Pass the Amazon Web Services AWS Certified Associate SOA-C02 Questions and answers with CertsForce

To resolve the issue where mobile users are being served the desktop version of the website, you need to forward the User-Agent header from CloudFront to your origin (ALB). This allows the origin to detect the type of device and serve the appropriate content.

Login to AWS Management Console:

Open the CloudFront console at Amazon CloudFront Console.

Select the Distribution:

Choose the CloudFront distribution you want to modify.

Update Cache Behavior Settings:

Go to the Behaviors tab.

Select the default behavior (or any specific behavior that you want to update) and choose Edit.

Forward Headers:

Under Cache Key and Origin Requests, choose Origin Request Policy.

Select Create Policy and include the User-Agent header in the policy.

Save the policy and apply it to the cache behavior.

This configuration ensures that the User-Agent header is forwarded to the origin, enabling it to serve different content based on the device type.

Configuring CloudFront to Forward Headers

Creating CloudFront Cache Behaviors

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-choosing-alias-non-alias.html

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-to-elb-load-balancer.html

To provide the ability to recover deleted EBS snapshots for a specified period, creating a Recycle Bin retention rule for EBS snapshots is the appropriate solution.

Recycle Bin:

The Recycle Bin for Amazon EBS snapshots allows you to recover snapshots that were deleted within a specified retention period.

Creating a Retention Rule:

Open the Amazon Data Lifecycle Manager console.

Create a new Recycle Bin retention rule for EBS snapshots and specify the desired retention period.

Amazon EBS Recycle Bin

Aurora Auto Scaling:

Aurora Auto Scaling adjusts the number of Aurora Replicas in response to changes in connectivity or workload.

Steps:

Go to the AWS Management Console.

Navigate to RDS and select the Aurora cluster.

Under "Actions," choose "Add Aurora Replica" to initially add replicas if needed.

Go to the "Auto Scaling" section and create an auto scaling policy.

Set the target value for the DatabaseConnections metric to 195.

Define the minimum and maximum number of replicas.

Save the configuration.

This ensures that the Aurora cluster scales automatically when the number of connections approaches the threshold, improving read performance.

Aurora Auto Scaling

Scenario Analysis:

The EC2 instance is inaccessible through RDP due to misconfigured Windows Firewall settings.

The boot volume is encrypted, which restricts direct modification without proper mounting and decryption tools.

The goal is to back up the instance and regain RDP connectivity.

Why Option D is Correct:

AWS provides EC2Rescue for Windows Server as a tool to resolve common connectivity and boot issues for Windows EC2 instances.

The process of detaching the boot volume and attaching it to another instance ensures that the misconfigured instance does not impede further configuration.

The working instance acts as a recovery environment where EC2Rescue can be run to modify the Windows Firewall settings and allow RDP access.

Steps to Resolve the Issue (Following Option D):

Step 1: Stop the instance.In the EC2 console, select the affected instance and stop it to ensure safe operations.

Step 2: Detach the boot volume.Navigate to the instance's storage section, identify the boot volume (usually /dev/sda1), and detach it.

Step 3: Attach the boot volume to a recovery instance.

Identify a working instance that has EC2Rescue installed.

Attach the detached boot volume to the recovery instance as a secondary volume.

Step 4: Run EC2Rescue to fix Windows Firewall settings.

Log in to the recovery instance and launch EC2Rescue.

Select the attached secondary volume and run diagnostics or select specific repairs (e.g., enabling RDP access in Windows Firewall settings).

Step 5: Detach the boot volume from the recovery instance.After applying the fix, safely detach the volume from the recovery instance.

Step 6: Reattach the boot volume to the original instance.Attach the volume back to the original instance as its boot volume.

Step 7: Start the instance and verify connectivity.Start the original instance and attempt to connect via RDP using the instance's public or private IP (depending on the network configuration).

