aws solution architect associate dumps : Jul 2017 Edition

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Q271. What are the Amazon EC2 API tools?

A. They don't exist. The Amazon EC2 AMI tools, instead, are used to manage permissions.

B. Command-line tools to the Amazon EC2 web service.

C. They are a set of graphical tools to manage EC2 instances.

D. They don't exist. The Amazon API tools are a client interface to Amazon Web Senrices. 

Answer: B

Q272. An organization has developed a mobile application which allows end users to capture a photo on their mobile device, and store it inside an application. The application internally uploads the data to AWS S3. The organization wants each user to be able to directly upload data to S3 using their Google ID. How will the mobile app allow this?

A. Use the AWS Web identity federation for mobile applications, and use it to generate temporary security credentials for each user.

B. It is not possible to connect to AWS S3 with a Google ID.

C. Create an IAM user every time a user registers with their Google ID and use IAM to upload files to S3.

D. Create a bucket policy with a condition which allows everyone to upload if the login ID has a Google part to it.



For Amazon Web Services, the Web identity federation allows you to create cloud-backed mobile apps that use public identity providers, such as login with Facebook, Google, or Amazon. It will create temporary security credentials for each user, which will be authenticated by the AWS services, such as S3.


Q273. Your company hosts a social media site supporting users in multiple countries. You have been asked to provide a highly available design tor the application that leverages multiple regions tor the most recently accessed content and latency sensitive portions of the wet) 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 app|ication's requirements?

A. Serve user content from 53. CIoudFront 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 505 workers for propagating updates to each table.

B. Use the 53 Copy API to copy recently accessed content to multiple regions and serve user content from 53. C|oudFront with dynamic content and an ELB in each region Retrieve user preferences from an EIasticCache cluster in each region and leverage SNS notifications to propagate user preference changes to a worker node in each region.

C. Use the 53 Copy API to copy recently accessed content to multiple regions and serve user content from 53 CIoudFront 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 505 workers for propagating DynamoDB updates.

D. Serve user content from 53. CIoudFront with dynamic content, and an ELB in each region Retrieve user preferences from an EIastiCache cluster in each region and leverage Simple Workflow (SWF) to manage the propagation of user preferences from a centralized OB to each EIastiCache cluster.

Answer: A

Q274. 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 CONs 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. Configure a web proxy server in your VPC and enforce URL-based ru les for outbound access Remove

default routes.

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

C. 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.

D. Implement network access control lists to all specific destinations, with an Implicit deny as a rule. 

Answer: A

Q275. 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 Cloud Watch monitors the number of Job requests (queued messages) and an Auto Scaling group adds or deletes

batch sewers automatically based on parameters set in Cloud Watch alarms. You can use this architecture to implement which of the following features in a cost effective and efficient manner?

A. Reduce the overall lime 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.

B. Implement fault tolerance against EC2 instance failure since messages would remain in SQS and worn can continue with recovery of EC2 instances implement fault tolerance against SQS failure by backing up messages to 53.

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

D. Coordinate number of EC2 instances with number of job requests automatically thus Improving cost effectiveness.

E. Handle high priority jobs before lower priority jobs by assigning a priority metadata fie Id to SQS messages.




There are cases where a large number of batch jobs may need processing, and where the jobs may need to be re-prioritized.

For example, one such case is one where there are differences between different levels of services for unpaid users versus subscriber users (such as the time until publication) in services enabling, for example, presentation fi les to be uploaded for publication from a web browser. When the user uploads a presentation file, the conversion processes, for example, for publication are performed as batch

processes on the system side, and the file is published after the conversion. Is it then necessary to be able to assign the level of priority to the batch processes for each type of subscriber.

Explanation of the Cloud Solution/Pattern

A queue is used in controlling batch jobs. The queue need only be provided with priority numbers. Job requests are controlled by the queue, and the job requests in the queue are processed by a batch server. In Cloud computing, a highly reliable queue is provided as a service, which you can use to

structure a highly reliable batch system with ease. You may prepare multiple queues depending on priority levels, with job requests put into the queues depending on their priority levels, to apply prioritization to batch processes. The performance (number) of batch servers corresponding to a queue must be in accordance with the priority level thereof.


