- A
It reduces execution time and cost by reusing unchanged component outputs.
This is the primary benefit of caching.
- B
It encrypts data at rest.
Why wrong: Encryption is separate from caching.
- C
It automatically scales the pipeline resources.
Why wrong: Caching does not affect scaling.
- D
It enables parallel execution of components.
Why wrong: Parallel execution is achieved via dsl.Collected, not caching.
Question 742 of 1,000
PMLE Automating and Orchestrating ML Pipelines Practice Question
This PMLE practice question tests your understanding of automating and orchestrating ml pipelines. 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.
What is the primary benefit of using pipeline caching in Vertex AI Pipelines?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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
✓
It reduces execution time and cost by reusing unchanged component outputs.
Pipeline caching in Vertex AI Pipelines automatically detects when a component's inputs and code have not changed from a previous execution and reuses the cached output artifacts. This avoids redundant computation, directly reducing both execution time and cost by skipping re-execution of unchanged steps.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It reduces execution time and cost by reusing unchanged component outputs.
Why this is correct
This is the primary benefit of caching.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
It encrypts data at rest.
Why it's wrong here
Encryption is separate from caching.
- ✗
It automatically scales the pipeline resources.
Why it's wrong here
Caching does not affect scaling.
- ✗
It enables parallel execution of components.
Why it's wrong here
Parallel execution is achieved via dsl.Collected, not caching.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between caching (reusing outputs) and parallelization (running components concurrently), so candidates may confuse the two and incorrectly select parallel execution as the primary benefit.
Detailed technical explanation
How to think about this question
Under the hood, Vertex AI Pipelines uses a cache key derived from the component's image digest, source code hash, and input artifact URIs. When a pipeline run is triggered, the service checks a persistent cache store (backed by Cloud Storage) for matching keys; if found, it skips the component execution and directly passes the cached outputs to downstream steps. This is especially valuable in iterative ML workflows where only a few components change (e.g., hyperparameter tuning) while data preprocessing remains static, saving significant compute and time.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this PMLE question test?
Automating and Orchestrating ML Pipelines — This question tests Automating and Orchestrating ML Pipelines — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It reduces execution time and cost by reusing unchanged component outputs. — Pipeline caching in Vertex AI Pipelines automatically detects when a component's inputs and code have not changed from a previous execution and reuses the cached output artifacts. This avoids redundant computation, directly reducing both execution time and cost by skipping re-execution of unchanged steps.
What should I do if I get this PMLE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
This PMLE practice question is part of Courseiva's free Google Cloud 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 PMLE exam.
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