- A
Create a source connection profile in DMS.
Connection profiles define source and target endpoints.
- B
Ensure network connectivity between the source and Cloud SQL (e.g., VPC peering).
Required for DMS to connect to the source.
- C
Install Cloud SQL Auth Proxy on the source server.
Why wrong: Auth Proxy is optional; VPC peering or other connectivity can be used.
- D
Enable archivelog mode on the source Oracle database.
Required for CDC to capture changes.
- E
Convert all NUMBER columns to NUMERIC manually.
Why wrong: Data type mapping is handled by DMS; manual conversion is not a prerequisite.
Question 494 of 999
PCD Migrate Data Solutions Practice Question
This PCD practice question tests your understanding of migrate data solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 is performing a lift-and-shift migration of an on-premises Oracle database to Cloud SQL for PostgreSQL using DMS with continuous migration. Which THREE prerequisites must be met before starting the migration job?
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
✓
Create a source connection profile in DMS.
DMS continuous migration requires archivelog mode for CDC, appropriate network connectivity (VPC peering or proxy), and a connection profile for the source.
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.
- ✓
Create a source connection profile in DMS.
Why this is correct
Connection profiles define source and target endpoints.
Related concept
Standard ACLs match source addresses.
- ✓
Ensure network connectivity between the source and Cloud SQL (e.g., VPC peering).
Why this is correct
Required for DMS to connect to the source.
Related concept
Standard ACLs match source addresses.
- ✗
Install Cloud SQL Auth Proxy on the source server.
Why it's wrong here
Auth Proxy is optional; VPC peering or other connectivity can be used.
- ✓
Enable archivelog mode on the source Oracle database.
Why this is correct
Required for CDC to capture changes.
Related concept
Standard ACLs match source addresses.
- ✗
Convert all NUMBER columns to NUMERIC manually.
Why it's wrong here
Data type mapping is handled by DMS; manual conversion is not a prerequisite.
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 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.
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.
- →
Migrate Data Solutions — study guide chapter
Learn the concepts, then practise the 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 — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Create a source connection profile in DMS. — DMS continuous migration requires archivelog mode for CDC, appropriate network connectivity (VPC peering or proxy), and a connection profile for the source.
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.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jul 4, 2026
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