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Accelerate Workload Migration and Modernization →mediumMultiple ChoiceObjective-mapped

SAP-C02 Practice Question: Accelerate Workload Migration and Modernization

This SAP-C02 practice question tests your understanding of accelerate workload migration and modernization. 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 migrating a large on-premises Oracle database to Amazon RDS for Oracle. The database is 2 TB in size and has a 24/7 uptime requirement. The company plans to use AWS Database Migration Service (AWS DMS) for continuous replication with minimal downtime. The source database is Oracle 11g running on Linux. During the full load phase, AWS DMS reports high latency and the replication slows down significantly. The source database CPU utilization is at 100% during the migration. The company needs to minimize the impact on production workload. What should the company do to improve the migration performance and reduce impact on the source database?

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.

A
Use AWS DMS change data capture (CDC) only, without full load, to reduce the load
Why wrong: Using CDC only without full load still requires an initial full load to populate the target database, so it does not resolve the high latency during the full load phase. Additionally, the source CPU would still be under heavy load during that initial load.
B
Increase the size of the DMS replication instance to handle more load
Why wrong: Increasing the size of the DMS replication instance improves the processing capacity of DMS, but the bottleneck is the source database (100% CPU). Unless the replication instance is undersized, increasing it further won't alleviate the source CPU pressure.
C
Reduce the number of parallel load threads in the DMS task to decrease source CPU usage
Why wrong: Reducing the number of parallel load threads can decrease CPU usage on the source, but it will slow down the migration and extend the full load duration. This may not be ideal for minimizing impact and could prolong the exposure.
D
Set up an Oracle read replica and use it as the source for AWS DMS
Setting up an Oracle read replica and using it as the source for AWS DMS offloads the replication overhead from the primary database, eliminating the CPU bottleneck and allowing the migration to proceed with minimal impact on the production workload.

Full breakdown with real-world context →

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

✓

Set up an Oracle read replica and use it as the source for AWS DMS

Option D is correct: Using a read replica as the source for AWS DMS offloads the load from the primary database, reducing impact on production. Option A (using CDC only) still requires an initial full load to synchronize the target, so it does not address the full load bottleneck. Option B (increasing the DMS replication instance size) may not help if the source database itself is the bottleneck, as indicated by the 100% CPU usage. Option C (reducing parallel load threads) would decrease source CPU usage but would also slow down the migration, prolonging the window of impact; a read replica is a better solution.

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.

✗
Use AWS DMS change data capture (CDC) only, without full load, to reduce the load
Why it's wrong here
Using CDC only without full load still requires an initial full load to populate the target database, so it does not resolve the high latency during the full load phase. Additionally, the source CPU would still be under heavy load during that initial load.
✗
Increase the size of the DMS replication instance to handle more load
Why it's wrong here
Increasing the size of the DMS replication instance improves the processing capacity of DMS, but the bottleneck is the source database (100% CPU). Unless the replication instance is undersized, increasing it further won't alleviate the source CPU pressure.
✗
Reduce the number of parallel load threads in the DMS task to decrease source CPU usage
Why it's wrong here
Reducing the number of parallel load threads can decrease CPU usage on the source, but it will slow down the migration and extend the full load duration. This may not be ideal for minimizing impact and could prolong the exposure.
✓
Set up an Oracle read replica and use it as the source for AWS DMS
Why this is correct
Setting up an Oracle read replica and using it as the source for AWS DMS offloads the replication overhead from the primary database, eliminating the CPU bottleneck and allowing the migration to proceed with minimal impact on the production workload.
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 SAP-C02 ACL questions on filtering logic and placement.

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FAQ

Questions learners often ask

What does this SAP-C02 question test?

Accelerate Workload Migration and Modernization — This question tests Accelerate Workload Migration and Modernization — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: Set up an Oracle read replica and use it as the source for AWS DMS — Option D is correct: Using a read replica as the source for AWS DMS offloads the load from the primary database, reducing impact on production. Option A (using CDC only) still requires an initial full load to synchronize the target, so it does not address the full load bottleneck. Option B (increasing the DMS replication instance size) may not help if the source database itself is the bottleneck, as indicated by the 100% CPU usage. Option C (reducing parallel load threads) would decrease source CPU usage but would also slow down the migration, prolonging the window of impact; a read replica is a better solution.

What should I do if I get this SAP-C02 question wrong?

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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