- A
Configure the primary database to automatically archive redo logs to Amazon S3, and have the standby download them from S3.
Why wrong: This still involves data transfer over the network and may not reduce the time to apply logs.
- B
Use Oracle Automatic Storage Management (ASM) to mirror data across Regions.
Why wrong: ASM is for local storage management, not cross-Region replication.
- C
Replace Oracle Data Guard with Amazon EBS snapshot replication across Regions.
Why wrong: EBS snapshots are not database-consistent for Oracle without additional steps and cannot be used for real-time replication.
- D
Increase the network bandwidth between the Regions to reduce redo log shipping lag.
Higher bandwidth reduces the time to transfer redo logs to the standby, allowing it to apply logs faster and be ready for failover sooner.
Quick Answer
The answer is to increase the network bandwidth between the Regions to reduce redo log shipping lag. Oracle Data Guard relies on continuous transport of redo data from the primary to the standby database; with only 100 Mbps throughput for a 500 GB database, the network becomes the bottleneck, causing the standby to fall behind and fail to apply logs in time during failover. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding that cross-Region Data Guard performance is directly tied to network throughput, not storage tricks—a common trap is assuming S3 or ASM can bypass the log transport delay, but they cannot accelerate the fundamental network transfer. Remember the memory tip: "Bandwidth beats backlog"—when reducing RTO for cross-Region Data Guard, always prioritize the pipe over the storage.
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. 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 running SAP NetWeaver on AWS with an Oracle database on an EC2 instance. The database uses Oracle Data Guard for disaster recovery across Regions. The primary database is in us-east-1, and the standby is in us-west-2. The database size is 500 GB and the network link between Regions has about 100 Mbps throughput. During a recent disaster recovery drill, the failover to the standby took over 2 hours because the Data Guard redo logs were not fully applied. The team wants to reduce the recovery time objective (RTO). They are considering using Amazon S3 to store archived redo logs, increasing the bandwidth, or using a different replication method. What is the MOST effective action to reduce the RTO?
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 choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Increase the network bandwidth between the Regions to reduce redo log shipping lag.
Option D is correct. Increasing the bandwidth between Regions will reduce the lag in redo log shipping, allowing the standby to apply logs more quickly and be ready faster. Option A is incorrect because storing archived logs on S3 still requires transferring them to the standby. Option B is incorrect because EBS replication does not apply to cross-Region scenarios. Option C is incorrect because ASM is a storage management layer, not a replication solution.
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.
- ✗
Configure the primary database to automatically archive redo logs to Amazon S3, and have the standby download them from S3.
Why it's wrong here
This still involves data transfer over the network and may not reduce the time to apply logs.
- ✗
Use Oracle Automatic Storage Management (ASM) to mirror data across Regions.
Why it's wrong here
ASM is for local storage management, not cross-Region replication.
- ✗
Replace Oracle Data Guard with Amazon EBS snapshot replication across Regions.
Why it's wrong here
EBS snapshots are not database-consistent for Oracle without additional steps and cannot be used for real-time replication.
- ✓
Increase the network bandwidth between the Regions to reduce redo log shipping lag.
Why this is correct
Higher bandwidth reduces the time to transfer redo logs to the standby, allowing it to apply logs faster and be ready for failover sooner.
Clue confirmation
The clue word "primary" in the question point toward this answer.
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 PAS-C01 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Technology — This question tests Technology — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Increase the network bandwidth between the Regions to reduce redo log shipping lag. — Option D is correct. Increasing the bandwidth between Regions will reduce the lag in redo log shipping, allowing the standby to apply logs more quickly and be ready faster. Option A is incorrect because storing archived logs on S3 still requires transferring them to the standby. Option B is incorrect because EBS replication does not apply to cross-Region scenarios. Option C is incorrect because ASM is a storage management layer, not a replication solution.
What should I do if I get this PAS-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 PAS-C01 ACL questions on filtering logic and placement.
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?
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
This PAS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PAS-C01 exam.
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