Quick Answer
The answer is the Amazon Redshift COPY command. This is the correct choice because the COPY command is specifically designed for bulk loading JSON files from S3 to Redshift, leveraging Redshift’s massively parallel processing (MPP) architecture to automatically distribute and ingest data across all compute nodes. For 100 MB files arriving every 5 minutes, COPY provides the most direct and performant approach, handling JSON auto-mapping and schema inference without intermediate transformations. On the AWS Certified Data Engineer Associate DEA-C01 exam, this scenario tests your understanding of Redshift’s native ingestion methods versus alternatives like AWS Glue or Kinesis Firehose, which add unnecessary overhead for batch loads. A common trap is choosing a streaming service for periodic file arrivals, but COPY excels at bulk, scheduled loads. Memory tip: think “COPY for bulk, STREAM for real-time”—when files land in S3 on a schedule, COPY is the fastest path to Redshift.
This DEA-C01 practice question tests your understanding of data ingestion and transformation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A data engineer is building a pipeline to ingest JSON files from Amazon S3 into Amazon Redshift. The files are 100 MB each and arrive every 5 minutes. Which service is BEST suited for this ingestion?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
AWS Glue ETL job
Why wrong: Glue is more suited for complex transformations; for simple loading, COPY is simpler.
Amazon Redshift COPY command
COPY is optimized for loading large data from S3.
AWS Lambda with Redshift Data API
Why wrong: Lambda has time limits and is not efficient for large files.
Amazon Kinesis Data Firehose with Redshift destination
Why wrong: Firehose is for streaming data, not batch files.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Amazon Redshift COPY command
Amazon Redshift COPY command efficiently loads large files from S3 in parallel. It is the most direct and performant approach for bulk loading into Redshift.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS Glue ETL job
Why it's wrong here
Glue is more suited for complex transformations; for simple loading, COPY is simpler.
Amazon Redshift COPY command
Why this is correct
COPY is optimized for loading large data from S3.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
AWS Lambda with Redshift Data API
Why it's wrong here
Lambda has time limits and is not efficient for large files.
Amazon Kinesis Data Firehose with Redshift destination
Why it's wrong here
Firehose is for streaming data, not batch files.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DEA-C01 NAT questions on configuration and troubleshooting.
Data Ingestion and Transformation — study guide chapter
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FAQ
Data Ingestion and Transformation — This question tests Data Ingestion and Transformation — Static NAT maps one inside address to one outside address..
The correct answer is: Amazon Redshift COPY command — Amazon Redshift COPY command efficiently loads large files from S3 in parallel. It is the most direct and performant approach for bulk loading into Redshift.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DEA-C01 NAT questions on configuration and troubleshooting.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This DEA-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DEA-C01 exam.
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