Table of Contents
Question
A company wants to run a NoSQL database on Amazon EC2 instances. Which task is the responsibility of AWS in this scenario?
A. Update the guest operating system of the EC2 instances.
B. Maintain high availability at the database layer.
C. Patch the physical infrastructure that hosts the EC2 instances.
D. Configure the security group firewall.
Answer
C. Patch the physical infrastructure that hosts the EC2 instances.
Explanation
The correct answer is C. Patch the physical infrastructure that hosts the EC2 instances.
Amazon EC2 is a service that provides scalable and secure compute capacity in the cloud. You can launch virtual servers, called instances, that run your applications and databases. You can choose from different types of instances that vary in performance, memory, storage, and network capacity. You can also customize your instances with different operating systems, software, and configurations.
When you run a NoSQL database on Amazon EC2 instances, you are responsible for managing the database layer and the guest operating system of the instances. This means that you need to perform tasks such as:
- Update the guest operating system of the EC2 instances. This is option A, which is incorrect. You need to keep your operating system up to date with the latest security patches and bug fixes. You can use AWS Systems Manager or other tools to automate this process.
- Maintain high availability at the database layer. This is option B, which is incorrect. You need to ensure that your database can handle failures and recover quickly. You can use Amazon EBS or Amazon S3 for data persistence and backup. You can also use Amazon EC2 Auto Scaling or Amazon EC2 Spot Instances for scaling and cost optimization.
- Configure the security group firewall. This is option D, which is incorrect. You need to protect your instances from unauthorized access and attacks. You can use security groups to control the inbound and outbound traffic to your instances. You can also use AWS WAF or AWS Shield for web application firewall and DDoS protection.
AWS is responsible for managing the physical infrastructure that hosts the EC2 instances. This means that AWS performs tasks such as:
- Patch the physical infrastructure that hosts the EC2 instances. This is option C, which is correct. AWS ensures that the hardware and firmware of the servers, routers, switches, and other devices are updated and secure. AWS also handles the power, cooling, networking, and security of the data centers.
- Provide fault tolerance and redundancy at the infrastructure layer. AWS ensures that the EC2 instances are distributed across multiple Availability Zones within a Region. Availability Zones are isolated locations that have independent power, cooling, and network connectivity. This reduces the impact of failures and increases availability.
- Monitor and maintain the performance and health of the infrastructure layer. AWS monitors the metrics and events of the infrastructure layer and takes corrective actions when necessary. AWS also provides tools such as Amazon CloudWatch or AWS Trusted Advisor for you to monitor and optimize your resources.
Therefore, the only task that can only be performed by AWS in this scenario is patching the physical infrastructure that hosts the EC2 instances.
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