AWS Certified Solutions Architect - Associate (SAA-C03) - 1

You work for an online retailer where any downtime at all can cause a significant loss of revenue. You have architected your application to be deployed on an Auto Scaling Group of EC2 instances behind a load balancer. You have configured and deployed these resources using a CloudFormation template. The Auto Scaling Group is configured with default settings and a simple CPU utilization scaling policy. You have also set up multiple Availability Zones for high availability. The load balancer does health checks against an HTML file generated by script. When you begin performing load testing on your application and notice in CloudWatch that the load balancer is not sending traffic to one of your EC2 instances. What could be the problem?

• The EC2 instance has failed the load balancer health check.

• The instance has not been registered with CloudWatch.

• The EC2 instance has failed EC2 status checks.

• You are load testing at a moderate traffic level and not all instances are needed.

Your company has performed a Disaster Recovery drill which failed to meet the Recovery Time Objective (RTO) desired by executive management. The failure was due in large part to the amount of time taken to restore proper functioning on the database side. You have given management a recommendation of implementing synchronous data replication for the RDS database to help meet the RTO. Which of these options can perform synchronous data replication in RDS?

• RDS Multi-AZ

• Read replicas

• DAX

• AWS Database Migration Service

You work for an advertising company that has a real-time bidding application. You are also using CloudFront on the front end to accommodate a worldwide user base. Your users begin complaining about response times and pauses in real-time bidding. What is the best service that can be used to reduce DynamoDB response times by an order of magnitude (milliseconds to microseconds)?

• CloudFront Edge Caches

• ElastiCache

• DynamoDB Auto Scaling

• DAX

You work for a large healthcare provider as an AWS lead architect. There is a need to collect data in real-time from devices throughout the organization. The data will include log and event data from sources such as servers, desktops, and mobile devices. The data initially captured will be technical device data, but the goal is to expand the effort to collecting clinical data in real-time from handheld devices used by nurses and doctors. Which AWS service best meets this requirement?

• Kinesis Video Streams

• AWS Lambda

• 
  

  AWS Redshift

• Kinesis Data Streams

A new startup is considering the advantages of using Amazon DynamoDB versus a traditional relational database in AWS RDS. The NoSQL nature of DynamoDB presents a small learning curve to the team members who all have experience with traditional databases. The company will have multiple databases, and the decision will be made on a case-by-case basis. Which of the following use cases would favor Amazon DynamoDB?

(Choose3)

• Strong referential integrity between tables

• Managing web session data

• Storing metadata for S3 objects

• Storing binary large object (BLOB) data

• High-performance reads and writes for online transaction processing (OLTP) workloads

After an IT Steering Committee meeting, you have been put in charge of configuring a hybrid environment for the company’s compute resources. You weigh the pros and cons of various technologies, such as VPN and Direct Connect, and based on the requirements you have decided to configure a VPN connection. What features and advantages can a VPN connection provide?

• 
  

  It provides a network connection between two VPCs that can route traffic using IPv4 or IPv6.

• It provides a cost-effective, private network connection that bypasses the internet.

• 
  

  It provides a connection between an on-premises network and a VPC, using a secure and private connection with IPsec and TLS.

• It provides a private, dedicated network connection between an on-premises network and the VPC.

You are designing a new application for a social media gaming company and they want to be able to use people’s facebook account to login and to sign up to the new app. They’ve asked that you use Cognito to achieve this. However, management wants to know the steps involved for user authentication. Which of the steps below is the correct order to authenticate with Cognito?

• Step 1 - Exchange tokens and get AWS credentials. Step 2 - Access AWS services using credentials. Step 3 - Authenticate and get tokens.

• 
  

  Step 1 - Authenticate and get tokens. Step 2 - Exchange tokens and get AWS credentials. Step 3 - Access AWS services using credentials.

• Step 1 - Access AWS services using credentials. Step 2 - Exchange tokens and get AWS credentials. Step 3 - Authenticate and get tokens.

• Step 1 - Exchange tokens and get AWS credentials. Step 2 - Authenticate and get tokens. Step 3 - Access AWS services using credentials.

A gaming company is designing several new games which focus heavily on player-game interaction. The player makes a certain move and the game has to react very quickly to change the environment based on that move and to present the next decision for the player in real-time. A tool is needed to continuously collect data about player-game interactions and feed the data into the gaming platform in real-time. Which AWS service can best meet this need?

• AWS IoT

• Kinesis Data Analytics

• 
  

  Kinesis Data Streams

• AWS Lambda

Currently, you are employed as a solutions architect for a large international shipping company. The company is undergoing an IT transformation and they want to create an immutable database, where they can track packages as they are sent around the world. They will need to track what boxes they go in, what trucks they are sent in, and what aircraft or sea containers they are shipped in. The database needs to be immutable and cryptographically verifiable, and they would like to leverage the AWS cloud to achieve this. What database technology would best suit this requirement?

• RDS

• Aurora

• 
  

  Amazon Quantum Ledger Database (QLDB)

• Neptune

A software company has developed a social gaming application that leverages EC2 web servers with Amazon DynamoDB to store player data, session history, and leaderboards for a huge number of concurrent users. The DynamoDB table has pre-configured read and write capacity units. Users have been reporting slowdown issues, and an analysis has revealed that the application requires response times in microseconds for optimal performance. What step can you take to enable this application to handle read-heavy or bursty workloads, while delivering the fastest possible response time for eventually consistent read operations?

• Add a load balancer in front of the EC2 web servers to decouple your application requests synchronously, improving performance for read-heavy and bursty workloads.

• Implement in-memory acceleration with DynamoDB Accelerator (DAX).

• Deploy Amazon CloudFront to your architecture, so you can cache common Amazon DynamoDB queries and reduce response time to microseconds.

• Configure Amazon SQS to queue requests that could be lost and improve the application response time.