaning it can insert new data and update existing data in the same operation, using a merge command. This way, you can efficiently capture the changes from the data source and apply them to the S3 data lake, without duplicating or losing any data. The other options are not as cost-effective as using an open source data lake format, as they involve additional steps or costs. Option A requires you to create and maintain an AWS Lambda function, which can be complex and error-prone. AWS Lambda also has some limits on the execution time, memory, and concurrency, which can affect the performance and reliability of the CDC operation. Option B and D require you to ingest the data into a relational database service, such as Amazon RDS or Amazon Aurora, which can be expensive and unnecessary for semi-structured data. AWS Database Migration Service (AWS DMS) can write the changed data to the data lake, but it alsocharges you for the data replication and transfer. Additionally, AWS DMS does not support JSON as a source data type, so you would need to convert the data to a supported format before using AWS DMS. References: • What is a data lake? • Choosing a data format for your data lake • Using the MERGE INTO command in Delta Lake • [AWS Lambda quotas] • [AWS Database Migration Service quotas]
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Discussion
Explain your reasoning, not just the letterBrowse the free questions by topic
More DEA-C01 questions
- Question 1A data engineer needs to join data from multiple sources to perform a one-time analysis job. The data is stored in…
- Question 2A company stores datasets in JSON format and .csv format in an Amazon S3 bucket. The company has Amazon RDS for…
- Question 3A company stores petabytes of data in thousands of Amazon S3 buckets in the S3 Standard storage class. The data…
- Question 4A data engineer is configuring Amazon SageMaker Studio to use AWS Glue interactive sessions to prepare data for machine…
- Question 5A company's data engineer needs to optimize the performance of table SQL queries. The company stores data in an Amazon…
All AWS Certified Data Engineer - Associate DEA-C01 practice questions →
Other Amazon certifications
- AWS Certified Solutions Architect - Associate SAA-C03 (opens in a new tab)
- AWS Certified Cloud Practitioner CLF-C02 (opens in a new tab)
- AWS Certified Developer - Associate DVA-C02 (opens in a new tab)
- SCS-C03: AWS Certified Security - Specialty (opens in a new tab)
- SOA-C03: AWS Certified CloudOps Engineer - Associate (opens in a new tab)
- AWS Certified Solutions Architect - Professional SAP-C02: AWS Certified Solutions Architect -Professional SAP-C02 (opens in a new tab)
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FAQ
Learn More: https://aws.amazon.com/certification/
- Q1: What is the AWS Certified Data Engineer - Associate DEA-C01 exam?
- A: AWS Certified Data Engineer - Associate DEA-C01 is a Amazon certification exam. Judging by the questions in our bank, it concentrates on amazon, engineer, redshift, athena and bucket.
- Q2: What topics does the AWS Certified Data Engineer - Associate DEA-C01 exam cover?
- A: Questions in our AWS Certified Data Engineer - Associate DEA-C01 bank cluster around amazon, engineer, redshift, athena, bucket, overhead, apache and glue. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for AWS Certified Data Engineer - Associate DEA-C01?
- A: Work through the AWS Certified Data Engineer - Associate DEA-C01 practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real AWS Certified Data Engineer - Associate DEA-C01 exam questions?
- A: They are drawn from officially released past questions and from community members who have sat AWS Certified Data Engineer - Associate DEA-C01. Answers are verified and updated weekly.
- Q5: Where do I register for the AWS Certified Data Engineer - Associate DEA-C01 exam?
- A: Register through Amazon directly at https://aws.amazon.com/certification/. Exampractice is not affiliated with Amazon and does not administer the exam.
- Q6: Is there a free AWS Certified Data Engineer - Associate DEA-C01 sample?
- A: Yes. Every AWS Certified Data Engineer - Associate DEA-C01 page shows a free sample of real questions. Upgrading opens the full bank and the practice test.
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- A: Amazon offers various certification paths, including Foundational Level (AWS Certified Cloud Practitioner), Associate Level (AWS Certified Solutions Architect, AWS Certified Developer, AWS Certified SysOps Administrator), Professional Level (AWS Certified Solutions Architect – Professional, AWS Certified DevOps Engineer – Professional), and Specialty Certifications (Security, Big Data, Advanced Networking, and more).
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