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Q21. You are running a news website in the eu-west-1 region that updates every 15 minutes. The website has a world-wide audience. It uses an Auto Scaling group behind an Elastic Load Balancer and an Amazon RDS database. Static content resides on Amazon S3, and is distributed through Amazon CloudFront. Your Auto Scaling group is set to trigger a scale up event at 60% CPU utilization. You use an Amazon RDS extra large DB instance with 10,000 Provisioned IOPS, its CPU utilization is around 80%, while freeable memory is in the 2 GB range. web analytics reports show that the average load time of your web pages is around 1.5 to 2 seconds, but your SEO consultant wants to bring down the average load time to under 0.5 seconds. How would you Improve page load times for your users? Choose 3 answers 

A. Configure Amazon CloudFront dynamic content support to enable caching of re-usable content from your site. 

B. Set up a second installation in another region, and use the Amazon Route 53 latency-based routing feature to select the right region. 

C. Lower the scale up trigger of your Auto Scaling group to 30% so it scales more aggressively. 

D. Add an Amazon ElastiCache caching layer to your application for storing sessions and frequent DB queries. 

E. Switch the Amazon RDS database to the high memory extra large instance type. 

Answer: C, D, E 

Q22. Your system recently experienced down time. During the troubleshooting process you found that a new administrator mistakenly terminated several production EC2 instances. Which of the following strategies will help prevent a similar situation in the future? The administrator still must be able to: 

-launch, start, stop, and terminate development resources, 

-launch and start production instances. 

A. Leverage EC2 termination protection and multi-factor authentication, which together require users to authenticate before terminating EC2 instances. 

B. Leverage resource based tagging, along with an IAM user which can prevent specific users from terminating production EC2 resources. 

C. Create an IAM user which is not allowed to terminate instances by leveraging production EC2 termination protection. 

D. Create an IAM user and apply an IAM role which prevents users from terminating production EC2 instances. 

Answer:

Q23. 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?

A. 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.

B. 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.

C. 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.

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

Answer: B

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? 

A. Recommend that they lease space at a Direct Connect partner location and establish a 1G Direct Connect connection to their VPC. They would then establish Internet connectivity into their space, filter the traffic in a hardware Web Application Firewall (WAF), and then pass the traffic through the Direct Connect connection into their application running in their VPC. 

B. Add previously identified hostile source IPs as an explicit INBOUND DENY NACL to the web tier subnet. 

C. Add a WAF tier by creating a new ELB and an AutoScaling group of EC2 Instances running a host-based WAF. They would redirect Route 53 to resolve to the new WAF tier ELB. The WAF tier would then pass the traffic to the current web tier. The web tier Security Groups would be updated to only allow traffic from the WAF tier Security Group. 

D. Remove all but TLS 1.2 from the web tier ELB and enable Advanced Protocol Filtering. This will enable the ELB itself to perform WAF functionality. 

Answer:

Q24. You have deployed a three-tier web application in a VPC with a CIDR block of 10.0.0.0/28. You initially deploy two web servers, two application servers, two database servers and one NAT instance for a total of seven EC2 instances. The web, application and database servers are deployed across two availability zones (AZs). You also deploy an ELB in front of the two web servers, and use Route53 for DNS. Web traffic gradually increases in the first few days following the deployment, so you attempt to double the number of instances in each tier of the application to handle the new load. Unfortunately some of these new Instances fall to launch. Which of the following could be the root cause? Choose 2 answers A. AWS reserves the first and the last private IP address in each subnet's CIDR block so you do not have enough addresses left to launch all of the new EC2 instances 

B. The Internet Gateway (IGW) of your VPC has scaled-up, adding more instances to handle the traffic spike, reducing the number of available private IP addresses for new instance launches 

C. The ELB has scaled-up, adding more instances to handle the traffic spike, reducing the number of available private IP addresses for new instance launches 

D. AWS reserves one IP address in each subnet's CIDR block for Route53 so you do not have enough addresses left to launch all of the new EC2 instances 

E. AWS reserves the first four and the last IP address in each subnet's CIDR block so you do not have enough addresses left to launch all of the new EC2 instances 

Answer: A, C 

Q25. 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:

Q26. You are migrating a legacy client-server application to AWS. The application responds to a specific DNS domain (e.g. www.example.com) and has a 2-tier architecture, with multiple application servers and a database server. Remote clients use TCP to connect to the application servers. The application servers need to know the IP address of the clients in order to function properly and are currently taking that information from the TCP socket. A Multi-AZ RDS MySQL instance will be used for the database. During the migration you can change the application code, but you have to file a change request. How would you implement the architecture on AWS in order to maximize scalability and high availability? 

