- A
Increase the Redis node type to handle the load and rely on the ElastiCache maintenance window.
Why wrong: Patching still causes downtime regardless of node size.
- B
Use a blue/green deployment strategy by creating a new Redis cluster and switching the application endpoint.
Why wrong: ElastiCache does not natively support blue/green deployments.
- C
Deploy the Redis cluster with Multi-AZ and automatic failover enabled across two Availability Zones.
Multi-AZ with automatic failover provides high availability during patching.
- D
Deploy the Redis cluster as a single node in one Availability Zone and take regular snapshots.
Why wrong: Single node will be unavailable during patching.
Question 541 of 1,746
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 highly available web application on AWS. The application consists of an Application Load Balancer (ALB) that distributes traffic to EC2 instances in an Auto Scaling group across multiple Availability Zones. The application state is stored in an Amazon ElastiCache for Redis cluster. The company wants to minimize downtime during patching of the Redis cluster. What should the company do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
✓
Deploy the Redis cluster with Multi-AZ and automatic failover enabled across two Availability Zones.
Option C is correct because deploying ElastiCache for Redis with Multi-AZ and automatic failover enabled ensures that if the primary node fails or requires patching, a read replica in a different Availability Zone is automatically promoted to primary, minimizing downtime. This aligns with the requirement for high availability during patching, as ElastiCache handles failover transparently without manual intervention.
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.
- ✗
Increase the Redis node type to handle the load and rely on the ElastiCache maintenance window.
Why it's wrong here
Patching still causes downtime regardless of node size.
- ✗
Use a blue/green deployment strategy by creating a new Redis cluster and switching the application endpoint.
Why it's wrong here
ElastiCache does not natively support blue/green deployments.
- ✓
Deploy the Redis cluster with Multi-AZ and automatic failover enabled across two Availability Zones.
Why this is correct
Multi-AZ with automatic failover provides high availability during patching.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Deploy the Redis cluster as a single node in one Availability Zone and take regular snapshots.
Why it's wrong here
Single node will be unavailable during patching.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse scaling (Option A) or manual migration strategies (Option B) with the native high-availability feature of ElastiCache Multi-AZ, which is specifically designed to handle patching and failures with minimal downtime.
Detailed technical explanation
How to think about this question
ElastiCache for Redis Multi-AZ uses a synchronous replication mechanism between the primary and replica nodes in different Availability Zones. During patching, AWS performs a controlled failover by promoting a replica to primary, typically completing within seconds, and the DNS endpoint remains unchanged. This is governed by the Redis replication protocol, which ensures data consistency as long as the replica is up-to-date; however, in rare cases of asynchronous replication lag, a small amount of data may be lost, which is acceptable for many stateful web applications.
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
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Design for New Solutions — study guide chapter
Learn the concepts, then practise the questions
- →
Design for New Solutions practice questions
Targeted practice on this topic area only
- →
All SAP-C02 questions
1,746 questions across all exam domains
- →
AWS Certified Solutions Architect Professional SAP-C02 study guide
Full concept coverage aligned to exam objectives
- →
SAP-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related SAP-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Design Solutions for Organizational Complexity practice questions
Practise SAP-C02 questions linked to Design Solutions for Organizational Complexity.
Design for New Solutions practice questions
Practise SAP-C02 questions linked to Design for New Solutions.
Continuous Improvement for Existing Solutions practice questions
Practise SAP-C02 questions linked to Continuous Improvement for Existing Solutions.
Accelerate Workload Migration and Modernization practice questions
Practise SAP-C02 questions linked to Accelerate Workload Migration and Modernization.
SAA-C03 VPC practice questions
Practise SAP-C02 questions linked to SAA-C03 VPC.
SAA-C03 S3 lifecycle policy questions
Practise SAP-C02 questions linked to SAA-C03 S3 lifecycle policy questions.
SAA-C03 RDS Multi-AZ questions
Practise SAP-C02 questions linked to SAA-C03 RDS Multi-AZ questions.
SAA-C03 IAM policy practice questions
Practise SAP-C02 questions linked to SAA-C03 IAM policy.
SAA-C03 Route 53 failover questions
Practise SAP-C02 questions linked to SAA-C03 Route 53 failover questions.
SAA-C03 CloudFront practice questions
Practise SAP-C02 questions linked to SAA-C03 CloudFront.
SAA-C03 NAT gateway questions
Practise SAP-C02 questions linked to SAA-C03 NAT gateway questions.
SAA-C03 VPC endpoint questions
Practise SAP-C02 questions linked to SAA-C03 VPC endpoint questions.
Practice this exam
Start a free SAP-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this SAP-C02 question test?
Design for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy the Redis cluster with Multi-AZ and automatic failover enabled across two Availability Zones. — Option C is correct because deploying ElastiCache for Redis with Multi-AZ and automatic failover enabled ensures that if the primary node fails or requires patching, a read replica in a different Availability Zone is automatically promoted to primary, minimizing downtime. This aligns with the requirement for high availability during patching, as ElastiCache handles failover transparently without manual intervention.
What should I do if I get this SAP-C02 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: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More SAP-C02 practice questions
- A company wants to automate the migration of on-premises servers to AWS. The migration plan includes discovery, assessme…
- A company is using AWS Organizations with hundreds of accounts. The central IT team needs to deploy a common set of AWS…
- A multinational company operates a multi-account AWS environment using AWS Organizations. The security team needs to enf…
- A company has a multi-account AWS environment with a centralized logging account. The security team needs to analyze VPC…
- A company has multiple AWS accounts and wants to centralize logging of all API calls. Which TWO services should be used…
- Match each AWS compute service to its use case.
Last reviewed: Jul 4, 2026
This SAP-C02 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 SAP-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.