- A
The CDC phase continues to replicate DML but may fail if the column is required
DMS replicates DML, but if the DDL adds a NOT NULL column, DML may fail. Manual remediation is needed.
- B
The migration job automatically skips the new column
Why wrong: DMS does not skip new columns.
- C
The migration job pauses and asks for manual intervention
Why wrong: DMS does not pause; it may fail.
- D
The schema change is automatically replicated to Cloud SQL
Why wrong: DMS does not replicate DDL changes automatically.
Question 325 of 980
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. 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 has an Oracle database and wants to migrate to Cloud SQL for PostgreSQL using Database Migration Service. They set up a connection profile and a continuous migration job. After the initial load, the CDC phase begins. Suddenly, the source database has a schema change (adding a column). What happens?
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
✓
The CDC phase continues to replicate DML but may fail if the column is required
DMS does not automatically replicate DDL changes. The column would be added to the source but not to the destination, potentially causing the CDC to fail due to data type mismatches.
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.
- ✓
The CDC phase continues to replicate DML but may fail if the column is required
Why this is correct
DMS replicates DML, but if the DDL adds a NOT NULL column, DML may fail. Manual remediation is needed.
Related concept
Standard ACLs match source addresses.
- ✗
The migration job automatically skips the new column
Why it's wrong here
DMS does not skip new columns.
- ✗
The migration job pauses and asks for manual intervention
Why it's wrong here
DMS does not pause; it may fail.
- ✗
The schema change is automatically replicated to Cloud SQL
Why it's wrong here
DMS does not replicate DDL changes automatically.
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: The CDC phase continues to replicate DML but may fail if the column is required — DMS does not automatically replicate DDL changes. The column would be added to the source but not to the destination, potentially causing the CDC to fail due to data type mismatches.
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
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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