A. File a change request to implement Alias Resource support in the application. Use Route 53 Alias Resource Record to distribute load on two application servers in different AZs. 

B. File a change request to implement Latency Based Routing support in the application. Use Route 53 with Latency Based Routing enabled to distribute load on two application servers in different AZs. 

C. File a change request to implement Cross-Zone support in the application. Use an ELB with a TCP Listener and Cross-Zone Load Balancing enabled, two application servers in different AZs. 

D. File a change request to implement Proxy Protocol support in the application. Use an ELB with a TCP Listener and Proxy Protocol enabled to distribute load on two application servers in different AZs. 

Answer:

Q27. You are designing a data leak prevention solution for your VPC environment. You want your VPC instances to be able to access software depots and distributions on the Internet for product updates. The depots and distributions are accessible via third party CDNs by their URLs. You want to explicitly deny any other outbound connections from your VPC instances to hosts on the Internet. Which of the following options would you consider? 

A. Implement security groups and configure outbound rules to only permit traffic to software depots. 

B. Configure a web proxy server in your VPC and enforce URL-based rules for outbound access. Remove default routes. 

C. Implement network access control lists to allow specific destinations, with an implicit deny all rule. 

D. Move all your instances into private VPC subnets. Remove default routes from all routing tables and add specific routes to the software depots and distributions only. 

Answer:

Q28. A customer has established an AWS Direct Connect connection to AWS. The link is up and routes are being advertised from the customer's end; however the customer is unable to connect from EC2 instances inside its VPC to servers residing in its datacenter. Which of the following options provide a viable solution to remedy this situation? Choose 2 answers 

A. Modify the instances VPC subnet route table by adding a route back to the customer's on- premises environment. 

B. Enable route propagation to the customer gateway (CGW). 

C. Add a route to the route table with an IPsec VPN connection as the target. 

D. Enable route propagation to the virtual private gateway (VGW). 

E. Modify the route table of all instances using the route' command. 

Answer: B, C 

Q29. 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 2 answers 

A. Assign EIPs to all Web servers. Configure a Route53 record set with all EIPs, with health checks and DNS failover. 

B. Configure a NAT instance in your VPC. Create a default route via the NAT Instance and associate it with all subnets. Configure a DNS A record that points to the NAT Instance public IP address. 

C. Configure a CloudFront distribution and configure the origin to point to the private IP addresses of your Web servers. Configure a Route53 CNAME record to your CloudFront distribution. 

D. Place all your Web servers behind ELB. Configure a Route53 CNAME to point to the ELB DNS name. 

E. Configure ELB with an EIP. Place all your Web servers behind ELB. Configure a Route53 A record that points to the EIP. 

Answer: C, D 

Q30. Your company hosts a social media site supporting users in multiple countries. You have been asked to provide a highly available design for the application that leverages multiple regions for the most recently accessed content and latency sensitive portions of the web site. The most latency sensitive component of the application Involves reading user preferences to support web site personalization and ad selection. In addition to running your application in multiple regions, which option will support this application's requirements? 

A. Use the S3 Copy API to copy recently accessed content to multiple regions and serve user content from S3, CloudFront with dynamic content, and an ELB in each region. Retrieve user preferences from an ElastiCache cluster in each region and leverage SNS notifications to propagate user preference changes to a worker node in each region. 

B. Serve user content from S3, CloudFront with dynamic content, and an ELB in each region. Retrieve user preferences from an ElastiCache cluster in each region and leverage Simple Workflow (SWF) to manage the propagation of user preferences from a centralized DB to each ElastiCache cluster. 

C. Serve user content from S3, CloudFront, and use Route53 latency-based routing between ELBs in each region. Retrieve user preferences from a local DynamoDB table in each region and leverage SQS to capture changes to user preferences with SQS workers for propagating updates to each table. 

D. Use the S3 Copy API to copy recently accessed content to multiple regions and serve user content from S3, CloudFront, and Route53 latency-based routing between ELBs in each region. Retrieve user preferences from a DynamoDB table and leverage SQS to capture changes to user preferences with SQS workers for propagating DynamoDB updates. 

Answer:

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