- A
Ensure the application can handle eventual consistency between clusters.
Bigtable replication is asynchronous, so occasional stale reads are possible.
- B
Enable synchronous replication between clusters.
Why wrong: Bigtable only supports asynchronous replication.
- C
Add a second cluster in a different zone (e.g., us-east1-b) and enable replication.
Adding a second cluster in another zone provides regional HA.
- D
Configure the application to route traffic to the secondary cluster in case of primary failure.
Traffic routing must be updated to use the healthy cluster.
- E
Take a full backup of the table to Cloud Storage daily.
Why wrong: Backups are for data durability, not for near-instant failover.
Question 885 of 1,000
PCDOE Manage Database Solutions Practice Question
This PCDOE practice question tests your understanding of manage database solutions. 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.
You are designing a disaster recovery plan for a Cloud Bigtable instance. The instance has a single cluster in us-east1. You need to ensure that if the cluster becomes unavailable, the database can still serve read and write requests with minimal downtime. Which THREE steps should you take? (Choose three.)
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
✓
Ensure the application can handle eventual consistency between clusters.
Option A is correct because Cloud Bigtable uses eventual consistency for replication across clusters. When you add a second cluster and enable replication, data is replicated asynchronously, meaning writes to one cluster are not immediately visible in the other. The application must be designed to handle eventual consistency to avoid reading stale data after a failover.
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.
- ✓
Ensure the application can handle eventual consistency between clusters.
Why this is correct
Bigtable replication is asynchronous, so occasional stale reads are possible.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable synchronous replication between clusters.
Why it's wrong here
Bigtable only supports asynchronous replication.
- ✓
Add a second cluster in a different zone (e.g., us-east1-b) and enable replication.
Why this is correct
Adding a second cluster in another zone provides regional HA.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Configure the application to route traffic to the secondary cluster in case of primary failure.
Why this is correct
Traffic routing must be updated to use the healthy cluster.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Take a full backup of the table to Cloud Storage daily.
Why it's wrong here
Backups are for data durability, not for near-instant failover.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that synchronous replication is available in Cloud Bigtable, but the service only supports asynchronous replication, and candidates may also incorrectly think that daily backups are sufficient for high availability instead of using multi-cluster replication.
Detailed technical explanation
How to think about this question
Cloud Bigtable replication uses a multi-cluster deployment model where each cluster is in a separate zone or region. Replication is asynchronous with a typical replication lag of under a second in most cases, but can be higher under heavy write loads. The application must use the Cloud Bigtable client library's routing policy (e.g., 'RouteToPrimaryCluster' or 'RouteToClosestCluster') to handle failover and eventual consistency correctly.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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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Manage Database Solutions — study guide chapter
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FAQ
Questions learners often ask
What does this PCDOE question test?
Manage Database Solutions — This question tests Manage Database Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Ensure the application can handle eventual consistency between clusters. — Option A is correct because Cloud Bigtable uses eventual consistency for replication across clusters. When you add a second cluster and enable replication, data is replicated asynchronously, meaning writes to one cluster are not immediately visible in the other. The application must be designed to handle eventual consistency to avoid reading stale data after a failover.
What should I do if I get this PCDOE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 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.
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