Simulate the real AWS Certified Data Engineer Associate DEA-C01 exam with full-length timed sessions. Questions drawn proportionally from all 4 official blueprint domains — the same mix you'll face on test day.
Simulate real exam conditions
For the most realistic DEA-C01 simulation, start a 60 or 120-question session, put away all notes, set a timer matching the real exam duration (130 minutes), and commit to each answer before moving forward. This trains the time management and decision-making skills the real exam tests.
This free DEA-C01 mock exam uses the same question distribution as the real AWS Certified Data Engineer Associate DEA-C01 exam. Each session draws questions proportionally from all 4 official blueprint domains published by Amazon Web Services, so the topic mix you see accurately reflects what you'll face on test day.
DEA-C01 Domain Distribution
Data Ingestion and Transformation
Data Operations and Support
Data Security and Governance
Data Store Management
Every question is written by certified engineers against the 2026 DEA-C01 exam objectives. These are original practice questions — not dumps — so you build real understanding rather than memorising answers.
Both the mock exam and practice test use the same question bank. The difference is in how you use them — and when to use each during your DEA-C01 study plan.
Practice test — for learning
Use the DEA-C01 practice test when you are studying a domain. Answer questions, read every explanation immediately, and build understanding. Do 10–30 questions per domain per session. This is your primary study tool for the first 4 weeks.
Go to practice test →Mock exam — for simulation
Use the DEA-C01 mock exam in the final 1–2 weeks before your test date. Complete a 60 or 120-question session without stopping, manage your time, then review all results at the end. This builds exam-day stamina and surfaces final weak spots.
Start 120-question mock →Try these sample questions from the mock exam bank. Commit to an answer before revealing the explanation.
A data engineer needs to ingest streaming data from an IoT fleet into Amazon S3 for near-real-time analytics. The data volume is approximately 5 GB per hour, and each event is less than 1 KB. Which AWS service should be used as the ingestion endpoint?
Select an answer to reveal the explanation
A company uses AWS Glue ETL jobs to transform data from Amazon S3 to Amazon Redshift. The job reads JSON files, applies schema mapping, and writes to a Redshift table. Recently, the job started failing with memory errors. The data volume has increased tenfold. Which approach should a data engineer take to resolve this issue with minimal code changes?
Select an answer to reveal the explanation
A financial services company processes real-time stock trade data. They use Amazon Kinesis Data Streams with a shard count of 5, each shard receiving about 500 records per second. The consumer application uses the Kinesis Client Library (KCL) with DynamoDB for checkpointing. Lately, some records are being processed multiple times. What is the most likely cause?
Select an answer to reveal the explanation
A data engineering team needs to transform CSV files stored in Amazon S3 into Parquet format using AWS Glue. The files are partitioned by date and are updated hourly. Which AWS Glue feature should be used to automatically detect the schema and partition structure?
Select an answer to reveal the explanation
An e-commerce company ingests clickstream data from their website into Amazon S3. The data is in JSON format, and each file is about 10 MB. They need to transform the data into a columnar format for analytics and load it into Amazon Redshift nightly. The transformation should be cost-effective and require minimal operational overhead. Which approach meets these requirements?
Select an answer to reveal the explanation
A data engineer notices that an AWS Glue job processing data from an Amazon S3 bucket frequently fails with 'OutOfMemoryError'. The job reads CSV files, applies transformations, and writes Parquet to another S3 bucket. The job has 10 workers of type G.1X. Which change is MOST likely to resolve the issue?
Select an answer to reveal the explanation
A company uses Amazon Kinesis Data Streams to ingest clickstream data. The data is consumed by a custom consumer application that writes to Amazon S3 every 5 minutes. The consumer is falling behind and processing lag is increasing. Which action is MOST effective to reduce the lag?
