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Q1. A customer has a 10 GB AWS Direct Connect connection to an AWS region where they have a web application hosted on Amazon Elastic Computer Cloud (EC2). The application has dependencies on an on-premises mainframe database that uses a BASE (Baste Available, Soft state, Eventual consistency) rather than an ACID (Atomicity, Consistency, Isolation, Durability) consistency model. The application is exhibiting undesirable behavior because the database is not able to handle the volume of writes. How can you reduce the load on your on- premises database resources in the most cost-effective way? 

A. Provision an RDS read-replica database on AWS to handle the writes and synchronize the two databases using Data Pipeline. 

B. Modify the application to use DynamoDB to feed an EMR cluster which uses a map function to write to the on-premises database. 

C. Modify the application to write to an Amazon SQS queue and develop a worker process to flush the queue to the on-premises database. 

D. Use an Amazon Elastic Map Reduce (EMR) S3DistCp as a synchronization mechanism between the on- premises database and a Hadoop cluster on AWS. 

Answer: D 


Q2. You are running a successful multitier web application on AWS and your marketing department has asked you to add a reporting tier to the application. The reporting tier will aggregate and publish status reports every 30 minutes from user-generated information that is being stored in your web application's database. You are currently running a Multi-AZ RDS MySQL instance for the database tier. You also have implemented ElastiCache as a database caching layer between the application tier and database tier. Please select the answer that will allow you to successfully implement the reporting tier with as little impact as possible to your database: 

A. Launch a RDS Read Replica connected to your Multi AZ master database and generate reports by querying the Read Replica. 

B. Continually send transaction logs from your master database to an S3 bucket and generate the reports off the S3 bucket using S3 byte range requests. 

C. Generate the reports by querying the ElastiCache database caching tier. 

D. Generate the reports by querying the synchronously replicated standby RDS MySQL instance maintained through Multi-AZ. 

Answer: B 


Q3. 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 


Q4. A company is building a voting system for a popular TV show, viewers will watch the performances then visit the show's website to vote for their favorite performer. It is expected that in a short period of time after the show has finished the site will receive millions of visitors, the visitors will first login to the site using theirAmazon.com credentials and then submit their vote. After the voting is completed the page will display the vote totals. The company needs to build the site such that it can handle the rapid influx of traffic while maintaining good performance but also wants to keep costs to a minimum. Which of the design patters below should they use? 

A. Use CloudFront and an Elastic Load Balancer in front of an auto-scaled set of web servers, the web servers will first call the Login With Amazon service to authenticate the user, the web servers will process the users vote and store the result into a DynamoDB table using IAM Roles for EC2 Instances to gain permissions to the DynamoDB table. 

B. Use CloudFront and an Elastic Load Balancer in front of an auto-scaled set of web servers, the web servers will first call the Login With Amazon service to authenticate the user, the web servers will process the users vote and store the result into an SQS queue using IAM Roles for EC2 Instances to gain permissions to the SQS queue. A set of application servers will then retrieve the items from the queue and store the result into a DynamoDB table. 

C. Use CloudFront and an Elastic Load Balancer in front of an auto-scaled set of web servers, the web servers will first call the Login With Amazon service to authenticate the user then process the users vote and store the result into a multi-AZ Relational Database Service instance. 

D. Use CloudFront and the static website hosting feature of S3 with the Javascript SDK to call the Login with Amazon service to authenticate the user, use IAM Roles to gain permissions to a DynamoDB table to store the users vote. 

Answer: A 


Q5. An international company has deployed a multi-tier web application that relies on DynamoDB in a single region. For regulatory reasons they need disaster recovery capability in a separate region with a Recovery Time Objective of 2 hours and a Recovery Point Objective of 24 hours. They should synchronize their data on a regular basis and be able to provision the web application rapidly using CloudFormation. The objective is to minimize changes to the existing web application, control the throughput of DynamoDB used for the synchronization of data, and synchronize only the modified elements. Which design would you choose to meet these requirements? 

A. Use AWS Data Pipeline to schedule a DynamoDB cross region copy once a day, create a "LastUpdated" attribute in your DynamoDB table that would represent the timestamp of the last update and use it as a filter 

B. Use AWS Data Pipeline to schedule an export of the DynamoDB table to S3 in the current region once a day, then schedule another task Immediately after it that will import data from S3 to DynamoDB in the other region 

C. Use EMR and write a custom script to retrieve data from DynamoDB in the current region using a SCAN operation and push it to DynamoDB in the second region 

D. Send also each write into an SQS queue in the second region, use an auto-scaling group behind the SQS queue to replay the write in the second region 

Answer: B 


Q6. Your company previously configured a heavily used, dynamically routed VPN connection between your on-premises data center and AWS. You recently provisioned a DirectConnect connection and would like to start using this new connection. After configuring DirectConnect settings in the AWS Console, which of the following options will provide the most seamless transition for your users? 

A. Configure your DirectConnect router, update your VPC route tables to point to the DirectConnect connection, configure your VPN connection with a higher BGP priority, and verify network traffic is leveraging the DirectConnect connection. 

B. Delete your existing VPN connection to avoid routing loops, configure your DirectConnect router with the appropriate settings, and verify network traffic is leveraging DirectConnect. 

C. Update your VPC route tables to point to the DirectConnect connection, configure your DirectConnect router with the appropriate settings, verify network traffic is leveraging DirectConnect, and then delete the VPN connection. 

D. Configure your DirectConnect router with a higher BGP priority than your VPN router, verify network traffic is leveraging DirectConnect, and then delete your existing VPN connection. 

Answer: A 


Q7. You have been asked to design the storage layer for an application. The application requires disk performance of at least 100,000 IOPS. In addition, the storage layer must be able to survive the loss of an individual disk, EC2 instance, or Availability Zone without any data loss. The volume you provide must have a capacity of at least 3 TB. Which of the following designs will meet these objectives? 

A. Instantiate a c3.8xlarge instance in us-east-1. Provision 4x1TB EBS volumes, attach them to the instance, and configure them as a single RAID 5 volume. Ensure that EBS snapshots are performed every 15 minutes. 

B. Instantiate a c3.8xlarge instance in us-east-1. Provision 3xlTB EBS volumes, attach them to the Instance, and configure them as a single RAID 0 volume. Ensure that EBS snapshots are performed every 15 minutes. 

C. Instantiate an i2.8xlarge instance in us-east-1a. Create a RAID 0 volume using the four 800GB SSD ephemeral disks provided with the instance. Provision 3x1TB EBS volumes, attach them to the instance, and configure them as a second RAID 0 volume. Configure synchronous, block-level replication from the ephemeral-backed volume to the EBS-backed volume. 

D. Instantiate a c3.8xlarge instance in us-east-1. Provision an AWS Storage Gateway and configure it for 3 TB of storage and 100,000 IOPS. Attach the volume to the instance. 

E. Instantiate an i2.8xlarge instance in us-east-1a. Create a RAID 0 volume using the four 800GB SSD ephemeral disks provided with the instance. Configure synchronous, block-level replication to an identically configured instance in us-east-1b. 

Answer: A 


Q8. 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 


Q9. 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: A 


Q10. 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