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Q31. Your website is serving on-demand training videos to your workforce. Videos are uploaded monthly in high resolution MP4 format. Your workforce is distributed globally, often on the move and using company-provided tablets that require the HTTP Live Streaming (HLS) protocol to watch a video. Your company has no video transcoding expertise and If required you may need to pay for a consultant. How do you implement the most cost-efficient architecture without compromising high availability and quality of video delivery? 

A. A video transcoding pipeline running on EC2 using SQS to distribute tasks and Auto Scaling to adjust the number of nodes depending on the length of the queue. EBS volumes to host videos and EBS snapshots to incrementally backup original files after a few days. CloudFront to serve HLS transcoded videos from EC2. 

B. Elastic Transcoder to transcode original high-resolution MP4 videos to HLS. EBS volumes to host videos and EBS snapshots to incrementally backup original files after a few days. CloudFront to serve HLS transcoded videos from EC2. 

C. Elastic Transcoder to transcode original high-resolution MP4 videos to HLS. S3 to host videos with Lifecycle Management to archive original files to Glacier after a few days. CloudFront to serve HLS transcoded videos from S3. 

D. A video transcoding pipeline running on EC2 using SQS to distribute tasks and Auto Scaling to adjust the number of nodes depending on the length of the queue. S3 to host videos with Lifecycle Management to archive all files to Glacier after a few days. CloudFront to serve HLS transcoded videos from Glacier. 

Answer:

Q32. You are responsible for a legacy web application whose server environment is approaching end of life. You would like to migrate this application to AWS as quickly as possible, since the application environment currently has the following limitations: 

. the VM's single 10GB VMDK is almost full; 

. the virtual network Interface still uses the 10Mbps dnver, which leaves your 100Mbps WAN connection completely underutilized; 

. it is currently running on a highly customized, Windows VM within a VMware environment; 

. you do not have the installation media. 

This is a mission critical application with an RTO (Recovery Time Objective) of 8 hours, RPO (Recovery Point Objective) of 1 hour. How could you best migrate this application to AWS while meeting your business continuity requirements? 

A. Use S3 to create a backup of the VM and restore the data into EC2. 

B. Use the EC2 VM Import Connector for vCenter to import the VM into EC2. 

C. Use the ec2-bundle-instance API to import an image of the VM into EC2. 

D. Use Import/Export to import the VM as an EBS snapshot and attach to EC2. 

Answer:

Q33. A company is storing data on Amazon Simple Storage Service (S3). The company's security policy

mandates that data is encrypted at rest. Which of the following methods can achieve this?

Choose 3 answers

A. Use Amazon S3 server-side encryption with AWS Key Management Service managed keys.

B. Use Amazon S3 server-side encryption with customer-provided keys.

C. Use Amazon S3 server-side encryption with EC2 key pair.

D. Use Amazon S3 bucket policies to restrict access to the data at rest.

E. Encrypt the data on the client-side before ingesting to Amazon S3 using their own master key.

F. Use SSL to encrypt the data while in transit to Amazon S3.

Answer: A, B, E 

Q34. Refer to the Exhibit:

Refer to the architecture diagram above of a batch processing solution using Simple Queue Service (SQS) to set up a message queue between EC2 instances which are used as batch processors. CloudWatch monitors the number of job requests (queued messages) and an Auto Scaling group adds or deletes batch servers automatically based on parameters set in CloudWatch alarms. You can use this architecture to implement which of the following features in a cost effective and efficient manner? 

A. Coordinate number of EC2 instances with number of Job requests automatically, thus improving cost effectiveness. 

B. Reduce the overall time for executing Jobs through parallel processing by allowing a busy EC2 instance that receives a message to pass it to the next instance in a daisy-chain setup. 

C. Implement fault tolerance against EC2 instance failure since messages would remain in SQS and work can continue with recovery of EC2 instances. Implement fault tolerance against SQS failure by backing up messages to S3. 

