# Engineer certification exam topics vs Engineer I, II training labs
**URL:** https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433
**Category:** Elastic Training
**Created:** [July 16, 2020, 10:31am UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433 "2020-07-16T10:31:28Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@jkhere](https://discuss.elastic.co/u/jkhere)
#### Post date: [July 16, 2020, 10:31am UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/1 "2020-07-16T10:31:29Z")
Hi,
The following topics are included in the official [exam objectives](https://www.elastic.co/training/elastic-certified-engineer-exam) but these are missing in the labs of Engineer I and II training labs.
- Write and execute pipeline aggregations
- Use the scroll API to retrieve large numbers of results
\*Configure an index that implements a parent/child relationship
Are these topics included in the exam ?
Also, training labs list CCR as an exam prep topic but it is not included in the exam objective. Is it correct to assume that only CCS is included in exams ?
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### Author:  [@Rich\_Raposa](https://discuss.elastic.co/u/Rich_Raposa)
#### Post date: [July 16, 2020, 2:57pm UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/2 "2020-07-16T14:57:56Z")
The exam no longer covers pipeline aggregations or the Scroll API. Thank you for pointing out the incorrect details.
The exam _does_ cover cross cluster search, and there is nothing on the exam that is not listed in the exam objectives.
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### Author:  [@jkhere](https://discuss.elastic.co/u/jkhere)
#### Post date: [July 16, 2020, 3:07pm UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/3 "2020-07-16T15:07:49Z")
Thank you Rich for confirming,
How about this one on the list above ?
- Configure an index that implements a parent/child relationship
I know that nested objects are covered. Is 'join' data type covered as well?
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### Author:  [@Rich\_Raposa](https://discuss.elastic.co/u/Rich_Raposa)
#### Post date: [July 16, 2020, 3:27pm UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/4 "2020-07-16T15:27:32Z")
Parent/child is no longer on the exam either.
Somehow an out-dated list of objectives has made its way onto the website. We are working on fixing that now. Thank you for pointing it out!
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### Author:  [@jkhere](https://discuss.elastic.co/u/jkhere)
#### Post date: [July 16, 2020, 3:28pm UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/5 "2020-07-16T15:28:52Z")
Thank you.
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### Author:  [@whatgeorgemade](https://discuss.elastic.co/u/whatgeorgemade)
#### Post date: [July 23, 2020, 9:36pm UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/6 "2020-07-23T21:36:16Z")
Hi Rich.
Out of curiosity, what's the reasoning behind removing pipeline aggregations from the exam?
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### Author:  [@Rich\_Raposa](https://discuss.elastic.co/u/Rich_Raposa)
#### Post date: [July 23, 2020, 9:55pm UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/7 "2020-07-23T21:55:37Z")
Nothing to do with the functionality or the usefulness of pipeline aggs - they are an awesome feature of the Query DSL! It was strictly based on logistics: we no longer teach that topic in our Engineer training courses because there just wasn't enough time to cover it properly.
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### Author:  [@whatgeorgemade](https://discuss.elastic.co/u/whatgeorgemade)
#### Post date: [July 23, 2020, 10:32pm UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/8 "2020-07-23T22:32:26Z")
Understood. Thanks for the clarification.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 22, 2020, 10:38pm UTC](https://discuss.elastic.co/t/engineer-certification-exam-topics-vs-engineer-i-ii-training-labs/241433/9 "2020-08-22T22:38:37Z")
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