- A
Create an index exemption for the array field to enable indexing
Why wrong: Incorrect. Index exemptions exclude fields from indexing, not enable them. Creating an exemption for the array field would prevent array-contains queries.
- B
Switch to Datastore mode and configure indexes manually
Why wrong: Incorrect. Datastore mode requires manual index configuration and is not needed here. Native mode automatically indexes arrays.
- C
Create a composite index that includes the array field
Why wrong: Incorrect. Composite indexes are for queries involving multiple fields. A simple array-contains query on a single field does not require a composite index.
- D
No additional index configuration is required; arrays are automatically indexed
Correct. In Firestore Native mode, array fields are automatically indexed, so no additional configuration is needed for array-contains queries.
PCDOE Automatic indexing Practice Question
This PCDOE practice question tests your understanding of manage database solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: automatic indexing. 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 company uses Firestore in Native mode and has a collection with many documents containing array fields. They want to index the array values to support queries like 'array-contains'. What is the correct approach?
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
No additional index configuration is required; arrays are automatically indexed
In Firestore Native mode, all fields are automatically indexed by default, including array fields. For array fields, the index includes each element, which allows queries using the `array-contains` operator to work without any additional configuration. Index exemptions are used to exclude specific fields from automatic indexing, not to enable indexing. Therefore, no action is required.
Key principle: Automatic indexing
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create an index exemption for the array field to enable indexing
Why it's wrong here
Incorrect. Index exemptions exclude fields from indexing, not enable them. Creating an exemption for the array field would prevent array-contains queries.
- ✗
Switch to Datastore mode and configure indexes manually
Why it's wrong here
Incorrect. Datastore mode requires manual index configuration and is not needed here. Native mode automatically indexes arrays.
- ✗
Create a composite index that includes the array field
Why it's wrong here
Incorrect. Composite indexes are for queries involving multiple fields. A simple array-contains query on a single field does not require a composite index.
- ✓
No additional index configuration is required; arrays are automatically indexed
Why this is correct
Correct. In Firestore Native mode, array fields are automatically indexed, so no additional configuration is needed for array-contains queries.
Related concept
Automatic indexing
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often confuse Firestore Native mode with Datastore mode. In Native mode, indexes are automatic; in Datastore mode, indexes must be manually configured. Also, 'index exemption' is for excluding fields, not adding them.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Automatic indexing
- array-contains query
- Index exemption
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
Automatic indexing
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Automatic indexing Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review automatic indexing, then practise related PCDOE questions on the same topic to reinforce the concept.
- →
Manage Database Solutions — study guide chapter
Learn the concepts, then practise the questions
- →
Manage Database Solutions practice questions
Targeted practice on this topic area only
- →
All PCDOE questions
1,000 questions across all exam domains
- →
Google Professional Cloud DevOps Engineer study guide
Full concept coverage aligned to exam objectives
- →
PCDOE practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related PCDOE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Design and Plan Database Solutions practice questions
Practise PCDOE questions linked to Design and Plan Database Solutions.
Manage Database Solutions practice questions
Practise PCDOE questions linked to Manage Database Solutions.
Migrate Database Solutions practice questions
Practise PCDOE questions linked to Migrate Database Solutions.
Design for Reliability, Scalability, and Disaster Recovery practice questions
Practise PCDOE questions linked to Design for Reliability, Scalability, and Disaster Recovery.
Bootstrapping a Google Cloud organization for DevOps practice questions
Practise PCDOE questions linked to Bootstrapping a Google Cloud organization for DevOps.
Managing service incidents practice questions
Practise PCDOE questions linked to Managing service incidents.
Managing Google Cloud costs practice questions
Practise PCDOE questions linked to Managing Google Cloud costs.
Building and implementing CI/CD pipelines practice questions
Practise PCDOE questions linked to Building and implementing CI/CD pipelines.
Implementing service monitoring strategies practice questions
Practise PCDOE questions linked to Implementing service monitoring strategies.
Optimizing service performance practice questions
Practise PCDOE questions linked to Optimizing service performance.
PCDOE fundamentals practice questions
Practise PCDOE questions linked to PCDOE fundamentals.
PCDOE scenario practice questions
Practise PCDOE questions linked to PCDOE scenario.
Practice this exam
Start a free PCDOE practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this PCDOE question test?
Manage Database Solutions — This question tests Manage Database Solutions — Automatic indexing.
What is the correct answer to this question?
The correct answer is: No additional index configuration is required; arrays are automatically indexed — In Firestore Native mode, all fields are automatically indexed by default, including array fields. For array fields, the index includes each element, which allows queries using the `array-contains` operator to work without any additional configuration. Index exemptions are used to exclude specific fields from automatic indexing, not to enable indexing. Therefore, no action is required.
What should I do if I get this PCDOE question wrong?
Review automatic indexing, then practise related PCDOE questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Automatic indexing
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More PCDOE practice questions
- Order the steps to configure a VPC Network Peering between two projects.
- Refer to the exhibit. The Cloud Build fails with a permission error. The Cloud Build service account has roles/cloudbuil…
- A company is setting up a new Google Cloud organization. They want to ensure that all projects inherit common IAM polici…
- A DevOps team is bootstrapping their Google Cloud organization and wants to enable Infrastructure as Code (IaC) using Te…
- To securely manage secrets (e.g., API keys) used in Cloud Build pipelines, which service should be used?
- A DevOps engineer needs to set up a centralized logging solution for multiple projects. They want to store logs in a Big…
Last reviewed: Jul 4, 2026
This PCDOE 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 PCDOE exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.