- A
Manually convert the Oracle schema to PostgreSQL using DDL statements.
Why wrong: Manual conversion is error-prone; use tools like Ora2Pg.
- B
Use DMS preview job to test migration before executing the full job.
Why wrong: DMS does not have a 'preview job' concept; it has validation and testing capabilities.
- C
Use Database Migration Service with continuous migration (CDC) to replicate ongoing changes.
CDC ensures near-zero downtime by replicating changes after the initial dump.
- D
Perform a full export using Oracle Data Pump and import directly into Cloud SQL.
Why wrong: This may cause downtime and does not provide CDC.
- E
Create connection profiles for both source and target databases in DMS.
Connection profiles are required for DMS to connect to source and target.
PCD Practice Question: Manage a Solution that Can Span Multiple Database Systems
This PCD practice question tests your understanding of manage a solution that can span multiple database systems. 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 financial services company is migrating from Oracle to Cloud SQL for PostgreSQL. They need to ensure data consistency during the migration and minimize downtime. Which two actions should they take? (Choose 2)
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 Database Migration Service with continuous migration (CDC) to replicate ongoing changes.
DMS continuous migration with CDC ensures minimal downtime by replicating changes. Connection profiles are necessary to configure source and target. Testing with DMS preview jobs is not a standard feature; DMS provides test jobs. Manual schema conversion is not recommended; use Ora2Pg.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Manually convert the Oracle schema to PostgreSQL using DDL statements.
Why it's wrong here
Manual conversion is error-prone; use tools like Ora2Pg.
- ✗
Use DMS preview job to test migration before executing the full job.
Why it's wrong here
DMS does not have a 'preview job' concept; it has validation and testing capabilities.
- ✓
Use Database Migration Service with continuous migration (CDC) to replicate ongoing changes.
Why this is correct
CDC ensures near-zero downtime by replicating changes after the initial dump.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
- ✗
Perform a full export using Oracle Data Pump and import directly into Cloud SQL.
Why it's wrong here
This may cause downtime and does not provide CDC.
- ✓
Create connection profiles for both source and target databases in DMS.
Why this is correct
Connection profiles are required for DMS to connect to source and target.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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. ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement. 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 ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCD ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this PCD question test?
Manage a Solution that Can Span Multiple Database Systems — This question tests Manage a Solution that Can Span Multiple Database Systems — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use Database Migration Service with continuous migration (CDC) to replicate ongoing changes. — DMS continuous migration with CDC ensures minimal downtime by replicating changes. Connection profiles are necessary to configure source and target. Testing with DMS preview jobs is not a standard feature; DMS provides test jobs. Manual schema conversion is not recommended; use Ora2Pg.
What should I do if I get this PCD question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCD ACL questions on filtering logic and placement.
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?
Standard ACLs match source addresses.
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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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