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Amazon AWS-Solutions-Architect-Professional Exam Syllabus Topics:

Section	Weight	Objectives
Accelerate Workload Migration and Modernization	20%	- Modernization using cloud-native services - Migration strategies (rehost, replatform, refactor) - Data and application migration planning
Design for New Solutions	29%	- Storage and database selection for workloads - Application architecture design on AWS services - High availability and fault-tolerant architectures
Design Solutions for Organizational Complexity	26%	- Multi-account architecture design - Network connectivity strategies (hybrid and multi-VPC) - Identity and access management at scale
Continuous Improvement for Existing Solutions	25%	- Optimization of existing workloads - Performance tuning and cost optimization - Security and resilience improvements

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Amazon AWS Certified Solutions Architect - Professional Sample Questions (Q344-Q349):

NEW QUESTION # 344
A medical company is running a REST API on a set of Amazon EC2 instances. The EC2 instances run in an Auto Scaling group behind an Application Load Balancer (ALB). The ALB runs in three public subnets, and the EC2 instances run in three private subnets. The company has deployed an Amazon CloudFront distribution that has the AL8 as the only origin.
Which solution should a solutions architect recommend to enhance the origin security?

A. Configure AWS Shield Advanced. Create a security group policy to allow connections from CloudFront service IP address ranges. Add the policy to AWS Shield Advanced, and attach the policy to the ALB.
B. Store a random string in AWS Systems Manager Parameter Store. Configure Parameter Store automatic rotation for the string. Configure CloudFront to inject the random siring as a custom HTTP header for the origin request. Inspect the value of the custom HTTP header, and block access in the ALB.
C. Store a random string in AWS Secrets Manager. Create an AWS Lambda (unction for automatic secret rotation. Configure CloudFront to inject the random string as a custom HTTP header for the origin request. Create an AWS WAF web ACL rule with a string match rule for the custom header. Associate the web ACL with the ALB.
D. Create an AWS WAF web ACL rule with an IP match condition of the CloudFront service IP address ranges. Associate the web ACL with the ALB. Move the ALB into the three private subnets.

Answer: A

Explanation:
Explanation
https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-suspend-resume-processes.html it shows For Amazon EC2 Auto Scaling, there are two primary process types: Launch and Terminate. The Launch process adds a new Amazon EC2 instance to an Auto Scaling group, increasing its capacity. The Terminate process removes an Amazon EC2 instance from the group, decreasing its capacity. HealthCheck process for EC2 autoscaling is not a primary process! It is a process along with the following AddToLoadBalancer AlarmNotification AZRebalance HealthCheck InstanceRefresh ReplaceUnhealthy ScheduledActions From the requirements, Some EC2 instances are now being marked as unhealthy and are being terminated. Application is running at reduced capacity not because instances are marked unhealthy but because they are being terminated.
https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-suspend-resume-processes.html#choosing-suspend-re

NEW QUESTION # 345
A company runs a legacy system on a single m4.2xlarge Amazon EC2 instance with Amazon EBS2 storage. The EC2 instance runs both the web server and a self-managed Oracle database.
A snapshot is made of the EBS volume every 12 hours, and an AMI was created from the fully configured EC2 instance. A recent event that terminated the EC2 instance led to several hours of downtime. The application was successfully launched from the AMI, but the age of the EBS snapshot and the repair of the database resulted in the loss of 8 hours of data. The system was also down for 4 hours while the Systems Operators manually performed these processes.
What architectural changes will minimize downtime and reduce the chance of lost data?

A. Run the application on m4.2xlarge EC2 instances behind an Elastic Load Balancer/Application Load Balancer.
Run the EC2 instances in an Auto Scaling group access multiple Availability Zones with a minimum instance count of one.
Migrate the database to an Amazon RDS Oracle Multi-AZ DB instance.
B. Increase the web server instance count to two m4.xlarge instances and use Amazon Route 53 round-robin load balancing to spread the load.
Enable Route 53 health checks on the web servers.
Migrate the database to an Amazon RDS Oracle Multi-AZ DB instance.
C. Run the application on m4.xlarge EC2 instances behind an Elastic Load Balancer/Application Load Balancer.
Run the EC2 instances in an Auto Scaling group across multiple Availability Zones with a minimum instance count of two.
Migrate the database to an Amazon RDS Oracle Multi-AZ DB instance.
D. Create an Amazon CloudWatch alarm to automatically recover the instance.
Create a script that will check and repair the database upon reboot.
Subscribe the Operations team to the Amazon SNS message generated by the CloudWatch alarm.

Answer: C

NEW QUESTION # 346
An administrator is using Amazon CloudFormation to deploy a three tier web application that consists of a
web tier and application tier that will utilize Amazon DynamoDB for storage when creating the
CloudFormation template which of the following would allow the application instance access to the
DynamoDB tables without exposing API credentials?

A. Use the Parameter section in the Cloud Formation template to nave the user input Access and Secret
Keys from an already created IAM user that has me permissions required to read and write from the
required DynamoDB table.
B. Create an identity and Access Management user in the CloudFormation template that has permissions
to read and write from the required DynamoDB table, use the GetAtt function to retrieve the Access and
secret keys and pass them to the application instance through user-data.
C. Create an Identity and Access Management Role that has the required permissions to read and write
from the required DynamoDB table and associate the Role to the application instances by referencing an
instance profile.
D. Create an Identity and Access Management Role that has the required permissions to read and write
from the required DynamoDB table and reference the Role in the instance profile property of the
application instance.

Answer: D

NEW QUESTION # 347
A company is designing a new highly available web application on AWS. The application requires consistent and reliable connectivity from the application servers in AWS to a backend REST API hosted in the company's on-premises environment. The backend connection between AWS and on-premises will be routed over an AWS Direct Connect connection through a private virtual interface. Amazon Route 53 will be used to manage private DNS records for the application to resolve the IP address on the backend REST API.
Which design would provide a reliable connection to the backend API?

A. Install a second Direct Connect connection from a different network carrier and attach it to the same virtual private gateway as the first Direct Connect connection.
B. Implement at least two backend endpoints for the backend REST API, and use Route 53 health checks to monitor the availability of each backend endpoint and perform DNS-level failover.
C. Install a second cross connect for the same Direct Connect connection from the same network carrier, and join both connections to the same link aggregation group (LAG) on the same private virtual interface.
D. Create an IPSec VPN connection routed over the public internet from the on-premises data center to AWS and attach it to the same virtual private gateway as the Direct Connect connection.

Answer: A

Explanation:
Explanation
https://aws.amazon.com/answers/networking/aws-single-data-center-ha-network-connectivity/

NEW QUESTION # 348
A Solutions Architect is designing a service that must have four Amazon EC2 instances running between 8
AM and 6 PM daily. The service requires one EC2 instance outside of those hours.
What is the MOST cost-effective way to provide enough compute?

A. Use one Amazon EC2 On-Demand instance and use an Auto Scaling Group scheduled action to add
three EC2 Spot instances at 7:30 AM and remove three instances at 6:10 PM.
B. Use one Amazon EC2 Reserved Instance and use an Auto Scaling group to add and remove EC2
instances based on CPU utilization.
C. Use one Amazon EC2 On-Demand instance and use an Auto Scaling group to add and remove EC2
instances based on CPU utilization.
D. Use one Amazon EC2 Reserved Instance and use an Auto Scaling Group scheduled action to add
three EC2 On-Demand instances at 7:30 AM and remove three instances at 6:10 PM.

Answer: C

NEW QUESTION # 349
......

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