Which of the following are pillars of the AWS Well-Architected Framework? (Select TWO)
A. High availability B. Performance efficiency C. Cost optimization D. Going global in minutes E. Continuous development
Answer: B,C Explanation: The AWS Well-Architected Framework is a set of six pillars and lenses thathelp cloud architects design and run workloads in the cloud. The six pillars are: operationalexcellence, security, reliability, performance efficiency, cost optimization, and sustainability.Each pillar has a set of design principles and best practices that guide the architecturaldecisions. High availability is not a separate pillar, but a quality that can be achieved byapplying the principles of the reliability pillar. Going global in minutes and continuousdevelopment are not pillars of the framework, but possible benefits of using AWS servicesand following the framework’s recommendations. References: AWS Well-Architected -Build secure, efficient cloud applications, AWS Well-Architected Framework, The 6 Pillarsof the AWS Well-Architected Framework
Question # 122
Elasticity in the AWS Cloud refers to which of the following? (Select TWO.)
A. How quickly an Amazon EC2 instance can be restarted B. The ability to rightsized resources as demand shifts C. The maximum amount of RAM an Amazon EC2 instance can use D. The pay-as-you-go billing model E. How easily resources can be procured when they are needed
Answer: B,E Explanation:Elasticity in the AWS Cloud refers to the ability to acquire resources as you need them andrelease resources when you no longer need them. In the cloud, you want to do thisautomatically1. This means that you can rightsized resources as demand shifts, and youcan easily procure resources when they are needed. Elasticity is not related to how quicklyan Amazon EC2 instance can be restarted, the maximum amount of RAM an Amazon EC2instance can use, or the pay-as-you-go billing model. These are aspects of scalability,performance, and cost, respectively2.For more information on elasticity, you can refer to the following sources:Elasticity - AWS Well-Architected FrameworkElastic - Reactive Systems on AWSWhat is the difference between scalability and elasticity?
Question # 123
A company wants to automatically add and remove Amazon EC2 instances. The company wants the EC2 instances to adjust to varying workloads dynamically. Which service or feature will meet these requirements?
A. Amazon DynamoDB B. Amazon EC2 Spot Instances C. AWS Snow Family D. Amazon EC2 Auto Scaling
Answer: D Explanation: Amazon EC2 Auto Scaling is a service that helps you maintain applicationavailability and allows you to automatically add or remove EC2 instances according todefinable conditions. You can create collections of EC2 instances, called Auto Scalinggroups, and specify the minimum and maximum number of instances in each group. Youcan also define scaling policies that adjust the number of instances based on the demandon your application. Amazon EC2 Auto Scaling helps you improve the performance,reliability, and cost-efficiency of your EC2 workloads123. References: 1: VDI Desktops -Amazon WorkSpaces Family - AWS, 2: What is Amazon EC2 Auto Scaling? - Amazon EC2Auto Scaling, 3: Discover Amazon EC2 Auto Scaling Unit | Salesforce Trailhead
Question # 124
A company wants to create a globally accessible ecommerce platform for its customers. The company wants to use a highly available and scalable DNS web service to connect users to the platform. Which AWS service will meet these requirements?
A. Amazon EC2 B. Amazon VPC C. Amazon Route 53 D. Amazon RDS
Answer: C Explanation: Amazon Route 53 is a highly available and scalable Domain Name System(DNS) web service that can route internet traffic to the company’s ecommerceplatform1. Route 53 can also register domain names, check the health of resources, andprovide global DNS features2. Route 53 can connect users to the platform by translatinghuman-readable names like www.example.com into the numeric IP addresses thatcomputers use to communicate with each other2. References: 1: Amazon Route 53 | DNSService | AWS; 2: What is Amazon Route 53? - Amazon Route 53
Question # 125
A company needs a bridge between technology and business to help evolve to a culture of continuous growth and learning. Which perspective in the AWS Cloud Adoption Framework (AWS CAF) serves as this bridge?
A. People B. Governance C. Operations D. Security
Answer: A Explanation: The People perspective in the AWS Cloud Adoption Framework (AWS CAF)serves as a bridge between technology and business, accelerating the cloud journey tohelp organizations more rapidly evolve to a culture of continuous growth, learning, andwhere change becomes business-as-normal, with focus on culture, organizationalstructure, leadership, and workforce1. References: People Perspective - AWS CloudAdoption Framework
Question # 126
Which AWS service or tool helps users visualize, understand, and manage spending and usage over time?