AWS References and Best Practices:

EC2Rescue for Windows Server:Official documentation: EC2Rescue

Encrypted EBS Volumes:Ensure the proper use of the same AWS KMS key when attaching encrypted volumes to other instances. Reference: EBS Encryption

Backup Before Modifications:AWS recommends creating snapshots of EBS volumes before making changes. Reference: Creating EBS Snapshots

Why Other Options Are Incorrect:

Option A: AWS does not support disabling encryption for EBS volumes directly. Additionally, creating a new key pair does not address the firewall misconfiguration.

Option B: Amazon Inspector does not provide tools for modifying Windows Firewall settings. It is primarily used for vulnerability assessments.

Option C: Disabling encryption is not supported, and Amazon Inspector cannot fix firewall issues.

Aurora Global Databases are designed for cross-Region disaster recovery with very low RPO, meeting the 20-second requirement. Setting up Aurora as a global database with the correct configuration ensures low-latency replication and rapid failover, making it ideal for compliance with strict disaster recovery requirements.

Step-by-Step Explanation:

Understand the Problem:

Ensure all users in the organization have read-level access to a specific S3 bucket.

The data should not be accessible outside the organization.

Analyze the Requirements:

Grant read access to users within the organization.

Prevent access from outside the organization.

Evaluate the Options:

Option A: Specify "*" as the principal and PrincipalOrgId as a condition.

This grants access to all AWS principals but restricts it to those within the specified organization using the PrincipalOrgId condition.

Option B: Specify all account numbers as the principal.

This is impractical for a large organization and requires constant updates if accounts are added or removed.

Option C: Specify PrincipalOrgId as the principal.

The PrincipalOrgId condition must be used within a policy, not as a principal.

Option D: Specify the organization's management account as the principal.

This grants access only to the management account, not to all users within the organization.

Select the Best Solution:

Option A: Using "*" as the principal with the PrincipalOrgId condition ensures all users within the organization have the required access while preventing external access.

Amazon S3 Bucket Policies

AWS Organizations Policy Examples

Using "*" as the principal with the PrincipalOrgId condition efficiently grants read access to the S3 bucket for all users within the organization.

To allow the EC2 instance in the private subnet to establish a secure connection to an external web server, follow these steps:

Modify Security Group:

Add an outbound rule to the security group of the EC2 instance with the following parameters:

Type: HTTPS

Destination: 0.0.0.0/0

This allows outbound HTTPS traffic to the internet.

To provide both incoming and outgoing connectivity to the internet for EC2 instances, you need to ensure that the instances are in a subnet that has a route to an internet gateway. Here are the required steps:

Create an Internet Gateway:

Open the Amazon VPC console at Amazon VPC Console.

In the navigation pane, choose Internet Gateways.

Choose Create Internet Gateway.

Enter a name for the internet gateway and choose Create.

Attach the internet gateway to your VPC by selecting the created internet gateway, then choosing Actions, and Attach to VPC.

Modify Route Table:

In the Amazon VPC console, go to the Route Tables section.

Select the route table associated with the subnet where your EC2 instances are located.

Choose Edit routes and add a new route:

Destination: 0.0.0.0/0

Target: Select the internet gateway you created.

These steps ensure that the instances can send and receive traffic to and from the internet.

Creating and Attaching an Internet Gateway

Route Tables

Objective:

Receive a notification when both disk space usage and DiskReadOps exceed threshold values.

Composite Alarms:

Composite alarms allow combining multiple metric alarms into a single alarm. Notifications are triggered only when all conditions are met.

Steps to Implement:

Step 1: Install the CloudWatch agent on the EC2 instances and configure it to monitor disk space.

Step 2: Create individual metric alarms:

One for disk space usage.

One for the DiskReadOps metric.

Step 3: Create a composite alarm:

Include both metric alarms.

Configure the composite alarm to send notifications to the SNS topic when both conditions are met.

AWS References:

Composite Alarms in CloudWatch:Creating Composite Alarms

CloudWatch Agent Installation:Install CloudWatch Agent

Why Other Options Are Incorrect:

Option B: This would trigger notifications for either condition, not both simultaneously.

Option C: EBSByteBalance% is unrelated to free disk space.

Option D: Detailed monitoring is not required for composite alarms.