Amazon Amazon Certifications CLF-C02 Questions & Answers

• Question 511:

  A company is launching a new application in the AWS Cloud. The application will run on an Amazon EC2 instance. More EC2 instances will be needed when the workload increases.

  Which AWS service or tool can the company use to launch the number of EC2 instances that will be needed to handle the workload?

  A. Elastic Load Balancing

  B. Amazon EC2 Auto Scaling

  C. AWS App2Container (A2C)

  D. AWS Systems Manager

  Correct Answer: B

  Amazon EC2 Auto Scaling is the AWS service or tool that can help the company launch the number of EC2 instances that will be needed to handle the workload. Amazon EC2 Auto Scaling automatically adjusts the capacity of the EC2 instances based on the demand and the predefined scaling policies. Amazon EC2 Auto Scaling also helps to improve availability and reduce costs by scaling in and out as needed. For more information, see What is Amazon EC2 Auto Scaling? and [Getting Started with Amazon EC2 Auto Scaling].

• Question 512:

  A developer needs to build an application for a retail company. The application must provide real-time product recommendations that are based on machine learning.

  Which AWS service should the developer use to meet this requirement?

  A. AWS Health Dashboard

  B. Amazon Personalize

  C. Amazon Forecast

  D. Amazon Transcribe

  Correct Answer: B

  Amazon Personalize is a fully managed machine learning service that customers can use to generate personalized recommendations for their users. It can also generate user segments based on the users' affinity for certain items or item metadata. Amazon Personalize uses the customers' data to train and deploy custom recommendation models that can be integrated into their applications. Therefore, the correct answer is B. You can learn more about Amazon Personalize and its use cases from this page.

• Question 513:

  A company wants to ensure that two Amazon EC2 instances are in separate data centers with minimal communication latency between the data centers.

  How can the company meet this requirement?

  A. Place the EC2 instances in two separate AWS Regions connected with a VPC peering connection.

  B. Place the EC2 instances in two separate Availability Zones within the same AWS Region.

  C. Place one EC2 instance on premises and the other in an AWS Region. Then connect them by using an AWS VPN connection.

  D. Place both EC2 instances in a placement group for dedicated bandwidth.

  Correct Answer: B

  The correct answer is B because placing the EC2 instances in two separate Availability Zones within the same AWS Region is the best way to meet the requirement. Availability Zones are isolated locations within an AWS Region that have independent power, cooling, and networking. Users can launch their resources, such as Amazon EC2 instances, in multiple Availability Zones to increase the fault tolerance and resilience of their applications. Availability Zones within the same AWS Region are connected with low- latency, high-throughput, and highly redundant networking. The other options are incorrect because they are not the best ways to meet the requirement. Placing the EC2 instances in two separate AWS Regions connected with a VPC peering connection is not the best way to meet the requirement because AWS Regions are geographically dispersed and may have higher communication latency between them than Availability Zones within the same AWS Region. VPC peering connection is a networking connection between two VPCs that enables users to route traffic between them using private IP addresses. Placing one EC2 instance on premises and the other in an AWS Region, and then connecting them by using an AWS VPN connection is not the best way to meet the requirement because on-premises and AWS Region are geographically dispersed and may have higher communication latency between them than Availability Zones within the same AWS Region. AWS VPN connection is a secure and encrypted connection between a user's network and their VPC. Placing both EC2 instances in a placement group for dedicated bandwidth is not the best way to meet the requirement because a placement group is a logical grouping of instances within a single Availability Zone that enables users to launch instances with specific performance characteristics. A placement group does not ensure that the instances are in separate data centers, and it does not provide low-latency communication between instances in different Availability Zones. Reference: [Regions, Availability Zones, and Local Zones], [VPC Peering], [AWS VPN], [Placement Groups]

• Question 514:

  A company needs to run its existing custom, nonproduction workloads in the AWS Cloud quickly and cost-effectively.

  The workloads can recover from interruptions easily.

  Which pricing model should the company use?

  A. Reserved Instances

  B. On-Demand Instances

  C. Spot Instances

  D. Dedicated Hosts

  Correct Answer: C

  The correct answer is C because Spot Instances are the pricing model that enables the company to run its existing custom, nonproduction workloads in the AWS Cloud quickly and cost-effectively. Spot Instances are spare Amazon EC2 instances that are available at up to 90% discount compared to On-Demand prices. Spot Instances are suitable for stateless, fault-tolerant, and flexible workloads that can recover from interruptions easily. The other options are incorrect because they are not the pricing model that enables the company to run its existing custom, nonproduction workloads in the AWS Cloud quickly and cost-effectively. Reserved Instances are Amazon EC2 instances that are reserved for a specific period of time (one or three years) in exchange for a lower hourly rate. Reserved Instances are suitable for steady-state or predictable workloads that run for a long duration. On-Demand Instances are Amazon EC2 instances that are launched and billed at a fixed hourly rate. On-Demand Instances are suitable for short-term, irregular, or unpredictable workloads that cannot be interrupted. Dedicated Hosts are physical servers that are dedicated to a single customer. Dedicated Hosts are suitable for workloads that require regulatory compliance or data isolation. Reference: Amazon EC2 Instance Purchasing Options

• Question 515:

  A company deploys its application on Amazon EC2 instances. The application occasionally experiences sudden increases in demand. The company wants to ensure that its application can respond to changes in demand at the lowest possible cost.

