DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. 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 an on-premises Oracle database to Amazon RDS for Oracle. The database is 2 TB in size and has a 100 Mbps internet connection. The migration must be completed within 3 days with minimal downtime. Which approach is MOST suitable?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS Database Migration Service (DMS) with a full load from an AWS Snowball device, then ongoing replication.
Option A is correct because AWS DMS can perform a live migration with minimal downtime, and using an AWS Snowball for the initial load reduces the time over the slow internet connection. Option B is wrong because uploading over the internet would take too long. Option C is wrong because restoring from an on-premises backup over the internet is also slow. Option D is wrong because a VPN does not solve the bandwidth limitation.
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.
✗
Export the database as a dump file, upload to S3, and restore to RDS.
Why it's wrong here
Uploading 2 TB over the internet is too slow for the given timeline.
✓
Use AWS Database Migration Service (DMS) with a full load from an AWS Snowball device, then ongoing replication.
Why this is correct
Snowball handles the initial large data transfer, and DMS provides minimal downtime replication.
Related concept
Standard ACLs match source addresses.
✗
Use AWS DMS with full load over the internet, then ongoing replication.
Why it's wrong here
100 Mbps connection would take days for 2 TB, exceeding the 3-day window.
✗
Create a VPN connection to AWS and use Oracle Data Pump over the VPN.
Why it's wrong here
VPN does not increase bandwidth; still limited by 100 Mbps internet.
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 DBS-C01 ACL questions on filtering logic and placement.
Management and Operations — This question tests Management and Operations — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use AWS Database Migration Service (DMS) with a full load from an AWS Snowball device, then ongoing replication. — Option A is correct because AWS DMS can perform a live migration with minimal downtime, and using an AWS Snowball for the initial load reduces the time over the slow internet connection. Option B is wrong because uploading over the internet would take too long. Option C is wrong because restoring from an on-premises backup over the internet is also slow. Option D is wrong because a VPN does not solve the bandwidth limitation.
What should I do if I get this DBS-C01 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 DBS-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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