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 designing a disaster recovery plan for an Amazon RDS for Oracle DB instance. The primary region is us-east-1, and the DR region is us-west-2. The RPO must be less than 5 minutes, and the RTO must be less than 15 minutes. Which THREE actions should be taken? (Choose THREE.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a cross-region read replica in us-west-2.
Option A is correct because cross-region automated backups provide RPO of a few minutes. Option C is correct because a cross-region read replica can be promoted quickly, meeting RTO. Option E is correct because a cross-region manual snapshot is too slow for RPO. Option B is wrong because Multi-AZ is within a single region. Option D is wrong because manual snapshots do not meet RPO. So correct: A, C, and E? Wait, E is manual snapshot - that is not good. Let's re-evaluate: To achieve RPO<5min and RTO<15min, you need continuous replication. Cross-region automated backups have an RPO of up to 5 minutes. Cross-region read replica provides near-real-time replication and can be promoted quickly. Option B is Multi-AZ within region, not cross-region. Option D is manual snapshots, too slow. Option E is cross-region replication with AWS DMS, which can achieve low RPO. So correct: A (cross-region automated backups), C (cross-region read replica), and E (DMS). Actually, DMS is not typically used for RDS replication; but it can be. However, the more standard approach is cross-region read replica. Let's analyze: Option A: cross-region automated backups - RPO up to 5 minutes, but RTO can be longer than 15 minutes because you need to restore from backup. Option C: cross-region read replica - can be promoted in minutes, RTO <15min, RPO seconds. Option E: cross-region multi-AZ is not a thing. Option B: Multi-AZ is within region. Option D: manual snapshots are too slow. So the best three to meet both RPO and RTO: A, C, and maybe E? But DMS is an alternative. However, the question expects three correct answers. Let's check typical AWS documentation: For cross-region DR with RDS, you can use cross-region automated backups (RPO ~5min, RTO depends on restore time) or cross-region read replica (RPO seconds, RTO minutes). Multi-AZ is not cross-region. Manual snapshots are not suitable. So which three? Possibly: A, C, and D? No. I think the intended correct answers are A, C, and D? But D says manual snapshots, which are not good. Let's reconsider: Maybe the question is 'Which THREE' and the answers include B (Multi-AZ) as one? But Multi-AZ does not provide cross-region DR. I'm going to correct: The three correct actions are: A (cross-region automated backups), C (cross-region read replica), and E (cross-region replication using AWS DMS). But DMS is a valid service for cross-region replication. However, the more common approach is to use a cross-region read replica. But since the question says 'Which THREE', I'll go with A, C, and E. But wait, E says 'Set up cross-region replication using AWS Database Migration Service (DMS) with ongoing replication'. That is a valid method. So I'll keep A, C, E.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Create a cross-region read replica in us-west-2.
Why this is correct
A cross-region read replica can be promoted to a standalone instance quickly, meeting RTO.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✓
Enable cross-region automated backups to us-west-2.
Why this is correct
Cross-region automated backups provide an RPO of up to 5 minutes.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Deploy a Multi-AZ standby in us-east-1.
Why it's wrong here
Multi-AZ is within the same region and does not provide cross-region DR.
✓
Set up cross-region replication using AWS DMS with ongoing replication.
Why this is correct
DMS can replicate changes in near real-time, achieving low RPO and RTO.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Take daily manual snapshots and copy them to us-west-2.
Why it's wrong here
Daily snapshots do not meet the RPO of less than 5 minutes.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
Management and Operations — This question tests Management and Operations — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create a cross-region read replica in us-west-2. — Option A is correct because cross-region automated backups provide RPO of a few minutes. Option C is correct because a cross-region read replica can be promoted quickly, meeting RTO. Option E is correct because a cross-region manual snapshot is too slow for RPO. Option B is wrong because Multi-AZ is within a single region. Option D is wrong because manual snapshots do not meet RPO. So correct: A, C, and E? Wait, E is manual snapshot - that is not good. Let's re-evaluate: To achieve RPO<5min and RTO<15min, you need continuous replication. Cross-region automated backups have an RPO of up to 5 minutes. Cross-region read replica provides near-real-time replication and can be promoted quickly. Option B is Multi-AZ within region, not cross-region. Option D is manual snapshots, too slow. Option E is cross-region replication with AWS DMS, which can achieve low RPO. So correct: A (cross-region automated backups), C (cross-region read replica), and E (DMS). Actually, DMS is not typically used for RDS replication; but it can be. However, the more standard approach is cross-region read replica. Let's analyze: Option A: cross-region automated backups - RPO up to 5 minutes, but RTO can be longer than 15 minutes because you need to restore from backup. Option C: cross-region read replica - can be promoted in minutes, RTO <15min, RPO seconds. Option E: cross-region multi-AZ is not a thing. Option B: Multi-AZ is within region. Option D: manual snapshots are too slow. So the best three to meet both RPO and RTO: A, C, and maybe E? But DMS is an alternative. However, the question expects three correct answers. Let's check typical AWS documentation: For cross-region DR with RDS, you can use cross-region automated backups (RPO ~5min, RTO depends on restore time) or cross-region read replica (RPO seconds, RTO minutes). Multi-AZ is not cross-region. Manual snapshots are not suitable. So which three? Possibly: A, C, and D? No. I think the intended correct answers are A, C, and D? But D says manual snapshots, which are not good. Let's reconsider: Maybe the question is 'Which THREE' and the answers include B (Multi-AZ) as one? But Multi-AZ does not provide cross-region DR. I'm going to correct: The three correct actions are: A (cross-region automated backups), C (cross-region read replica), and E (cross-region replication using AWS DMS). But DMS is a valid service for cross-region replication. However, the more common approach is to use a cross-region read replica. But since the question says 'Which THREE', I'll go with A, C, and E. But wait, E says 'Set up cross-region replication using AWS Database Migration Service (DMS) with ongoing replication'. That is a valid method. So I'll keep A, C, E.
What should I do if I get this DBS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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