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Amazon AWS Certified Solutions Architect - Professional Sample Questions (Q369-Q374):

NEW QUESTION # 369
A company has deployed its database on an Amazon RDS for MySQL DB instance in the us-east-1 Region.
The company needs to make its data available to customers in Europe. The customers in Europe must have access to the same data as customers in the United States (US) and will not tolerate high application latency or stale data. The customers in Europe and the customers in the US need to write to the database. Both groups of customers need to see updates from the other group in real time.
Which solution will meet these requirements?

A. Create an Amazon Aurora MySQL replica of the RDS for MySQL DB instance. Pause application writes to the RDS DB instance. Promote the Aurora Replica to a standalone DB cluster. Reconfigure the application to use the Aurora database and resume writes. Add eu-west-1 as a secondary Region to the
06 cluster. Enable write forwarding on the DB cluster. Deploy the application in eu-west-1. Configure the application to use the Aurora MySQL endpoint in eu- west-1.
B. Convert the RDS for MySQL DB instance to an Amazon Aurora MySQL DB cluster. Add eu-west-1 as a secondary Region to the DB cluster. Enable write forwarding on the DB cluster. Deploy the application in eu-west-1. Configure the application to use the Aurora MySQL endpoint in eu-west-1.
C. Copy the most recent snapshot from the RDS for MySQL DB instance to eu-west-1. Create a new RDS for MySQL DB instance in eu-west-1 from the snapshot. Configure MySQL logical replication from us-east-1 to eu-west-1. Enable write forwarding on the DB cluster. Deploy the application in eu-west-1.
Configure the application to use the RDS for MySQL endpoint in eu-west-1.
D. Add a cross-Region replica in eu-west-1 for the RDS for MySQL DB instance. Configure the replica to replicate write queries back to the primary DB instance. Deploy the application in eu-west-1. Configure the application to use the RDS for MySQL endpoint in eu-west-1.

Answer: B

Explanation:
Explanation
The company should use AWS Amplify to create a static website for uploads of media files. The company should use Amplify Hosting to serve the website through Amazon CloudFront. The company should use Amazon S3 to store the uploaded media files. The company should use Amazon Cognito to authenticate users.
This solution will meet the requirements with the least operational overhead because AWS Amplify is a complete solution that lets frontend web and mobile developers easily build, ship, and host full-stack applications on AWS, with the flexibility to leverage the breadth of AWS services as use cases evolve. No cloud expertise needed1. By using AWS Amplify, the company can refactor the application to a serverless architecture that reduces operational complexity and costs. AWS Amplify offers the following features and benefits:
Amplify Studio: A visual interface that enables you to build and deploy a full-stack app quickly, including frontend UI and backend.
Amplify CLI: A local toolchain that enables you to configure and manage an app backend with just a few commands.
Amplify Libraries: Open-source client libraries that enable you to build cloud-powered mobile and web apps.
Amplify UI Components: Open-source design system with cloud-connected components for building feature-rich apps fast.
Amplify Hosting: Fully managed CI/CD and hosting for fast, secure, and reliable static and server-side rendered apps.
By using AWS Amplify to create a static website for uploads of media files, the company can leverage Amplify Studio to visually build a pixel-perfect UI and connect it to a cloud backend in clicks. By using Amplify Hosting to serve the website through Amazon CloudFront, the company can easily deploy its web app or website to the fast, secure, and reliable AWS content delivery network (CDN), with hundreds of points of presence globally. By using Amazon S3 to store the uploaded media files, the company can benefit from a highly scalable, durable, and cost-effective object storage service that can handle any amount of data2. By using Amazon Cognito to authenticate users, the company can add user sign-up, sign-in, and access control to its web app with a fully managed service that scales to support millions of users .
The other options are not correct because:
Using AWS Application Migration Service to migrate the application server to Amazon EC2 instances would not refactor the application or accelerate development. AWS Application Migration Service (AWS MGN) is a service that enables you to migrate physical servers, virtual machines (VMs), or cloud servers from any source infrastructure to AWS without requiring agents or specialized tools. However, this would not address the challenges of overutilization and data uploads failures. It would also not reduce operational overhead or costs compared to a serverless architecture.
Creating a static website for uploads of media files and using AWS AppSync to create an API would not be as simple or fast as using AWS Amplify. AWS AppSync is a service that enables you to create flexible APIs for securely accessing, manipulating, and combining data from one or more data sources.
However, this would require more configuration and management than using Amplify Studio and Amplify Hosting. It would also not provide authentication features like Amazon Cognito.
Setting up AWS IAM Identity Center (AWS Single Sign-On) to give users the ability to sign in to the application would not be as suitable as using Amazon Cognito. AWS Single Sign-On (AWS SSO) is a service that enables you to centrally manage SSO access and user permissions across multiple AWS accounts and business applications. However, this service is designed for enterprise customers who need to manage access for employees or partners across multiple resources. It is not intended for authenticating end users of web or mobile apps.
References:
https://aws.amazon.com/amplify/
https://aws.amazon.com/s3/
https://aws.amazon.com/cognito/
https://aws.amazon.com/mgn/
https://aws.amazon.com/appsync/
https://aws.amazon.com/single-sign-on/

