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 its on-premises Oracle database to Amazon RDS for Oracle. The database is 2 TB in size and the network bandwidth is 100 Mbps. The migration must have minimal downtime. Which TWO approaches should be used together to achieve this?
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 ongoing replication to keep the target in sync.
AWS DMS with ongoing replication allows continuous data replication with minimal downtime. AWS Snowball can be used for the initial large data transfer to avoid prolonged network transfer. Option B (increasing bandwidth) is not feasible quickly; Option C (taking a backup and restoring) would cause downtime; Option E (SCT) is for schema conversion, not data migration.
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.
✗
Take a full backup of the source database and restore it to Amazon RDS.
Why it's wrong here
This would cause significant downtime.
✗
Increase the network bandwidth to 1 Gbps to speed up the transfer.
Why it's wrong here
Network bandwidth increase may not be feasible or quick.
✗
Use AWS Schema Conversion Tool (SCT) to convert the schema before migration.
Why it's wrong here
SCT is for schema conversion, not for minimizing downtime during data migration.
✓
Use AWS Database Migration Service (DMS) with ongoing replication to keep the target in sync.
Why this is correct
DMS supports ongoing replication to minimize downtime.
Related concept
Standard ACLs match source addresses.
✓
Use AWS Snowball to transfer the initial data load to Amazon S3, then use DMS to migrate the remaining changes.
Why this is correct
Snowball handles large data transfer efficiently.
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 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 ongoing replication to keep the target in sync. — AWS DMS with ongoing replication allows continuous data replication with minimal downtime. AWS Snowball can be used for the initial large data transfer to avoid prolonged network transfer. Option B (increasing bandwidth) is not feasible quickly; Option C (taking a backup and restoring) would cause downtime; Option E (SCT) is for schema conversion, not data migration.
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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