AWS-Certified-Solutions-Architect-Professional Exam
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Q1. A web company is looking to implement an external payment service into their highly available application deployed in a VPC. Their application EC2 instances are behind a public facing ELB. Auto Scaling is used to add additional instances as traffic Increases. Under normal load the application runs 2 Instances in the Auto Scaling group but at peak it can scale 3x in size. The application instances need to communicate with the payment service over the Internet, which requires whitelisting of all public IP addresses used to communicate with it. A maximum of 4 whitelisted IP addresses are allowed at a time and can be added through an API. How should they architect their solution?
A. Whitelist the VPC Internet Gateway Public IP and route payment requests through the Internet Gateway.
B. Automatically assign public IP addresses to the application instances in the Auto Scaling group and run a script on boot that adds each instances public IP address to the payment validation whitelist API.
C. Route payment requests through two NAT instances setup for High Availability and whitelist the Elastic IP addresses attached to the NAT instances.
D. Whitelist the ELB IP addresses and route payment requests from the Application servers through the ELB.
Answer: A
Q2. A corporate web application is deployed within an Amazon Virtual Private Cloud (VPC), and is connected to the corporate data center via an IPsec VPN. The application must authenticate against the on- premises LDAP server. After authentication, each logged-in user can only access an Amazon Simple Storage Space (S3) keyspace specific to that user. Which two approaches can satisfy these objectives? Choose 2 answers
A. The application authenticates against IAM Security Token Service using the LDAP credentials. The application uses those temporary AWS security credentials to access the appropriate S3 bucket.
B. Develop an identity broker that authenticates against LDAP, and then calls IAM Security Token Service to get IAM federated user credentials. The application calls the Identity broker to get IAM federated user credentials with access to the appropriate S3 bucket.
C. The application authenticates against LDAP, and retrieves the name of an IAM role associated with the user. The application then calls the IAM Security Token Service to assume that IAM role. The application can use the temporary credentials to access the appropriate S3 bucket.
D. The application authenticates against LDAP. The application then calls the AWS Identity and Access Management (IAM) Security Service to log in to IAM using the LDAP credentials. The application can use the IAM temporary credentials to access the appropriate S3 bucket.
E. Develop an identity broker that authenticates against IAM Security Token Service to assume an IAM role in order to get temporary AWS security credentials. The application calls the identity broker to get AWS temporary security credentials with access to the appropriate S3 bucket.
Answer: A, 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. You have launched an EC2 instance with four (4) 500 GB EBS Provisioned IOPS volumes attached. The EC2 instance is EBS-Optimized and supports 500 Mbps throughput between EC2 and EBS. The four EBS volumes are configured as a single RAID 0 device, and each Provisioned IOPS volume is provisioned with 4,000 IOPS (4,000 16KB reads or writes), for a total of 16,000 random IOPS on the instance. The EC2 instance initially delivers the expected 16,000 IOPS random read and write performance. Sometime later, in order to increase the total random I/O performance of the instance, you add an additional two 500 GB EBS Provisioned IOPS volumes to the RAID. Each volume is provisioned to 4,000 IOPs like the original four, for a total of 24,000 IOPS on the EC2 instance. Monitoring shows that the EC2 instance CPU utilization increased from 50% to 70%, but the total random IOPS measured at the instance level does not increase at all. What is the problem and a valid solution?
A. The EBS-Optimized throughput limits the total IOPS that can be utilized; use an EBS-Optimized instance that provides larger throughput.
B. Small block sizes cause performance degradation, limiting the I/O throughput; configure the instance device driver and file system to use 64KB blocks to increase throughput.
C. The standard EBS Instance root volume limits the total IOPS rate; change the instance root volume to also be a 500GB 4,000 Provisioned IOPS volume.
D. Larger storage volumes support higher Provisioned IOPS rates; increase the provisioned volume storage of each of the 6 EBS volumes to 1TB.
E. RAID 0 only scales linearly to about 4 devices; use RAID 0 with 4 EBS Provisioned IOPS volumes, but increase each Provisioned IOPS EBS volume to 6,000 IOPS.
Answer: C
Q5. 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
Q6. Your startup wants to implement an order fulfillment process for selling a personalized gadget that needs an average of 3-4 days to produce with some orders taking up to 6 months. You expect 10 orders per day on your first day, 1000 orders per day after 6 months and 10,000 orders after 12 months. Orders coming in are checked for consistency, then dispatched to your manufacturing plant for production, quality control, packaging, shipment and payment processing. If the product does not meet the quality standards at any stage of the process, employees may force the process to repeat a step. Customers are notified via email about order status and any critical issues with their orders such as payment failure. Your base architecture includes AWS Elastic Beanstalk for your website with an RDS MySQL instance for customer data and orders. How can you implement the order fulfillment process while making sure that the emails are delivered reliably?
A. Add a business process management application to your Elastic Beanstalk app servers and re-use the RDS database for tracking order status. Use one of the Elastic Beanstalk instances to send emails to customers.
B. Use SWF with an Auto Scaling group of activity workers and a decider instance in another Auto Scaling group with min/max=1. Use SES to send emails to customers.
C. Use an SQS queue to manage all process tasks. Use an Auto Scaling group of EC2 instances that poll the tasks and execute them. Use SES to send emails to customers.
D. Use SWF with an Auto Scaling group of activity workers and a decider instance in another Auto Scaling group with min/max=1. Use the decider instance to send emails to customers.
Answer: B
Q7. 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
Q8. 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: C
Q9. 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
Q10. You are the new IT architect in a company that operates a mobile sleep tracking application. When activated at night, the mobile app is sending collected data points of 1 kilobyte every 5 minutes to your backend. The backend takes care of authenticating the user and writing the data points into an Amazon DynamoDB table. Every morning, you scan the table to extract and aggregate last night's data on a per user basis, and store the results in Amazon S3. Users are notified via Amazon SNS mobile push notifications that new data is available, which is parsed and visualized by the mobile app. Currently you have around 100k users who are mostly based out of North America. You have been tasked to optimize the architecture of the backend system to lower cost. What would you recommend? Choose 2 answers
A. Have the mobile app access Amazon DynamoDB directly Instead of JSON files stored on Amazon S3.
B. Write data directly into an Amazon Redshift cluster replacing both Amazon DynamoDB and Amazon S3.
C. Introduce an Amazon SQS queue to buffer writes to the Amazon DynamoDB table and reduce provisioned write throughput.
D. Introduce Amazon Elasticache to cache reads from the Amazon DynamoDB table and reduce provisioned read throughput.
E. Create a new Amazon DynamoDB table each day and drop the one for the previous day after its data is on Amazon S3.
Answer: A, D