- A
Export the Oracle database as a dump file and import it into Cloud SQL manually.
Why wrong: Manual import requires significant downtime and does not provide continuous sync.
- B
Use DMS with a continuous migration job, allowing CDC replication until cutover.
Continuous migration with CDC enables near-zero downtime by keeping the target in sync.
- C
Use DMS with a one-time migration job, then manually sync changes before cutover.
Why wrong: One-time migration does not provide continuous sync; manual sync is error-prone and may cause data loss.
- D
Use Cloud SQL Auth Proxy to connect Oracle to Cloud SQL and replicate data using a custom script.
Why wrong: Auth Proxy is for secure connectivity, not replication; custom scripts are unreliable for production.
Question 715 of 980
PCD Migrate Data Solutions Practice Question
This PCD practice question tests your understanding of migrate data 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.
A company plans to migrate an on-premises Oracle database to Cloud SQL for PostgreSQL. They need to minimize downtime and ensure continuous sync during migration. Which migration approach should they use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
✓
Use DMS with a continuous migration job, allowing CDC replication until cutover.
Database Migration Service (DMS) with a continuous migration job enables ongoing Change Data Capture (CDC) replication from the source Oracle database to Cloud SQL for PostgreSQL. This approach keeps the target database synchronized with minimal downtime, allowing a controlled cutover when the migration is complete. It is the only option that satisfies the requirements of continuous sync and minimal downtime.
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.
- ✗
Export the Oracle database as a dump file and import it into Cloud SQL manually.
Why it's wrong here
Manual import requires significant downtime and does not provide continuous sync.
- ✓
Use DMS with a continuous migration job, allowing CDC replication until cutover.
Why this is correct
Continuous migration with CDC enables near-zero downtime by keeping the target in sync.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use DMS with a one-time migration job, then manually sync changes before cutover.
Why it's wrong here
One-time migration does not provide continuous sync; manual sync is error-prone and may cause data loss.
- ✗
Use Cloud SQL Auth Proxy to connect Oracle to Cloud SQL and replicate data using a custom script.
Why it's wrong here
Auth Proxy is for secure connectivity, not replication; custom scripts are unreliable for production.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between one-time and continuous migration jobs, where candidates mistakenly believe a one-time job plus manual sync is sufficient for minimal downtime, overlooking the need for automated CDC to avoid data loss and extended cutover windows.
Detailed technical explanation
How to think about this question
DMS continuous migration uses logical replication by reading the Oracle redo logs via LogMiner or XStream to capture insert, update, and delete operations in near real-time. This CDC process applies changes to the PostgreSQL target using a compatible schema mapping, handling data type conversions automatically. In a real-world scenario, the cutover window can be reduced to seconds by stopping writes to the source, allowing DMS to apply any remaining lag, then promoting the target as the new primary.
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.
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.
- →
Migrate Data Solutions — study guide chapter
Learn the concepts, then practise the questions
- →
Migrate Data Solutions practice questions
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FAQ
Questions learners often ask
What does this PCD question test?
Migrate Data Solutions — This question tests Migrate Data Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use DMS with a continuous migration job, allowing CDC replication until cutover. — Database Migration Service (DMS) with a continuous migration job enables ongoing Change Data Capture (CDC) replication from the source Oracle database to Cloud SQL for PostgreSQL. This approach keeps the target database synchronized with minimal downtime, allowing a controlled cutover when the migration is complete. It is the only option that satisfies the requirements of continuous sync and minimal downtime.
What should I do if I get this PCD 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: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 PCD 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 PCD exam.
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