  Which AWS service or tool will meet these requirements?

  A. AWS Auto Scaling

  B. AWS Compute Optimizer

  C. AWS Cost Explorer

  D. AWS Well-Architected Framework

  Correct Answer: A

  AWS Auto Scaling is the AWS service or tool that will meet the requirements of ensuring that the application can respond to changes in demand at the lowest possible cost. AWS Auto Scaling allows users to automatically adjust the number of Amazon EC2 instances based on the application's performance and availability needs. AWS Auto Scaling can also optimize costs by helping users select the most cost-effective EC2 instances for their application1

• Question 516:

  An Availability Zone consists of:

  A. one or more data centers in a single location.

  B. two or more data centers in multiple locations.

  C. one or more physical hosts in a single data center.

  D. two or more physical hosts in multiple data centers.

  Correct Answer: A

  The correct answer is A because an Availability Zone consists of one or more data centers in a single location. An Availability Zone is an isolated location within an AWS Region that has independent power, cooling, and networking. Each Availability Zone has one or more data centers that host the physical servers and storage devices that run the AWS services. The other options are incorrect because they are not accurate descriptions of an Availability Zone. Two or more data centers in multiple locations are not an Availability Zone, but rather multiple Availability Zones within an AWS Region. One or more physical hosts in a single data center are not an Availability Zone, but rather the components of a data center within an Availability Zone. Two or more physical hosts in multiple data centers are not an Availability Zone, but rather the components of multiple data centers within one or more Availability Zones. Reference: [Regions, Availability Zones, and Local Zones]

• Question 517:

  Which AWS service or tool can be used to consolidate payments for a company with multiple AWS accounts?

  A. AWS Cost and Usage Report

  B. AWS Organizations

  C. Cost Explorer

  D. AWS Budgets

  Correct Answer: B

  AWS Organizations is an account management service that enables you to consolidate multiple AWS accounts into an organization that you create and centrally manage. AWS Organizations includes consolidated billing and account management capabilities that enable you to better meet the budgetary, security, and compliance needs of your business1.

• Question 518:

  A company recently migrated to the AWS Cloud. The company needs to determine whether its newly imported Amazon EC2 instances are the appropriate size and type.

  Which AWS services can provide this information to the company? {Select TWO.)

  A. AWS Auto Scaling

  B. AWS Control Tower

  C. AWS Trusted Advisor

  D. AWS Compute Optimizer

  E. Amazon Forecast

  Correct Answer: CD

  AWS Trusted Advisor and AWS Compute Optimizer are the AWS services that can provide information to the company about whether its newly imported Amazon EC2 instances are the appropriate size and type. AWS Trusted Advisor is an online tool that provides best practices recommendations in five categories: cost optimization, performance, security, fault tolerance, and service limits. AWS Trusted Advisor can help users identify underutilized or idle EC2 instances, and suggest ways to reduce costs and improve performance. AWS Compute Optimizer is a service that analyzes the configuration and utilization metrics of EC2 instances and delivers recommendations for optimal instance types, sizes, and configurations. AWS Compute Optimizer helps users improve performance, reduce costs, and eliminate underutilized resources

• Question 519:

  Which design principle is achieved by following the reliability pillar of the AWS Well- Architected Framework?

  A. Vertical scaling

  B. Manual failure recovery

  C. Testing recovery procedures

  D. Changing infrastructure manually

  Correct Answer: C

  Testing recovery procedures is the design principle that is achieved by following the reliability pillar of the AWS Well-Architected Framework. The reliability pillar focuses on the ability of a system to recover from failures and prevent disruptions. Testing recovery procedures helps to ensure that the system can handle different failure scenarios and restore normal operations as quickly as possible. Testing recovery procedures also helps to identify and mitigate any risks or gaps in the system design and implementation. For more information, see [Reliability Pillar] and [Testing for Reliability].

• Question 520:

  Which AWS service or tool does AWS Control Tower use to create resources?

  A. AWS CloudFormation

  B. AWS Trusted Advisor

  C. AWS Directory Service

  D. AWS Cost Explorer

  Correct Answer: A

  AWS Control Tower uses AWS CloudFormation to create resources in your landing zone. AWS CloudFormation is a service that helps you model and set up your AWS resources using templates. AWS Control Tower supports creating AWS::ControlTower::EnabledControl resources in AWS CloudFormation. Therefore, the correct answer is A. You can learn more about AWS Control Tower and AWS CloudFormation from this page.