Question 6 of 1019

Your firm has uploaded a large amount of aerial image data to S3. In the past, in your on-premises environment, you used a dedicated group of servers to oaten process this data and used Rabbit MQ - An open source messaging system to get job information to the servers. Once processed the data would go to tape and be shipped offsite. Your manager told you to stay with the current design, and leverage AWS archival storage and messaging services to minimize cost.

Which is correct?

    Correct Answer: C

    Given the requirements to stay with the current design while minimizing costs, using Auto-Scaled workers triggered by queue depth and spot instances in SQS is optimal for processing messages efficiently and cost-effectively. Once the data is processed, using Glacier for archival storage further reduces costs due to Glacier's low storage cost for infrequently accessed data. This setup leverages AWS services effectively to minimize operational costs while meeting the manager's requirements.

Question 7 of 1019

You've been hired to enhance the overall security posture for a very large e-commerce site. They have a well architected multi-tier application running in a VPC that uses ELBs in front of both the web and the app tier with static assets served directly from S3. They are using a combination of RDS and DynamoDB for their dynamic data and then archiving nightly into S3 for further processing with EMR. They are concerned because they found questionable log entries and suspect someone is attempting to gain unauthorized access.

Which approach provides a cost effective scalable mitigation to this kind of attack?

    Correct Answer: C

    The most effective and scalable solution involves adding a new WAF tier. Creating an additional ELB and an AutoScaling group of EC2 instances running a WAF ensures that traffic is filtered before it reaches the web tier, providing better security. This approach allows for dynamic scaling based on traffic load and sophisticated filtering rules that can adapt to new threats. While the description of a 'host-based WAF' might be somewhat misleading, it clearly implies leveraging a third-party WAF solution. This method effectively mitigates the risk of unauthorized access by providing a robust, scalable defense mechanism at the perimeter of the infrastructure.

Question 8 of 1019

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 win meet the initial requirements for the collection platform?

    Correct Answer: B

    Utilizing Amazon Kinesis to collect the inbound sensor data allows for real-time analytics due to its ability to process streaming data with low latency. Kinesis clients can be employed to analyze the data in parallel, ensuring the processing is highly durable and elastic. Saving the results to a Redshift cluster using EMR (Elastic MapReduce) fits the requirement for data mining, as Redshift is optimized for complex queries and large-scale data analysis.

Question 9 of 1019

You are designing Internet connectivity for your VPC. The Web servers must be available on the Internet.

The application must have a highly available architecture.

Which alternatives should you consider? (Choose two.)

    Correct Answer: CD

    To design Internet connectivity for a VPC with highly available web servers, using Elastic Load Balancer (ELB) and Route 53 CNAME record or assigning Elastic IPs (EIPs) to web servers with health checks and DNS failover are effective strategies. Placing web servers behind an ELB ensures traffic is distributed evenly and remains available if some servers fail. Route 53 can point to the ELB DNS for seamless traffic management. Assigning EIPs to web servers allows Route 53 to manage traffic based on health checks, ensuring high availability and failover capabilities. Both approaches meet the requirement for high availability and Internet-facing connectivity.

Question 10 of 1019

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.

    Correct Answer: C

    The optimal setup is to create your RDS instance separately and pass its DNS name to your application's DB connection string as an environment variable. By creating a security group for client machines and adding it as a valid source for DB traffic to the security group of the RDS instance itself, you ensure both persistence and security of the database instance. This approach decouples the database from the Elastic Beanstalk environment, thereby avoiding the risk of losing the data if the environment is terminated, and it provides the flexibility to manage security group rules more securely and selectively.