D. Handle high priority Jobs before lower priority Jobs by assigning a priority metadata field to SQS messages. 

E. Implement message passing between EC2 instances within a batch by exchanging messages through SQS. 

Answer:

Q35. Your customer is willing to consolidate their log streams (access logs, application logs, security logs, etc.) in one single system. Once consolidated, the customer wants to analyze these logs in real time based on heuristics. From time to time, the customer needs to validate heuristics, which requires going back to data samples extracted from the last 12 hours. What is the best approach to meet your customer's requirements? 

A. Configure Amazon CloudTrail to receive custom logs, use EMR to apply heuristics the logs 

B. Send all the log events to Amazon SQS, setup an Auto Scaling group of EC2 servers to consume the logs and apply the heuristics 

C. Setup an Auto Scaling group of EC2 syslogd servers, store the logs on S3, use EMR to apply heuristics on the logs 

D. Send all the log events to Amazon Kinesis, develop a client process to apply heuristics on the logs 

Answer:

Q36. A company is running a batch analysis every hour on their main transactional DB, running on an RDS MySQL instance, to populate their central Data Warehouse running on Redshift. During the execution of the batch, their transactional applications are very slow. When the batch completes they need to update the top management dashboard with the new dat a. The dashboard is produced by another system running on-premises that is currently started when a manually-sent email notifies that an update is required. The on-premises system cannot be modified because is managed by another team. How would you optimize this scenario to solve performance issues and automate the process as much as possible? 

A. Create an RDS Read Replica for the batch analysis and SNS to notify the on-premises system to update the dashboard. 

B. Create an RDS Read Replica for the batch analysis and SQS to send a message to the on premises system to update the dashboard. 

C. Replace RDS with Redshift for the batch analysis and SNS to notify the on-premises system to update the dashboard. 

D. Replace RDS with Redshift for the batch analysis and SQS to send a message to the on- premises system to update the dashboard. 

Answer:

Q37. A large real-estate brokerage is exploring the option of adding a cost-effective location based alert to their existing mobile application. The application backend infrastructure currently runs on AWS. Users who opt in to this service will receive alerts on their mobile device regarding real-estate offers in proximity to their location. For the alerts to be relevant delivery time needs to be in the low minute count. The existing mobile app has 5 million users across the US. Which one of the following architectural suggestions would you make to the customer? 

A. The mobile application will send device location using SQS, EC2 instances will retrieve the relevant offers from DynamoDB. AWS Mobile Push will be used to send offers to the mobile application. 

B. Use AWS DirectConnect or VPN to establish connectivity with mobile carriers. EC2 instances will receive the mobile applications location through earner connection; RDS will be used to store and retrieve relevant offers. EC2 instances will communicate with mobile carriers to push alerts back to the mobile application. 

C. The mobile application will submit its location to a web service endpoint utilizing Elastic Load Balancing and EC2 instances; DynamoDB will be used to store and retrieve relevant offers. EC2 instances will communicate with mobile carriers/device providers to push alerts back to mobile application. 

D. The mobile application will send device location using AWS Mobile Push, EC2 instances will retrieve the relevant offers from DynamoDB. EC2 instances will communicate with mobile carriers/device providers to push alerts back to the mobile application. 

Answer:

Q38. 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:

Q39. 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:

Q40. Your team has a tomcat-based java application you need to deploy into development, test and production environments. After some research, you opt to use Elastic Beanstalk due to its tight integration with your developer tools and RDS due to its ease of management. Your QA team lead points out that you need to roll a sanitized set of production data into your environment on a nightly basis. Similarly, other software teams in your org want access to that same restored data via their EC2 instances in your VPC. The optimal setup for persistence and security that meets the above requirements would be the following: 

A. Create your RDS instance separately and add its IP address to your application's DB connection strings in your code. Alter its security group to allow access to it from hosts within your VPC's IP address block. 

B. Create your RDS instance separately and pass its DNS name to your's DB connection string as an environment variable. Alter its security group to allow access to it from hosts in your application subnets. 

C. Create your RDS instance as part of your Elastic Beanstalk definition and alter its security group to allow access to it from hosts in your application subnets. 

D. Create your RDS instance separately and pass its DNS name to your app's DB connection string as an environment variable. Create a security group for client machines and add it as a valid source for DB traffic to the security group of the RDS instance itself. 

Answer:

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