The answer is to use AWS Database Migration Service for ongoing replication, AWS Schema Conversion Tool for schema assessment, and a VPN connection for secure network connectivity. These three steps work together to enable a near-zero downtime migration by first performing a full load of the Oracle database to Amazon RDS, then using DMS’s change data capture to continuously replicate ongoing transactions from the source until cutover. On the AWS Certified Data Engineer Associate exam, this scenario tests your understanding of how to architect a live migration without service interruption, often appearing as a multi-select question where the trap is choosing a full load without CDC or disabling archive logs, which would break point-in-time recovery and increase downtime. Remember the mnemonic “DMS, SCT, VPN” to recall the three pillars of a minimal-downtime migration: replication, schema conversion, and secure connectivity.
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. 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.
Which THREE steps are recommended for migrating an on-premises Oracle database to Amazon RDS for Oracle with minimal downtime? (Choose 3.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set up a VPN or Direct Connect between on-premises and AWS
Options A, C, and E are correct because DMS supports ongoing replication, SCT assesses schema, and setting up a VPN ensures secure connectivity. Option B is wrong because full load without CDC does not minimize downtime. Option D is wrong because disabling archiving prevents point-in-time recovery.
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.
✓
Set up a VPN or Direct Connect between on-premises and AWS
Why this is correct
Secure connectivity is essential.
Related concept
Standard ACLs match source addresses.
✗
Disable archiving on the source database
Why it's wrong here
Archiving is needed for change data capture.
✓
Use AWS Schema Conversion Tool (SCT) to convert the schema
Why this is correct
SCT helps convert Oracle schema to RDS.
Related concept
Standard ACLs match source addresses.
✗
Perform a full load migration without change data capture
Why it's wrong here
Full load requires downtime.
✓
Use AWS Database Migration Service (DMS) for ongoing replication
Why this is correct
Ongoing replication minimizes downtime.
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 DEA-C01 ACL questions on filtering logic and placement.
Data Store Management — This question tests Data Store Management — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Set up a VPN or Direct Connect between on-premises and AWS — Options A, C, and E are correct because DMS supports ongoing replication, SCT assesses schema, and setting up a VPN ensures secure connectivity. Option B is wrong because full load without CDC does not minimize downtime. Option D is wrong because disabling archiving prevents point-in-time recovery.
What should I do if I get this DEA-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 DEA-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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