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NEW QUESTION 42
You are running a successful multitier web application on AWS and your marketing department has asked you to add a reporting tier to the application. The reporting tier will aggregate and publish status reports every 30 minutes from user-generated information that is being stored in your web application's database.
You are currently running a Multi-AZ RDS MySQL instance for the database tier.
You also have implemented ElastiCache as a database caching layer between the application tier and database tier. Please select the answer that will allow you to successfully implement the reporting tier with as little impact as possible to your database:

A. Generate the reports by querying the ElastiCache database caching tier.B. Continually send transaction logs from your master database to an S3 bucket and generate the reports off the S3 bucket using S3 byte range requests.C. Generate the reports by querying the synchronously replicated standby RDS MySQL instance maintained through Multi-AZ.D. Launch a RDS Read Replica connected to your Multi AZ master database and generate reports by querying the Read Replica.

Answer: D

 

NEW QUESTION 43
A financial services company loaded millions of historical stock trades into an Amazon DynamoDB table The table uses on-demand capacity mode Once each day at midnight. a few million new records are loaded into the table Application road activity against the table happens in bursts throughout the day. and a limited set of keys are repeatedly looked up The company needs to notice costs associated with DynamoDB.
Which strategy should a solutions architect recommend to meet this requirement?

A. Use provisioned capacity mode Purchase Savings Plans in Cost Explorer.B. Deploy DynamoDB Accelerator (DAX) Configure DynamoDB auto scaling Purchase Savings Flans in Cost Explorer.C. Deploy an Amazon ElastiCache cluster In front of the DynamoDB table.D. Deploy DynamoDB Accelerator (DAX). Use provisioned capacity mode. Configure DynamoDB auto scaling.

Answer: C

 

NEW QUESTION 44
An international company has deployed a multi-tier web application that relies on DynamoDB in a single region. For regulatory reasons they need disaster recovery capability in a separate region with a Recovery Time Objective of 2 hours and a Recovery Point Objective of 24 hours. They should synchronize their data on a regular basis and be able to provision the web application rapidly using CloudFormation.
The objective is to minimize changes to the existing web application, control the throughput of DynamoDB used for the synchronization of data, and synchronize only the modified elements.
Which design would you choose to meet these requirements?

A. Send also each write into an SQS queue in the second region, use an auto-scaling group behind the SQS queue to replay the write in the second regionB. Use EMR and write a custom script to retrieve data from DynamoDB in the current region using a SCAN operation and push it to DynamoDB in the second regionC. Use AWS Data Pipeline to schedule an export of the DynamoDB table to S3 in the current region once a day, then schedule another task Immediately after it that will import data from S3 to DynamoDB in the other regionD. Use AWS Data Pipeline to schedule a DynamoDB cross region copy once a day, create a
"LastUpdated" attribute in your DynamoDB table that would represent the timestamp of the last update and use it as a filter

Answer: C

Explanation:
Export of dynamo DB is incremental and it will amend the backup with latest changes.

 

NEW QUESTION 45
Your company hosts a social media website for storing and sharing documents. The web application allows user to upload large files while resuming and pausing the upload as needed.
Currently, files are uploaded to your PHP front end backed by Elastic load Balancing and an autoscaling fleet of Amazon Elastic Compute Cloud (EC2) instances that scale upon average of bytes received (NetworkIn). After a file has been uploaded, it is copied to Amazon Simple Storage Service (S3). Amazon EC2 instances use an AWS Identity and Access Management (IAM) role that allows Amazon S3 uploads. Over the last six months, your user base and scale have increased significantly, forcing you to increase the Auto Scaling group's Max parameter a few times. Your CFO is concerned about rising costs and has asked you to adjust the architecture where needed to better optimize costs. Which architecture change could you introduce to reduce costs and still keep your web application secure and scalable?

A. Re-architect your ingest pattern, and move your web application instances into a VPC public subnet.
Attach a public IP address for each EC2 instance (using the Auto Scaling launch configuration settings).
Use Amazon Route 53 Round Robin records set and HTTP health check to DNS load balance the app requests; this approach will significantly reduce the cost by bypassing Elastic Load Balancing.B. Replace the Auto Scaling launch configuration to include c3.8xlarge instances; those instances can potentially yield a network throuthput of 10gbps.C. Re-architect your ingest pattern, have the app authenticate against your identity provider, and use your identity provider as a broker fetching temporary AWS credentials from AWS Secure Token Service (GetFederationToken). Securely pass the credentials and S3 endpoint/prefix to your app.
Implement client-side logic to directly upload the file to Amazon S3 using the given credentials and S3 prefix.D. Re-architect your ingest pattern, have the app authenticate against your identity provider, and use your identity provider as a broker fetching temporary AWS credentials from AWS Secure Token Service (GetFederationToken). Securely pass the credentials and S3 endpoint/prefix to your app.
Implement client-side logic that used the S3 multipart upload API to directly upload the file to Amazon S3 using the given credentials and S3 prefix.

Answer: A

 

NEW QUESTION 46
A user is thinking to use EBS PIOPS volume.
Which of the below mentioned options is a right use case for the PIOPS EBS volume?

A. System boot volumeB. Log processingC. AnalyticsD. Mongo DB

Answer: D

Explanation:
Explanation
Provisioned IOPS volumes are designed to meet the needs of I/O-intensive workloads, particularly database workloads that are sensitive to storage performance and consistency in random access I/O throughput.
Provisioned IOPS volumes are designed to meet the needs of I/O-intensive workloads, particularly database workloads, that are sensitive to storage performance and consistency in random access I/O throughput business applications, database workloads, such as NoSQL DB, RDBMS, etc.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html

 

NEW QUESTION 47
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