- A
Amazon RDS Multi-AZ
Correct. Amazon RDS Multi-AZ automatically provisions and maintains a synchronous standby replica in a different Availability Zone. If the primary instance fails, Amazon RDS automatically fails over to the standby, providing high availability. It also handles automated backups, patching, and replication.
- B
Amazon RDS Single-AZ
Why wrong: Incorrect. Amazon RDS Single-AZ runs only one instance in a single Availability Zone. It does not have automatic failover; if the instance fails, downtime occurs until a new instance is launched from a backup.
- C
Amazon DynamoDB Global Tables
Why wrong: Incorrect. Amazon DynamoDB is a NoSQL key-value and document database. The question specifies a relational database. DynamoDB does not support relational queries or SQL.
- D
Amazon S3
Why wrong: Incorrect. Amazon S3 is an object storage service, not a relational database. It cannot process SQL queries or provide database failover. It is used for storing and retrieving data objects.
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: amazon RDS Multi-AZ provides automatic failover to a standby replica.. 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 runs a web application on Amazon EC2 instances that connect to a relational database. The application requires high database availability so that if the primary database instance fails, a standby instance automatically takes over without manual intervention. The company wants to minimize administrative overhead for database patching, backups, and replication. Which AWS service should the company use to meet these requirements?
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.
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
Amazon RDS Multi-AZ
Amazon RDS Multi-AZ provides high availability by automatically provisioning and maintaining a synchronous standby replica in a different Availability Zone. If the primary database instance fails, Amazon RDS automatically fails over to the standby, ensuring minimal downtime without manual intervention. Additionally, RDS handles patching, backups, and replication automatically, reducing administrative overhead.
Key principle: Amazon RDS Multi-AZ provides automatic failover to a standby replica.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Amazon RDS Multi-AZ
Why this is correct
Correct. Amazon RDS Multi-AZ automatically provisions and maintains a synchronous standby replica in a different Availability Zone. If the primary instance fails, Amazon RDS automatically fails over to the standby, providing high availability. It also handles automated backups, patching, and replication.
Clue confirmation
The clue words "primary", "minimum / minimize" in the question point toward this answer.
Related concept
Amazon RDS Multi-AZ provides automatic failover to a standby replica.
- ✗
Amazon RDS Single-AZ
Why it's wrong here
Incorrect. Amazon RDS Single-AZ runs only one instance in a single Availability Zone. It does not have automatic failover; if the instance fails, downtime occurs until a new instance is launched from a backup.
- ✗
Amazon DynamoDB Global Tables
Why it's wrong here
Incorrect. Amazon DynamoDB is a NoSQL key-value and document database. The question specifies a relational database. DynamoDB does not support relational queries or SQL.
- ✗
Amazon S3
Why it's wrong here
Incorrect. Amazon S3 is an object storage service, not a relational database. It cannot process SQL queries or provide database failover. It is used for storing and retrieving data objects.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Amazon RDS Multi-AZ with Amazon DynamoDB Global Tables, assuming both provide high availability for relational databases, but DynamoDB is NoSQL and does not support relational queries or the same failover model.
Detailed technical explanation
How to think about this question
Amazon RDS Multi-AZ uses synchronous replication to maintain a standby replica in a different Availability Zone, ensuring zero data loss during failover. The failover process is automatic and typically completes within 1-2 minutes, with the DNS record updated to point to the standby instance. In a real-world scenario, Multi-AZ is ideal for production workloads where database availability is critical, such as e-commerce platforms or financial applications, and it offloads administrative tasks like patching and backups to AWS.
KKey Concepts to Remember
- Amazon RDS Multi-AZ provides automatic failover to a standby replica.
- The standby replica is synchronously replicated in a different Availability Zone.
- It minimizes administrative overhead for patching, backups, and replication.
- Failover is automatic and requires no manual intervention.
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
Amazon RDS Multi-AZ provides automatic failover to a standby replica.
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 amazon RDS Multi-AZ provides automatic failover to a standby replica., then practise related CLF-C02 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Amazon RDS Multi-AZ provides automatic failover to a standby replica..
What is the correct answer to this question?
The correct answer is: Amazon RDS Multi-AZ — Amazon RDS Multi-AZ provides high availability by automatically provisioning and maintaining a synchronous standby replica in a different Availability Zone. If the primary database instance fails, Amazon RDS automatically fails over to the standby, ensuring minimal downtime without manual intervention. Additionally, RDS handles patching, backups, and replication automatically, reducing administrative overhead.
What should I do if I get this CLF-C02 question wrong?
Review amazon RDS Multi-AZ provides automatic failover to a standby replica., then practise related CLF-C02 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "primary", "minimum / minimize". 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?
Amazon RDS Multi-AZ provides automatic failover to a standby replica.
About these practice questions
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Last reviewed: Jun 11, 2026
This CLF-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 CLF-C02 exam.
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