Practice Tests for AWS DEA

Ap Runner

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About this app

Kinesis Data Streams, Amazon Data Firehose, or Amazon MSK? All three look like they would work, but only one fits the requirements.
This app covers all four domains of the AWS Certified Data Engineer - Associate (DEA-C01) exam, at the real exam's weighting, five questions at a time.

DEA-C01 tests whether you can build and run data pipelines on AWS. Many candidates say they could narrow a question down to two options but could not decide between them. Glue job bookmarks, Athena partition projection, Redshift distribution keys and COPY, Lake Formation permissions: knowing the service names is not enough. Knowing each feature and its limits is what decides the result.

■ The same four domains, in the same proportions as the real exam

- Data Ingestion and Transformation (34%)
- Data Store Management (26%)
- Data Operations and Support (22%)
- Data Security and Governance (18%)

Ingestion and transformation alone is about a third of the exam. Your progress by domain maps directly onto the real exam, so your gaps show up as numbers.

■ What you get

[Built by a developer who holds all 12 AWS certifications]
Every question, option and explanation was written by a developer who has earned all 12 AWS certifications.

[Learn why the other options are wrong]
The most common complaint about practice tests is shallow explanations. Every one of the 300 questions here explains not only why the answer is right but why the most tempting wrong options are wrong. Firehose cannot replay data; partition projection removes the need to run a crawler. You learn to tell similar options apart.

[LEAST operational overhead and MOST cost-effective]
DEA is full of questions that ask for the option with the least operational overhead or the lowest cost. The wrong answers here are built the same way: they work, but they leave custom code or a cluster to manage.

[Aligned with exam guide v1.1 (December 2025)]
Every question is checked by script against the official in-scope and out-of-scope service lists, so out-of-scope services never appear in answers, distractors, or explanations. Topics added in v1.1 are covered, including Apache Iceberg, vector indexes (HNSW and IVF), LLM data processing with Amazon Bedrock, and Amazon SageMaker Unified Studio and SageMaker Catalog, which older study material does not cover.

[One set per train stop]
Five questions per set: a commute or a lunch break is enough.

[Progress that only goes up]
Every question you answer correctly is recorded once, whether you solved it in domain practice or Random Practice.

[Finish with exam-style practice]
Random Practice draws 5 to 10 questions from all four domains in the real exam's proportions.

[Works offline]
All questions are stored in the app. After download, no connection is needed.

[10 languages]
Questions, options, and explanations in English, Japanese, Spanish, German, French and more: 10 languages in all. Switch at any time and solve the same question in another language.

[No sign-up]
No account and no login. Install and start with question one.

■ Who it is for

- Anyone preparing for AWS Certified Data Engineer - Associate (DEA-C01)
- Anyone who studied with 2024-era material and wants to cover the v1.1 topics
- Engineers who build ETL or data platforms at work but have gaps outside their own services
- Anyone who wants to turn spare minutes into study time

■ Please note

This is an unofficial study app. AWS and Amazon Web Services are trademarks of Amazon.com, Inc. or its affiliates. Always check the official AWS website for the latest exam information and exam scope.

What’s new

Initial release.