A. AWS Organizations B. AWS Pricing Calculator C. AWS Cost Explorer D. AWS Service Catalog
Answer: C Explanation: AWS Cost Explorer is the AWS service or tool that helps users visualize, understand, and manage spending and usage over time. AWS Cost Explorer is a webbased interface that allows users to access interactive graphs and tables that display their AWS costs and usage data. Users can create custom reports that analyze cost and usage data by various dimensions, such as service, region, account, tag, and more. Users can also view historical data for up to the last 12 months, forecast future costs for up to the next 12 months, and get recommendations for cost optimization. AWS Cost Explorer also provides preconfigured views that show common cost and usage scenarios, such as monthly spend by service, daily spend by linked account, and Reserved Instance utilization. Users can use AWS Cost Explorer to monitor their AWS spending and usage trends, identify cost drivers and anomalies, and optimize their resource allocation and budget planning. References: Cloud Cost Analysis - AWS Cost Explorer - AWS, Analyzing your costs with AWS Cost Explorer
Question # 127
Which of the following is a software development framework that a company can use to define cloud resources as code and provision the resources through AWS CloudFormation?
A. AWS CLI B. AWS Developer Center C. AWS Cloud Development Kit (AWS CDK) D. AWS CodeStar
Answer: C Explanation: AWS Cloud Development Kit (AWS CDK) is a software developmentframework that allows you to define cloud resources as code using familiar programminglanguages, such as TypeScript, Python, Java, .NET, and Go (in Developer Preview). Youcan use AWS CDK to model your application resources using high-level constructs thatprovide sensible defaults and best practices, or use low-level constructs that provide fullaccess to the underlying AWS CloudFormation resources. AWS CDK synthesizes yourcode into AWS CloudFormation templates that you can deploy using the AWS CDK CLI orthe AWS Management Console. AWS CDK also integrates with other AWS services, suchas AWS CodeCommit, AWS CodeBuild, AWS CodePipeline, AWS Lambda, Amazon EC2,Amazon S3, and more, to help you automate your development and deploymentprocesses. AWS CDK is an open-source framework that you can extend and contributeto. References: Cloud Development Framework - AWS Cloud Development Kit -AWS, AWS Cloud Development Kit Documentation, AWS Cloud Development Kit -Wikipedia, AWS CDK Intro Workshop | AWS CDK Workshop
Question # 128
A company wants to migrate its database to a managed AWS service that is compatible with PostgreSQL. Which AWS services will meet these requirements? (Select TWO)
A. Amazon Athena B. Amazon RDS C. Amazon EC2 D. Amazon DynamoDB E. Amazon Aurora
Answer: B,E Explanation: Amazon RDS and Amazon Aurora are both managed AWS services thatsupport the PostgreSQL database engine. Amazon RDS makes it easier to set up, operate,and scale PostgreSQL deployments on the cloud, while Amazon Aurora is a cloud-nativedatabase engine that is compatible with PostgreSQL and offers higher performance andavailability. Amazon Athena is a serverless query service that does not supportPostgreSQL, but can analyze data in Amazon S3 using standard SQL. Amazon EC2 is acompute service that allows users to launch virtual machines, but does not provide anydatabase management features. Amazon DynamoDB is a NoSQL database service that isnot compatible with PostgreSQL, but offers fast and consistent performance at anyscale. References: Hosted PostgreSQL - Amazon RDS for PostgreSQL - AWS, AmazonRDS for PostgreSQL - Amazon Relational Database Service, AWS PostgreSQL: Managedor Self-Managed? - NetApp, AWS Announces Amazon Aurora Supports PostgreSQL 12 InfoQ, Amazon Aurora vs PostgreSQL | What are the differences? - StackShare
Question # 129
A company wants to establish a private network connection between AWS and its corporate network. Which AWS service or feature will meet this requirement?
A. Amazon Connect B. Amazon Route 53 C. AWS Direct Connect D. VPC peering
Answer: C Explanation: AWS Direct Connect is a cloud service solution that makes it easy toestablish a dedicated network connection from your premises to AWS. Using AWS DirectConnect, you can establish private connectivity between AWS and your datacenter, office,or colocation environment, which in many cases can reduce your network costs, increasebandwidth throughput, and provide a more consistent network experience than internetbasedconnections12. References: 1: Dedicated Network Connection - AWS DirectConnect - AWS, 2: What is AWS Direct Connect? - AWS Direct Connect
Question # 130
What is a benefit of using AWS serverless computing?
A. Application deployment and management are not required B. Application security will be fully managed by AWS C. Monitoring and logging are not needed D. Management of infrastructure is offloaded to AWS
Answer: D Explanation: AWS serverless computing is a way of building and running applicationswithout thinking about servers. AWS manages the infrastructure for you, so you don’t haveto provision, scale, patch, or monitor servers. You only pay for the compute time youconsume, and you can focus on your application logic instead of managingservers12. References: Serverless Computing – Amazon Web Services, AWS ServerlessComputing, Benefits, Architecture and Use-cases - XenonStack