Practice Test
True/False: Amazon RDS Proxy can be used with MySQL and PostgreSQL databases.
- True
- False
Answer: True
Explanation: RDS Proxy is a fully managed, highly available database proxy for Amazon Relational Database Service (RDS) that supports both MySQL and PostgreSQL database engines.
Single Select: Which of the following services can be used to shield your Amazon RDS against failures and heavy loads?
- A) Amazon EC2
- B) Amazon S3
- C) Amazon RDS Proxy
- D) AWS Lambda
Answer: C) Amazon RDS Proxy
Explanation: Amazon RDS Proxy is a fully managed, highly available database that amazon built to shield your Amazon RDS database instances against failures and heavy load.
True/False: With Amazon RDS Proxy, you do not have to change any code in your existing applications.
- True
- False
Answer: True
Explanation: Amazon RDS Proxy is fully compatible with your applications using native database APIs, so you do not have to make any changes in your existing application’s code.
Multiple Select: Which AWS architectures can benefit from Amazon RDS Proxy?
- A) Serverless applications
- B) Microservice architectures
- C) High Volume applications
- D) On-premise applications
Answer: A) Serverless applications, B) Microservice architectures, C) High Volume applications
Explanation: Amazon RDS Proxy is ideal for serverless applications, microservice architectures, and high volume applications with unpredictable traffic patterns.
True/False: You can’t share a RDS Proxy among multiple Amazon RDS DB instances.
- True
- False
Answer: False
Explanation: With RDS Proxy, you have option to share a single RDS Proxy among multiple RDS DB instances.
Single Select: Which of the following is NOT a benefit of Amazon RDS Proxy?
- A) Increases database availability
- B) Reduces compute and memory resources
- C) Avoids data replication
- D) Scales application more rapidly
Answer: C) Avoids data replication
Explanation: RDS Proxy improves application scalability and resilience but it does not inherently prevent or avoid data replication.
True/False: RDS Proxy supports any kind of application that uses the MySQL or PostgreSQL protocol.
- True
- False
Answer: True
Explanation: RDS Proxy works with any application that uses MySQL or PostgreSQL compatibility.
Multiple Select: The RDS Proxy supports which of the following AWS Lambda features?
- A) Usage of the PgBouncer utility
- B) Long-lived database connections
- C) RDS Data API
- D) Amazon API Gateway service
Answer: B) Long-lived database connections, C) RDS Data API
Explanation: The RDS Proxy is highly beneficial when using AWS Lambda as it supports long-lived database connections and RDS Data API.
True/False: RDS Proxy encrypts data going over the network.
- True
- False
Answer: True
Explanation: By default, RDS Proxy encrypts data going over the network and at rest.
Single Select: Amazon RDS data API is used to connect to which of the following AWS service?
- A) Amazon EC2
- B) Amazon RDS Proxy
- C) Amazon Redshift
- D) Amazon S3
Answer: B) Amazon RDS Proxy
Explanation: Amazon RDS Data API is used to communicate with the RDS Proxy which in turn, helps connecting with any MySQL or PostgreSQL database instance.
Interview Questions
What is Amazon RDS Proxy and what does it do?
Amazon RDS Proxy is a fully managed, highly available database proxy feature for Amazon Relational Database Service (RDS) that aids to applications become more scalable, secure and resilient to database failures. It enables applications to pool and share connections established with the database, improving scalability.
How does Amazon RDS Proxy offer increased security?
Amazon RDS Proxy safeguards access to your applications’ data by enforcing AWS Identity and Access Management (IAM) and AWS Secrets Manager for managing database credentials. This results in limiting the surface area of attack and protecting against threats.
How can Amazon RDS Proxy help in managing spikes in application traffic?
Amazon RDS Proxy automatically scales to accommodate the increasing activity levels of your application and can handle thousands of simultaneous application connections to your database.
Which databases are supported by RDS Proxy?
As per the current AWS documentation, RDS Proxy supports Amazon Aurora with both MySQL and PostgreSQL compatibility, and RDS for MySQL and PostgreSQL.
How does Amazon RDS Proxy handle a failure in the database host?
In the event of a database failure, Amazon RDS Proxy automatically connects to a standby replica while preserving application connections, which reduces the application downtime.
What is the role of AWS IAM in RDS Proxy?
AWS Identity and Access Management (IAM) allows you to control access to RDS Proxy. You can create IAM roles and policies to define the actions that are allowed and disallowed.
Can I use RDS Proxy with my Serverless applications?
Yes, Amazon RDS Proxy is designed to work with AWS Lambda, Amazon Elastic Container Service (Amazon ECS), and Amazon Elastic Kubernetes Service (Amazon EKS), and essentially any application that can use MySQL or PostgreSQL client drivers.
What types of applications benefit the most from using Amazon RDS Proxy?
Applications with high traffic and bursty connection workloads, such as web-server-based applications, serverless, and multi-tier applications can benefit the most from using Amazon RDS Proxy.
What is the purpose of connection pooling in Amazon RDS Proxy?
Connection pooling provided by Amazon RDS Proxy can help applications to run more efficiently. It helps to reduce the CPU and memory footprint of these applications and improve the application’s ability to scale.
Is data traffic encrypted between application and Amazon RDS Proxy?
Yes, data traffic between the application and Amazon RDS Proxy, and RDS Proxy and the RDS database is encrypted using Transport Layer Security (TLS).
Can you monitor Amazon RDS Proxy performance?
Yes, the Amazon CloudWatch console can be used to monitor the performance metrics of Amazon RDS proxy.
Can RDS Proxy be used with databases that are not in Amazon RDS?
No, Amazon RDS Proxy is a database proxy feature specifically designed to work with databases in Amazon RDS.
Can you automate failover process with RDS Proxy?
Yes, RDS Proxy can help automate the failover process during database outages or failures without requiring changes in application logic.
How does RDS Proxy work with AWS Secrets Manager?
RDS Proxy uses AWS Secrets Manager to authenticate with your databases, enforce password rotation policies, and provide enhanced security for database credentials.
Does RDS Proxy support all AWS regions?
While RDS Proxy is progressively available in more regions over time, it’s best to check the official documentation or AWS Management console to find the most updated list of supported regions.
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