NEW QUESTION # 370
Once the user has set ElastiCache for an application and it is up and running, which services, does
Amazon not provide for the user:

A. The ability for client programs to automatically identify all of the nodes in a cache cluster, and to initiate
and maintain connections to all of these nodes
B. Automating common administrative tasks such as failure detection and recovery, and software
patching
C. Providing default Time To Live (TTL) in the AWS Elasticache Redis Implementation for different type of
data.
D. Providing detailed monitoring metrics associated with your Cache Nodes, enabling you to diagnose
and react to issues very quickly

Answer: C

Explanation:
Amazon provides failure detection and recovery, and software patching and monitoring tools which is
called CloudWatch. In addition it provides also Auto Discovery to automatically identify and initialize all
nodes of cache cluster for Amazon ElastiCache.
Reference: http://docs.aws.amazon.com/AmazonElastiCache/latest/UserGuide/WhatIs.html

NEW QUESTION # 371
A company had a tight deadline to migrate its on-premises environment to AWS. It moved over Microsoft SQL Servers and Microsoft Windows Servers using the virtual machine import/export service and rebuild other applications native to the cloud. The team created both Amazon EC2 databases and used Amazon RDS.
Each team in the company was responsible for migrating their applications, and they have created individual accounts for isolation of resources. The company did not have much time to consider costs, but now it would like suggestions on reducing its AWS spend.
Which steps should a Solutions Architect take to reduce costs?

A. Enable AWS Business Support and review AWS Trusted Advisor's cost checks. Create Amazon EC2 Auto Scaling groups for applications that experience fluctuating demand. Save AWS Simple Monthly Calculator reports in Amazon S3 for trend analysis. Create a master account under Organizations and have teams join for consolidating billing.
B. Enable Cost Explorer and AWS Business Support Reserve Amazon EC2 and Amazon RDS DB instances. Use Amazon CloudWatch and AWS Trusted Advisor for monitoring and to receive cost-savings suggestions. Create a master account under Organizations and have teams join for consolidated billing.
C. Create an AWS Lambda function that changes the instance size based on Amazon CloudWatch alarms.
Reserve instances based on AWS Simple Monthly Calculator suggestions. Have an AWS Well-Architected framework review and apply recommendations. Create a master account under Organizations and have teams join for consolidated billing.
D. Create a budget and monitor for costs exceeding the budget. Create Amazon EC2 Auto Scaling groups for applications that experience fluctuating demand. Create an AWS Lambda function that changes instance sizes based on Amazon CloudWatch alarms. Have each team upload their bill to an Amazon S3 bucket for analysis of team spending. Use Spot instances on nightly batch processing jobs.

Answer: D

Explanation:
Explanation
Import/Export supports importing and exporting data into and out of Amazon S3 buckets. For significant data sets, AWS Import/Export is often faster than Internet transfer and more cost effective than upgrading your connectivity.

NEW QUESTION # 372
A user has launched a dedicated EBS backed instance with EC2. You are curious where the EBS volume for this instance will be created.
Which statement is correct about the EBS volume's creation?

A. The EBS volume will be created on the same tenant hardware assigned to the dedicated instance
B. The user can specify where the EBS will be created
C. The EBS volume will not be created on the same tenant hardware assigned to the dedicated instance
D. AWS does not allow a dedicated EBS backed instance launch

Answer: C

Explanation:
Explanation
The dedicated instances are Amazon EC2 instances that run in a Virtual Private Cloud (VPC) on hardware that is dedicated to a single customer. When a user launches an Amazon EBS-backed dedicated instance, the EBS volume does not run on single-tenant hardware.
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/dedicated-instance.html

NEW QUESTION # 373
A greeting card company recently advertised that customers could send cards to their favourite celebrities through the company's platform Since the advertisement was published, the platform has received constant traffic from 10.000 unique users each second.
The platform runs on m5.xlarge Amazon EC2 instances behind an Application Load Balancer (ALB) The instances run in an Auto Scaling group and use a custom AMI that is based on Amazon Linux. The platform uses a highly available Amazon Aurora MySQL DB cluster that uses primary and reader endpoints The platform also uses an Amazon ElastiCache for Redis cluster that uses its cluster endpoint The platform generates a new process for each customer and holds open database connections to MySQL for the duration of each customer's session However, resource usage for the platform is low.
Many customers are reporting errors when they connect to the platform Logs show that connections to the Aurora database are failing Amazon CloudWatch metrics show that the CPU load is tow across the platform and that connections to the platform are successful through the ALB.
Which solution will remediate the errors MOST cost-effectively?

A. Increase the number of nodes in the ElastiCache for Redis cluster
B. Increase the number of reader nodes in the Aurora MySQL cluster
C. Use Amazon RDS Proxy Reconfigure the database connections to use the proxy
D. Set up an Amazon CloudFront distribution Set the ALB as the origin Move all customer traffic to the CloudFront distribution endpoint

Answer: B

NEW QUESTION # 374
......

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