DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 planning to deploy a new Amazon RDS for Oracle database in a Multi-AZ configuration. The database must be highly available and fault-tolerant. Which THREE actions should the company take to meet these requirements? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Multi-AZ deployment
Multi-AZ deployment automatically creates a standby instance in a different AZ. Automated backups are enabled by default and stored across multiple AZs. Retaining automated backups for 35 days provides point-in-time recovery. Read replicas are for read scaling, not high availability. Manual snapshots are for long-term retention, not high availability. Multi-Region replication is for disaster recovery, not high availability.
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 manual snapshots daily
Why it's wrong here
Manual snapshots are for long-term retention, not high availability.
✗
Create a read replica in a different Availability Zone
Why it's wrong here
Read replicas do not provide automatic failover.
✓
Enable Multi-AZ deployment
Why this is correct
Multi-AZ provides automatic failover.
Related concept
Standard ACLs match source addresses.
✓
Enable automated backups with a retention period of 35 days
Why this is correct
Automated backups enable point-in-time recovery and are stored across AZs.
Related concept
Standard ACLs match source addresses.
✓
Enable deletion protection
Why this is correct
Deletion protection prevents accidental deletion, adding to fault tolerance.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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.
Deployment and Migration — This question tests Deployment and Migration — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Enable Multi-AZ deployment — Multi-AZ deployment automatically creates a standby instance in a different AZ. Automated backups are enabled by default and stored across multiple AZs. Retaining automated backups for 35 days provides point-in-time recovery. Read replicas are for read scaling, not high availability. Manual snapshots are for long-term retention, not high availability. Multi-Region replication is for disaster recovery, not high availability.
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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