- A
HANA System Replication in synchronous mode
Why wrong: Synchronous mode over long distance causes high latency and performance issues.
- B
Log shipping to an S3 bucket in DR region
Why wrong: Log shipping may not provide automatic failover and RTO may exceed 4 hours.
- C
HANA System Replication in asynchronous mode
Async replication over long distance meets RPO of 15 minutes and RTO of 4 hours.
- D
EBS snapshot replication to DR region using AWS Backup
Why wrong: EBS snapshots are periodic; RPO likely >15 minutes.
Question 649 of 1,733
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. 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.
A company is designing a disaster recovery (DR) strategy for SAP on AWS. The primary region is us-east-1 and the DR region is us-west-2. The SAP HANA database is 2 TB. The recovery point objective (RPO) is 15 minutes and the recovery time objective (RTO) is 4 hours. Which solution meets these requirements most cost-effectively?
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
✓
HANA System Replication in asynchronous mode
HANA System Replication in asynchronous mode meets the RPO of 15 minutes and RTO of 4 hours for a 2 TB database while being more cost-effective than synchronous replication, which would introduce latency and require high-bandwidth, low-latency links. Asynchronous replication allows the secondary system to lag slightly behind the primary, which is acceptable for a 15-minute RPO, and avoids the performance impact on the primary system that synchronous mode would impose over a long-distance link.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
HANA System Replication in synchronous mode
Why it's wrong here
Synchronous mode over long distance causes high latency and performance issues.
- ✗
Log shipping to an S3 bucket in DR region
Why it's wrong here
Log shipping may not provide automatic failover and RTO may exceed 4 hours.
- ✓
HANA System Replication in asynchronous mode
Why this is correct
Async replication over long distance meets RPO of 15 minutes and RTO of 4 hours.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
EBS snapshot replication to DR region using AWS Backup
Why it's wrong here
EBS snapshots are periodic; RPO likely >15 minutes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The key trap is the assumption that synchronous replication is always better for low RPO. However, over long distances (e.g., us-east-1 to us-west-2), synchronous mode introduces unacceptable latency and high bandwidth costs. Asynchronous HANA System Replication provides a cost-effective solution that meets the 15-minute RPO and 4-hour RTO without impacting primary system performance.
Detailed technical explanation
How to think about this question
HANA System Replication uses a log-based replication mechanism where the primary system ships redo log entries to the secondary system. In asynchronous mode, the primary commits a transaction without waiting for the secondary to acknowledge receipt, which allows the secondary to lag by a configurable amount (e.g., up to 15 minutes). The RTO of 4 hours is achievable because the secondary can be promoted to primary quickly (typically under 30 minutes for a 2 TB database) and the remaining time accounts for any log replay and application startup. Under the hood, HANA uses a 'full sync' or 'sync' mode for synchronous replication, which requires the secondary to confirm log writes before the primary commits, causing significant latency over long distances.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Technology — This question tests Technology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: HANA System Replication in asynchronous mode — HANA System Replication in asynchronous mode meets the RPO of 15 minutes and RTO of 4 hours for a 2 TB database while being more cost-effective than synchronous replication, which would introduce latency and require high-bandwidth, low-latency links. Asynchronous replication allows the secondary system to lag slightly behind the primary, which is acceptable for a 15-minute RPO, and avoids the performance impact on the primary system that synchronous mode would impose over a long-distance link.
What should I do if I get this PAS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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