DEA-C01 Data Operations and Support Practice Question
A data engineer needs to monitor the number of records processed by an AWS Glue ETL job. Which CloudWatch metric should the engineer use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
glue.driver.aggregate.numRecords
Glue emits a 'glue.driver.aggregate.numRecords' metric for the number of records processed. Option A is wrong because 'glue.driver.aggregate.elapsedTime' is for time. Option C is wrong because 'glue.driver.aggregate.bytesRead' is for bytes. Option D is wrong because 'glue.driver.aggregate.recordsRead' is not a standard metric.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
glue.driver.aggregate.elapsedTime
Why it's wrong here
This is for time elapsed, not record count.
- ✓
glue.driver.aggregate.numRecords
Why this is correct
This metric tracks the number of records processed.
- ✗
glue.driver.aggregate.bytesRead
Why it's wrong here
This is for bytes read, not record count.
- ✗
glue.driver.aggregate.recordsRead
Why it's wrong here
Not a standard CloudWatch metric.
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Same concept, more angles
1 more way this is tested on DEA-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A data engineer needs to monitor the number of records processed by an AWS Glue ETL job and send an alert if the count drops below a threshold. Which AWS service should be used to create this custom metric?
easy- A.Amazon S3
- B.AWS Config
- ✓ C.Amazon CloudWatch
- D.AWS CloudTrail
Why C: Amazon CloudWatch is the correct service for creating custom metrics because it allows you to publish your own data points, such as the number of records processed by an AWS Glue ETL job. You can use the CloudWatch PutMetricData API or the AWS Glue job script to emit a custom metric, then set an alarm on that metric to trigger an alert when the count drops below a threshold.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.