SOA-C02 Dumps with Practice Exam Questions Answers

NAT Gateway Setup:

A NAT gateway allows instances in a private subnet to connect to the internet or other AWS services, but prevents the internet from initiating a connection with those instances.

Steps:

Go to the AWS Management Console.

Navigate to VPC and select "NAT Gateways."

Create a NAT gateway in the public subnet of each Availability Zone.

Allocate an Elastic IP address to each NAT gateway.

Update the route tables for the private subnets to route internet-bound traffic to the NAT gateways.

Step-by-Step Explanation:

Understand the Problem:

The application read performance degrades when user connections exceed 200.

Need to automatically scale the database based on user demand.

Analyze the Requirements:

Implement auto scaling based on user connections to ensure optimal performance.

Evaluate the Options:

Option A: Migrate to a new Aurora multi-master DB cluster.

Multi-master clusters provide read and write scalability but may require significant changes to the application.

Option B: Modify the DB cluster to serverless mode.

Aurora Serverless provides automatic scaling, but it is more suitable for variable workloads with unpredictable demand.

Option C: Create an auto scaling policy with a target metric of 195 DatabaseConnections.

This directly addresses the need to scale based on user connections.

Auto scaling can add or remove replicas to maintain optimal performance.

Option D: Increase the Aurora Replica instance size.

This may improve performance but does not address scalability for sudden increases in user connections.

Select the Best Solution:

Option C: Creating an auto scaling policy with a target metric of 195 DatabaseConnections ensures the DB cluster scales automatically to handle increased load.

References:

Amazon Aurora Auto Scaling

Scaling Aurora DB Instances

Auto scaling based on DatabaseConnections ensures the Aurora DB cluster maintains optimal performance as user demand fluctuates.

Amazon CloudFront is a global content delivery network (CDN) service that delivers your content with low latency and high transfer speeds. By distributing the static content (images and videos) to CloudFront edge locations, users in the United States and Europe can access the content from the nearest edge location, significantly improving the load times.

Create a CloudFront Distribution:

Open the Amazon CloudFront console at Amazon CloudFront Console.

Choose Create Distribution and select Web.

Specify the S3 bucket as the origin where your static content is stored.

Configure Distribution Settings:

Configure the settings, such as cache behaviors and SSL/TLS settings.

Optionally, configure additional features like geo-restriction and logging.

Update DNS Configuration:

Update your DNS records to point to the CloudFront distribution. This can be done via Amazon Route 53 or your DNS provider.

Monitor Performance:

Use CloudFront reports and logs to monitor the performance and adjust configurations if needed.

References:

Amazon CloudFront Overview

Creating a CloudFront Distribution

If an EC2 instance does not appear in the Systems Manager Session Manager list, it is likely because the instance does not have an attached IAM role that allows Session Manager to connect.

Attach IAM Role with Necessary Permissions:

Ensure the EC2 instance has an IAM role attached with the AmazonSSMManagedInstanceCore policy.

Steps to Attach IAM Role:

Open the EC2 console, select the instance, and choose "Actions" -> "Instance Settings" -> "Attach/Replace IAM Role."

Select or create an IAM role with the necessary permissions for Session Manager.

Permissions for Session Manager:

The AmazonSSMManagedInstanceCore policy provides the required permissions for the Systems Manager agent to interact with the Systems Manager service.

References:

Session Manager Prerequisites

Attach an IAM Role to an Instance

Step-by-Step Explanation:

Understand the Problem:

The threat of ransomware encrypting and holding company data hostage.

Need to protect an Amazon S3 bucket.

Analyze the Requirements:

Ensure that data in the S3 bucket is protected against unauthorized encryption or deletion.

Evaluate the Options:

Option A: Deny Post, Put, and Delete on the bucket.

Denying these actions would prevent any uploads or modifications to the bucket, making it unusable.

Option B: Enable server-side encryption on the bucket.

Server-side encryption protects data at rest but does not prevent the encryption of data by ransomware.

Option C: Enable Amazon S3 versioning on the bucket.

S3 versioning keeps multiple versions of an object in the bucket. If a file is overwritten or encrypted by ransomware, previous versions of the file can still be accessed.

Option D: Enable snapshots on the bucket.

Amazon S3 does not have a snapshot feature; this option is not applicable.

Select the Best Solution:

Option C: Enabling Amazon S3 versioning is the best solution as it allows access to previous versions of objects, providing protection against ransomware encryption by retaining prior, unencrypted versions.

References:

Amazon S3 Versioning

Best Practices for Protecting Data with Amazon S3

Enabling S3 versioning ensures that previous versions of objects are preserved, providing a safeguard against ransomware by allowing recovery of unencrypted versions of data.