In AWS, the queue service is the Simple Queue Service (SQS). MuItipIe SQS queues may be prepared to prepare queues for indMdual priority levels (with a priority queue and a secondary queue).

Moreover, you may also use the message Delayed Send function to delay process execution. Use SQS to prepare multiple queues for the indMdual priority levels.

Place those processes to be executed immediately (job requests) in the high priority queue. Prepare numbers of batch servers, for processing the job requests of the queues, depending on the priority levels.

Queues have a message "Delayed Send" function. You can use this to delay the time for starting a process.



You can increase or decrease the number of servers for processing jobs to change automatically the processing speeds of the priority queues and secondary queues.

You can handle performance and service requirements through merely increasing or decreasing the number of EC2 instances used in job processing.

Even if an EC2 were to fail, the messages (jobs) would remain in the queue service, enabling processing to be continued immediately upon recovery of the EC2 instance, producing a system that is robust to failure.


Depending on the balance between the number of EC2 instances for performing the processes and the number of messages that are queued, there may be cases where processing in the secondary queue may be completed first, so you need to monitor the processing speeds in the primary queue and the secondary queue.

Q276. Amazon SWF is designed to help users

A. Design graphical user interface interactions

B. Manage user identification and authorization

C. Store Web content

D. Coordinate synchronous and asynchronous tasks which are distributed and fault tolerant. 

Answer: D

Q277. 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 (Basic Available. Sort stale 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. Use an Amazon Elastic Map Reduce (EMR) S3DistCp as a synchronization mechanism between the on-premises database and a Hadoop cluster on AWS.

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

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

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




Q278. 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 me web application rapidly using CIoudFormation.

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 Last updated' attribute in your DynamoDB table that would represent the timestamp of the last update and use it as a filter.

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

C. Use AWS data Pipeline to schedule an export of the DynamoDB table to 53 in the current region once a day then schedule another task immediately after it that will import data from 53 to DynamoDB in the other region.

D. Send also each Ante into an SOS queue in me second region; use an auto-scaling group behind the SOS queue to replay the write in the second region.

Answer: A

Q279. A user wants to use an EBS-backed Amazon EC2 instance for a temporary job. Based on the input data,  the job is most likely to finish within a week. Which of the following steps should be followed to terminate the instance automatically once the job is finished?

A. Configure the EC2 instance with a stop instance to terminate it.

B. Configure the EC2 instance with ELB to terminate the instance when it remains idle.

C. Configure the CIoudWatch alarm on the instance that should perform the termination action once the instance is idle.

D. Configure the Auto Scaling schedule actMty that terminates the instance after 7 days. 

Answer: C


Auto Scaling can start and stop the instance at a pre-defined time. Here, the total running time is unknown. Thus, the user has to use the CIoudWatch alarm, which monitors the CPU utilization. The user can create an alarm that is triggered when the average CPU utilization percentage has been lower than 10 percent

for 24 hours, signaling that it is idle and no longer in use. When the utilization is below the threshold limit, it will terminate the instance as a part of the instance action.


Q280. A user is planning to host a mobile game on EC2 which sends notifications to active users on either high score or the addition of new features. The user should get this notification when he is online on his mobile device. Which of the below mentioned AWS services can help achieve this functionality?

A. AWS Simple Notification Service.

B. AWS Simple Email Service.

C. AWS Nlobile Communication Service.

D. AWS Simple Queue Service.

Answer: A


Amazon Simple Notification Service (Amazon SNS) is a fast, filexible, and fully managed push messaging service. Amazon SNS makes it simple and cost-effective to push to mobile devices, such as iPhone, iPad, Android, Kindle Fire, and internet connected smart devices, as well as pushing to other distributed  services.


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