Select an answer to reveal the explanation
A data team runs a daily AWS Glue ETL job that processes data from an Amazon Redshift cluster and writes results to Amazon S3. The job completes successfully but takes 2 hours longer than expected. The job uses the JDBC connection to Redshift. The Redshift cluster is 4 dc2.large nodes. The Glue job has 10 workers of type G.1X. Which change would MOST likely reduce the job duration?
Select an answer to reveal the explanation
A data engineer needs to ensure that an Amazon S3 bucket used for sensitive data is encrypted at rest using a customer-managed AWS KMS key. The bucket policy must enforce encryption for all PUT requests. Which policy statement should be added to the bucket policy?
Select an answer to reveal the explanation
A company uses AWS Glue to process sensitive data stored in Amazon S3. The security team requires that all data in transit between AWS Glue and S3 be encrypted. Which configuration should be used to meet this requirement?
Select an answer to reveal the explanation
A company has an Amazon RDS for MySQL DB instance with read replicas. The primary DB instance fails. What is the correct procedure to promote a read replica to become the new primary?
Select an answer to reveal the explanation
A data engineering team uses Amazon Redshift for analytics. They notice that queries on a large fact table are slow. The table is distributed using DISTSTYLE ALL. Which design change would most likely improve query performance?
Select an answer to reveal the explanation
A company uses Amazon DynamoDB for a gaming application. They need to store player session data that expires after 24 hours. Which DynamoDB feature should they use to automatically delete expired items?
Select an answer to reveal the explanation
Answer all 13 questions to see your domain score breakdown
Sitting the DEA-C01 under real exam conditions is a skill in itself. Candidates who underperform often do so not because of knowledge gaps, but because of poor time management or test anxiety. Use your final mock exam sessions to address both.
The DEA-C01 exam lasts 130 minutes. Do not spend more than 90 seconds on any single question on the first pass. Flag difficult ones and return to them after completing the rest.
On every question, immediately eliminate obviously wrong choices. Even if you are unsure between two options, narrowing to two doubles your odds. Most DEA-C01 distractors contain a subtle error — re-read the scenario constraint before committing to the answer that sounds most familiar.
Amazon Web Services writes many DEA-C01 questions as realistic scenarios. Read the final sentence first — it tells you what is being asked. Then re-read the scenario with the question in mind to avoid wasting time on irrelevant details.
The real DEA-C01 is a mental marathon lasting 130 minutes. In the week before your exam, complete at least two full timed mock sessions on separate days to build concentration stamina. If you cannot stay focused for 130 minutes in practice, you will struggle on exam day.
Questions
65
On the real exam
Time limit
130 min
2 min per question
Passing score
720/1000
Scaled scoring
The DEA-C01 uses scaled scoring — your raw percentage correct is converted to a score out of 1000. Consistently scoring above 80% on mock exams puts you well above the 720/1000 threshold, giving you a buffer for any unexpected question types on the real exam.
Yes. Courseiva provides free DEA-C01 mock exam questions across all official exam domains. The platform includes timed simulation, per-domain score breakdown, missed-question review, and readiness tracking. No account required — free forever, supported by advertising.
The practice test is optimised for learning: you see explanations after each question immediately. The mock exam is optimised for simulation: you answer all questions under time pressure and review at the end. Use practice tests for studying and mock exams for benchmarking.
Aim for consistent scores of 80% or above on full-length DEA-C01 mock exams before booking your test date. The official passing score of 720/1000 corresponds to roughly 72–75% correct answers, so an 80% buffer accounts for difficulty variation and question styles on the real exam.
Most candidates who pass DEA-C01 on their first attempt complete 3–5 full-length mock exams in the two weeks before their test. This is enough to identify final weak spots, build stamina, and verify readiness without over-stressing or running out of fresh questions.
No — all Courseiva questions are original, written by certified engineers against public Amazon Web Services exam blueprints. Exam dumps are memorised real exam questions shared illegally. Using dumps violates your Amazon Web Services certification agreement and can result in your certification being revoked. Our questions make you genuinely competent, not just test-day lucky.
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