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Amazon AWS Certified Solutions Architect - Professional Sample Questions (Q233-Q238):

NEW QUESTION # 233
A company has migrated an on-premises Oracle database to an Amazon RDS for Oracle Multi-AZ DB instance in the us-east-l Region. A solutions architect is designing a disaster recovery strategy to have the database provisioned in the us-west-2 Region in case the database becomes unavailable in the us-east-1 Region. The design must ensure the database is provisioned in the us-west-2 Region in a maximum of 2 hours, with a data loss window of no more than 3 hours.
How can these requirements be met?

A. Create a multimaster read/write instances across multiple AWS Regions. Select VPCs in us-east-1 and us-west-2 to make that deployment. Keep the master read/write instance in us-west-2 available to avoid having to activate a disaster recovery environment.
B. Take automated snapshots of the database instance and copy them to us-west-2 every 3 hours.
Restore the latest snapshot to provision another database instance in us-west-2 in case the disaster recovery environment needs to be activated.
C. Select the multi-Region option to provision a standby instance in us-west-2. The standby instance will be automatically promoted to master in us-west-2 in case the disaster recovery environment needs to be created.
D. Edit the DB instance and create a read replica in us-west-2. Promote the read replica to master in us- west-2 in case the disaster recovery environment needs to be activated.

Answer: C

NEW QUESTION # 234
A company has a new application that needs to run on five Amazon EC2 instances in a single AWS Region.
The application requires high-throughput, low-latency network connections between all of the EC2 instances where the application will run. There is no requirement for the application to be fault tolerant.
Which solution will meet these requirements?

A. Launch five new EC2 instances into a partition placement group. Ensure that the EC2 instance type supports enhanced networking.
B. Launch five new EC2 instances into an Auto Scaling group in the same Availability Zone. Attach an extra elastic network interface to each EC2 instance.
C. Launch five new EC2 instances into a spread placement group. Attach an extra elastic network interface to each EC2 instance.
D. Launch five new EC2 instances into a cluster placement group. Ensure that the EC2 instance type supports enhanced networking.

Answer: C

NEW QUESTION # 235
A company hosts an application on multiple Amazon EC2 instances. The application processes messages from an Amazon SQS queue, writes for an Amazon RDS table, and deletes the message from the queue. Occasional duplicate records are found in the RDS table. The SQS queue does not contain any duplicate messages.
What should a solutions architect do to ensure messages are being processed once only?

A. Use the ChangeMessageVisibility API call to increase the visibility timeout.
B. Use the ReceiveMessage API call to set an appropriate wait time.
C. Use the AddPermission API call to add appropriate permissions.
D. Use the CreateQueue API call to create a new queue.

Answer: A

NEW QUESTION # 236
A company is using AWS Organizations with a multi-account architecture. The company's current security configuration for the account architecture includes SCPs, resource-based policies, identity-based policies, trust policies, and session policies.
A solutions architect needs to allow an IAM user in Account A to assume a role in Account B.
Which combination of steps must the solutions architect take to meet this requirement? (Select THREE.)

A. Configure the trust policy on the target role in Account B to allow the action.
B. Configure the identity-based policy on the user in Account B to allow the action.
C. Configure the identity-based policy on the user in Account A to allow the action.
D. Configure the resource-based policies to allow the action.
E. Configure the session policy to allow the action and to be passed programmatically by the GetSessionToken API operation.
F. Configure the SCP for Account A to allow the action.

Answer: A,C,D

Explanation:
Explanation: Resource-based policies are policies that you attach to a resource, such as an IAM role, to specify who can access the resource and what actions they can perform on it1. Identity-based policies are policies that you attach to an IAM user, group, or role to specify what actions they can perform on which resources2. Trust policies are special types of resource-based policies that define which principals (such as IAM users or roles) can assume a role3.
To allow an IAM user in Account A to assume a role in Account B, the solutions architect needs to do the following:
Configure the resource-based policy on the target role in Account B to allow the action sts:AssumeRole for the IAM user in Account A. This policy grants permission to the IAM user to assume the role4.
Configure the identity-based policy on the user in Account A to allow the action sts:AssumeRole for the target role in Account B. This policy grants permission to the user to perform the action of assuming the role5.
Configure the trust policy on the target role in Account B to allow the principal of the IAM user in Account A. This policy defines who can assume the role.
References:
Resource-based policies
Identity-based policies
Trust policies
Granting a user permissions to switch roles
Switching roles
[Modifying a role trust policy]

NEW QUESTION # 237
A company owns a chain of travel agencies and is running an application in the AWS Cloud. Company employees use the application to search for information about travel destinations. Destination content is updated four times each year.
Two fixed Amazon EC2 instances serve the application. The company uses an Amazon Route 53 public hosted zone with a multivalue record of travel.example.com that returns the Elastic IP addresses for the EC2 instances. The application uses Amazon DynamoDB as its primary data store. The company uses a self-hosted Redis instance as a caching solution.
During content updates, the load on the EC2 instances and the caching solution increases drastically. This increased load has led to downtime on several occasions. A solutions architect must update the application so that the application is highly available and can handle the load that is generated by the content updates.
Which solution will meet these requirements?

A. Set up Amazon ElastiCache for Redis. Update the application to use ElastiCache. Create an Auto Scaling group for the EC2 instances. Create an Amazon CloudFront distribution, and set the Auto Scaling group as an origin for the distribution. Update the Route 53 record to use a simple routing policy that targets the CloudFront distribution's DNS alias. Manually scale up EC2 instances before the content updates.
B. Set up DynamoDB Accelerator (DAX) as in-memory cache. Update the application to use DAX. Create an Auto Scaling group for the EC2 instances. Create an Amazon CloudFront distribution, and set the Auto Scaling group as an origin for the distribution. Update the Route 53 record to use a simple routing policy that targets the CloudFront distribution's DNS alias. Manually scale up EC2 instances before the content updates.
C. Set up Amazon ElastiCache for Memcached. Update the application to use ElastiCache Create an Auto Scaling group for the EC2 instances. Create an Application Load Balancer (ALB). Set the Auto Scaling group as a target for the ALB. Update the Route 53 record to use a simple routing policy that targets the ALB's DNS alias. Configure scheduled scaling for the application before the content updates.
D. Set up DynamoDB Accelerator (DAX) as in-memory cache. Update the application to use DAX. Create an Auto Scaling group for the EC2 instances. Create an Application Load Balancer (ALB). Set the Auto Scaling group as a target for the ALB. Update the Route 53 record to use a simple routing policy that targets the ALB's DNS alias. Configure scheduled scaling for the EC2 instances before the content updates.

Answer: D

Explanation:
Explanation: This option allows the company to use DAX to improve the performance and reduce the latency of the DynamoDB queries by caching the results in memory1. By updating the application to use DAX, the company can reduce the load on the DynamoDB tables and avoid throttling errors1. By creating an Auto Scaling group for the EC2 instances, the company can adjust the number of instances based on the demand and ensure high availability2. By creating an ALB, the company can distribute the incoming traffic across multiple EC2 instances and improve fault tolerance3. By updating the Route 53 record to use a simple routing policy that targets the ALB's DNS alias, the company can route users to the ALB endpoint and leverage its health checks and load balancing features4. By configuring scheduled scaling for the EC2 instances before the content updates, the company can anticipate and handle traffic spikes during peak periods5.
References:
What is Amazon DynamoDB Accelerator (DAX)?
What is Amazon EC2 Auto Scaling?
What is an Application Load Balancer?
Choosing a routing policy
Scheduled scaling for Amazon EC2 Auto Scaling

NEW QUESTION # 238
......

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