- A
After writing, have the application wait for a confirmation that the write is durable before performing a read.
Application-level confirmation ensures consistency.
- B
Use single-cluster routing for read/write operations within the primary region.
Ensures reads see recent writes within the same cluster.
- C
Disable replication and use only the primary cluster.
Why wrong: Would lose DR capability.
- D
Use multi-cluster routing to distribute reads across regions.
Why wrong: May read from a replica that hasn't caught up.
- E
Monitor replication lag metrics to ensure replicas are up to date.
Helps detect when replicas are lagging.
Question 195 of 1,000
PCDOE Manage Database Solutions 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. 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.
A Cloud Bigtable instance is configured with asynchronous replication across two regions for disaster recovery. The team needs to ensure that read-after-write consistency is maintained within a region. Which three strategies should they implement? (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
✓
After writing, have the application wait for a confirmation that the write is durable before performing a read.
Option A is correct because in Cloud Bigtable, writes are acknowledged only after they are committed to the tablet server's log and replicated to the underlying Colossus file system. By waiting for this confirmation before performing a read, the application ensures that the read will see the latest write, providing read-after-write consistency within the region.
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.
- ✓
After writing, have the application wait for a confirmation that the write is durable before performing a read.
Why this is correct
Application-level confirmation ensures consistency.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use single-cluster routing for read/write operations within the primary region.
Why this is correct
Ensures reads see recent writes within the same cluster.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Disable replication and use only the primary cluster.
Why it's wrong here
Would lose DR capability.
- ✗
Use multi-cluster routing to distribute reads across regions.
Why it's wrong here
May read from a replica that hasn't caught up.
- ✓
Monitor replication lag metrics to ensure replicas are up to date.
Why this is correct
Helps detect when replicas are lagging.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse asynchronous replication with eventual consistency and assume that monitoring replication lag alone can guarantee read-after-write consistency, when in fact only application-level write confirmation and single-cluster routing provide that guarantee within a region.
Detailed technical explanation
How to think about this question
Cloud Bigtable uses a distributed storage system based on Colossus and Google's Chubby lock service. Asynchronous replication replicates data at the tablet level, and replication lag is measured in seconds to minutes depending on network conditions and write volume. Monitoring replication lag (Option E) helps detect when replicas are behind, but it does not guarantee read-after-write consistency; it is a diagnostic tool, not a consistency enforcement mechanism.
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 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Visual reference
What to study next
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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: After writing, have the application wait for a confirmation that the write is durable before performing a read. — Option A is correct because in Cloud Bigtable, writes are acknowledged only after they are committed to the tablet server's log and replicated to the underlying Colossus file system. By waiting for this confirmation before performing a read, the application ensures that the read will see the latest write, providing read-after-write consistency within the region.
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.
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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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