AWS-Certified-Solutions-Architect-Professional Amazon Exam Questions and Free Practice Test

Question 73

Your company is getting ready to do a major public announcement of a social media site on AWS. The website is running on EC2 instances deployed across multiple Availability Zones with a MuIti-AZ RDS MySQL Extra Large DB Instance. The site performs a high number of small reads and writes per second and relies on an eventual consistency model. After comprehensive tests you discover that there is read contention on RDS MySQL. Which are the best approaches to meet these requirements? (Choose 2 answers)

A. Deploy E|astiCache in-memory cache running in each availability zone

B. Implement sharding to distribute load to multiple RDS lV|ySQL instances

C. Increase the RDS MySQL Instance size and Implement provisioned IOPS

D. Add an RDS MySQL read replica in each availability zone

Correct Answer:AC

Question 74

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 fileet of Amazon Elastic Compute Cloud (EC2) instances that scale upon average of bytes received (Networkln). 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. Replace the Auto Scaling launch configuration to include c3.8xIarge instances; those instances can potentially yield a network throuthput of 10gbps.

B. 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 ap

C. 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, and move your web application instances into a VPC public subne

E. 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 apprequests; this approach will significantly reduce the cost by bypassing Elastic Load Balancing.

F. 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 ap

G. 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.

Correct Answer:C

Question 75

An ERP application is deployed across multiple AZs in a single region. In the event of failure, the Recovery Time Objective (RTO) must be less than 3 hours, and the Recovery Point Objective (RPO) must be 15 minutes the customer realizes that data corruption occurred roughly 1.5 hours ago.
What DR strategy could be used to achieve this RTO and RPO in the event of this kind of failure?

A. Take hourly DB backups to S3, with transaction logs stored in S3 every 5 minutes.

B. Use synchronous database master-slave replication between two availability zones.

C. Take hourly DB backups to EC2 Instance store volumes with transaction logs stored In S3 every 5 minutes.

D. Take 15 minute DB backups stored In Glacier with transaction logs stored in S3 every 5 minute

Correct Answer:A

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