The answer is AWS Step Functions and Amazon Managed Workflows for Apache Airflow (MWAA). These two services are correct because they are purpose-built for scheduling and orchestrating data pipelines that involve multiple steps like data extraction, transformation, and loading, coordinating dependencies and retries across services such as Lambda, Glue, or S3. On the AWS Certified Machine Learning Specialty MLS-C01 exam, this question tests your ability to distinguish between compute, ETL, and orchestration services—a common trap is confusing AWS Glue (an ETL engine) or Lambda (a compute unit) with orchestrators, or mistaking CloudWatch Events for complex workflow management. Remember that orchestration requires state management and sequencing, not just event triggers. A helpful memory tip: think of Step Functions as a visual state machine for serverless workflows, and MWAA as a managed Apache Airflow environment—both are designed to “conduct the orchestra” of pipeline steps, while Glue and Lambda are the musicians playing their parts.
MLS-C01 Data Engineering Practice Question
This MLS-C01 practice question tests your understanding of data engineering. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which TWO AWS services can be used to schedule and orchestrate a data pipeline that includes multiple steps such as data extraction, transformation, and loading? (Choose 2.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon Managed Workflows for Apache Airflow (MWAA)
AWS Step Functions is a serverless orchestration service that can coordinate multiple AWS services into workflows. Amazon Managed Workflows for Apache Airflow (MWAA) is a managed version of Apache Airflow for orchestrating pipelines. Option A is wrong because Lambda is a compute service, not an orchestrator. Option C is wrong because CloudWatch Events is for event scheduling, not complex orchestration. Option D is wrong because Glue is an ETL service, not an orchestrator, though it can be part of a pipeline.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
AWS Lambda
Why it's wrong here
Lambda is a compute service, not designed for multi-step orchestration.
✗
AWS Glue
Why it's wrong here
Glue is for ETL, not orchestration, though it can be a step in a pipeline.
✓
Amazon Managed Workflows for Apache Airflow (MWAA)
Why this is correct
MWAA is a managed orchestration service for data pipelines.
Related concept
Static NAT maps one inside address to one outside address.
Static NAT maps one inside address to one outside address.
✗
Amazon CloudWatch Events
Why it's wrong here
CloudWatch Events triggers based on time or events, not complex workflows.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
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
How to think about this question
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.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
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
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
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 MLS-C01 NAT questions on configuration and troubleshooting.
Data Engineering — This question tests Data Engineering — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Amazon Managed Workflows for Apache Airflow (MWAA) — AWS Step Functions is a serverless orchestration service that can coordinate multiple AWS services into workflows. Amazon Managed Workflows for Apache Airflow (MWAA) is a managed version of Apache Airflow for orchestrating pipelines. Option A is wrong because Lambda is a compute service, not an orchestrator. Option C is wrong because CloudWatch Events is for event scheduling, not complex orchestration. Option D is wrong because Glue is an ETL service, not an orchestrator, though it can be part of a pipeline.
What should I do if I get this MLS-C01 question wrong?
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 MLS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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