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Q41. You are designing a photo-sharing mobile app. The application will store all pictures in a single Amazon S3 bucket. Users will upload pictures from their mobile device directly to Amazon S3 and will be able to view and download their own pictures directly from Amazon S3. You want to configure security to handle potentially millions of users in the most secure manner possible. What should your server-side application do when a new user registers on the photo-sharing mobile application? 

A. Create an IAM user. Update the bucket policy with appropriate permissions for the IAM user. Generate an access key and secret key for the IAM user, store them in the mobile app and use these credentials to access Amazon S3. 

B. Create an IAM user. Assign appropriate permissions to the IAM user. Generate an access key and secret key for the IAM user, store them in the mobile app and use these credentials to access Amazon S3. 

C. Create a set of long-term credentials using AWS Security Token Service with appropriate permissions. Store these credentials in the mobile app and use them to access Amazon S3. 

D. Record the user's information in Amazon RDS and create a role in IAM with appropriate permissions. When the user uses their mobile app, create temporary credentials using the AWS Security Token Service "AssumeRole" function. Store these credentials in the mobile app’s memory and use them to access Amazon S3. Generate new credentials the next time the user runs the mobile app. 

E. Record the user's information in Amazon DynamoDB. When the user uses their mobile app, create temporary credentials using AWS Security Token Service with appropriate permissions. Store these credentials in the mobile app's memory and use them to access Amazon S3. 

Generate new credentials the next time the user runs the mobile app. 

Answer: D 


Q42. 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 15 minute DB backups stored in Glacier 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 hourly DB backups to S3, with transaction logs stored in S3 every 5 minutes. 

Answer: C 


Q43. 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. 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. 

B. 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. 

C. Use the Parameter section in the CloudFormation template to have the user input Access and Secret keys from an already created IAM user that has the permissions required to read and write from the required DynamoDB table. 

D. 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. 

Answer: B 


Q44. 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 an Multi-AZ RDS MySQL Extra Large DB Instance backend. 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. Add an RDS MySQL read replica in each availability zone. 

B. Deploy ElastiCache in-memory cache running in each availability zone. 

C. Increase the RDS MySQL instance size and implement provisioned IOPS. 

D. Implement sharding to distribute load to multiple RDS MySQL Instances. 

Answer: B, C 


Q45. You're running an application on-premises due to its dependency on non-x86 hardware and want to use AWS for data backup. Your backup application is only able to write to POSIX-compatible, block-based storage. You have 140TB of data and would like to mount it as a single folder on your file server. Users must be able to access portions of this data while the backups are taking place. What backup solution would be most appropriate for this use case? 

A. Use Storage Gateway and configure it to use Gateway Cached volumes 

B. Use Storage Gateway and configure it to use Gateway Stored volumes 

C. Configure your backup software to use S3 as the target for your data backups 

D. Configure your backup software to use Glacier as the target for your data backups 

Answer: D 


Q46. Your company is in the process of developing a next generation pet collar that collects biometric information to assist families with promoting healthy lifestyles for their pets. Each collar will push 30kb of biometric data in JSON format every 2 seconds to a collection platform that will process and analyze the data providing health trending information back to the pet owners and veterinarians via a web portal. Management has tasked you to architect the collection platform ensuring the following requirements are met: 

. Provide the ability for real-time analytics of the inbound biometric data 

. Ensure processing of the biometric data is highly durable, elastic and parallel 

. The results of the analytic processing should be persisted for data mining Which architecture outlined below will meet the initial requirements for the collection platform? 

A. Utilize Amazon Kinesis to collect the inbound sensor data, analyze the data with Kinesis clients and save the results to a Redshift cluster using EMR. 

B. Utilize SQS to collect the inbound sensor data, analyze the data from SQS with Amazon Kinesis and save the results to a Microsoft SQL Server RDS Instance. 

C. Utilize S3 to collect the inbound sensor data, analyze the data from S3 with a daily scheduled Data Pipeline and save the results to a Redshift Cluster. 

D. Utilize EMR to collect the inbound sensor data, analyze the data from EMR with Amazon Kinesis and save the results to DynamoDB. 

Answer: A 


Q47. A newspaper organization has a on-premises application which allows the public to search Its back catalogue and retrieve individual newspaper pages via a website written in Jav a. 

They have scanned the old newspapers into JPEGs (approx. 17TB) and used Optical Character Recognition (OCR) to populate a commercial search product. The hosting platform and software are now end of life and the organization wants to migrate its archive to AWS and produce a cost efficient architecture and still be designed for availability and durability. Which is the most appropriate? 

A. Model the environment using CloudFormation, use an EC2 instance running Apache webserver and an open source search application, stripe multiple standard EBS volumes together to store the JPEGs and search index 

B. Use a single-AZ RDS MySQL instance to store the search index and the JPEG Images, use an EC2 Instance to serve the website and translate user queries into SQL 

C. Use a CloudFront download distribution to serve the JPEGs to the end users and install the current commercial search product, along with a Java Container for the website on EC2 instances and use Route53 with DNS round-robin 

D. Use S3 with standard redundancy to store and serve the scanned files, use CloudSearch for query processing, and use Elastic Beanstalk to host the website across multiple availability zones 

E. Use S3 with reduced redundancy to store and serve the scanned files, install the commercial search application on EC2 instances and configure with auto-scaling and an Elastic Load Balancer 

Answer: A 


Q48. A web-startup runs its very successful social news application on Amazon EC2 with an Elastic Load Balancer, an Auto-Scaling group of Java/Tomcat application-servers, and DynamoDB as data store. The main web-application best runs on m2.xlarge instances since it is highly memory- bound. Each new deployment requires semi-automated creation and testing of a new AMI for the application servers, which takes quite a while and is therefore only done once per week. Recently, a new chat feature has been implemented in node.js and waits to be integrated in the architecture. First tests show that the new component is CPU bound. Because the company has some experience with using Chef, they decided to streamline the deployment process and use AWS OpsWorks as an application life cycle tool to simplify management of the application and reduce the deployment cycles. What configuration in AWS OpsWorks is necessary to integrate the new chat module in the most cost-efficient and flexible way? 

A. Create one AWS OpsWorks stack, create one AWS OpsWorks layer, create one custom recipe 

B. Create two AWS OpsWorks stacks, create two AWS OpsWorks layers, create one custom recipe 

C. Create one AWS OpsWorks stack, create two AWS OpsWorks layers, create one custom recipe 

D. Create two AWS OpsWorks stacks, create two AWS OpsWorks layers, create two custom recipes 

Answer: B