Question 1:
You have launched an EC2 instance that will host a NodeJS application. After installing all the required software and configured your application, you noted down the EC2 instance public IPv4 so you can access it. Then, you stopped and then started your EC2 instance to complete the application configuration. After restart, you can't access the EC2 instance, and you found that the EC2 instance public IPv4 has been changed. What should you do to assign a fixed public IPv4 to your EC2 instance?
Correct Answer: (1) Allocating an Elastic IP provides a static public IPv4 address that remains associated with your EC2 instance, even when it is stopped and restarted, ensuring uninterrupted access to your application. This approach is important for maintaining reliable connectivity without the changes that occur with regular public IP addresses.
Question 2:
You have an application performing big data analysis hosted on a fleet of EC2 instances. You want to ensure your EC2 instances have the highest networking performance while communicating with each other. Which EC2 Placement Group should you choose?
Correct Answer: (2) It ensures that your EC2 instances are physically located close together, which enhances networking performance and reduces latency, making it ideal for high-performance applications like big data analysis. This setup allows your instances to communicate more efficiently, aligning perfectly with your application's needs.
Question 3:
You have a critical application hosted on a fleet of EC2 instances in which you want to achieve maximum availability when there's an AZ failure. Which EC2 Placement Group should you choose?
Correct Answer: (3) It effectively ensures that your EC2 instances are distributed across different physical hardware in multiple Availability Zones (AZs), maximizing availability during an AZ failure. This configuration provides redundancy and reduces the risk of downtime for your critical application.
Question 4:
Elastic Network Interface (ENI) can be attached to EC2 instances in another AZ.
Correct Answer: (2) Elastic Network Interfaces (ENIs) are restricted to a specific Availability Zone (AZ) and cannot be attached to EC2 instances in other AZs, ensuring that the networking structure remains stable and localized within that zone. This understanding is essential for correctly managing resources in AWS.
Question 5:
The following are true regarding EC2 Hibernate, EXCEPT:
Correct Answer: (1) EC2 Hibernate to function, the root volume must be an EBS volume that is encrypted. This understanding is crucial as it aligns with knowing the specific requirements for using hibernation with AWS EC2 instances.
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