Amazon CLF-C02 Online Practice Questions and Exam Preparation

Amazon CLF-C02 Online Questions & Answers

• Question 821:

  Which factors affect costs in the AWS Cloud? (Select TWO.)

  A. The number of unused AWS Lambda functions
  B. The number of configured Amazon S3 buckets
  C. Inbound data transfers without acceleration
  D. Outbound data transfers without acceleration
  E. Compute resources that are currently in use
  D. Outbound data transfers without acceleration
  E. Compute resources that are currently in use

  ---

  Explanation

  Outbound data transfers without acceleration and compute resources that are currently in use are the factors that affect costs in the AWS Cloud. Outbound data transfers without acceleration refer to the amount of data that is transferred from AWS to the internet, without using any service that can optimize the speed and cost of the data transfer, such as AWS Global Accelerator or Amazon CloudFront. Outbound data transfers are charged at different rates depending on the source and destination AWS Regions, and the volume of data transferred. Compute resources that are currently in use refer to the AWS services and resources that provide computing capacity, such as Amazon EC2 instances, AWS Lambda functions, or Amazon ECS tasks. Compute resources are charged based on the type, size, and configuration of the resources, and the duration and frequency of their usage.

• Question 822:

  A company is using Amazon DynamoDB for its application database.

  Which tasks are the responsibility of AWS, according to the AWS shared responsibility model? (Choose two.)

  A. Classify data.
  B. Configure access permissions.
  C. Manage encryption options.
  D. Provide public endpoints to store and retrieve data.
  E. Manage the infrastructure layer and the operating system.
  D. Provide public endpoints to store and retrieve data.
  E. Manage the infrastructure layer and the operating system.

  ---

  Explanation

  According to the AWS shared responsibility model, AWS is responsible for security of the cloud, while customers are responsible for security in the cloud. This means that AWS is responsible for protecting the infrastructure that runs AWS services, such as hardware, software, networking, and facilities. Customers are responsible for managing their data, classifying their assets, and using IAM tools to apply the appropriate permissions. For abstracted services, such as Amazon DynamoDB, AWS operates the infrastructure layer, the operating system, and platforms, and provides customers with public endpoints to store and retrieve data. Customers are responsible for classifying their data, managing their encryption options, and configuring their access permissions.

• Question 823:

  A company's application is running on Amazon EC2 instances. The company is planning a partial migration to a serverless architecture in the next year and wants to pay for resources up front.

  Which AWS purchasing option will optimize the company's costs?

  A. Convertible Reserved Instances
  B. Spot Instances
  C. EC2 Instance Savings Plans
  D. Compute Savings Plan
  D. Compute Savings Plan

  ---

  Explanation

  Compute Savings Plans offer up to 66% cost savings in exchange for a 1- or 3-year commitment to a specific amount of compute usage per hour. They apply not only to EC2 but also to AWS Fargate and AWS Lambda, making them ideal for a company planning a partial migration to a serverless architecture. This option provides the flexibility to continue benefiting from cost savings as the workload shifts from EC2 to serverless services.

  Convertible Reserved Instances allow instance type flexibility but only apply to EC2, making them less suitable for a serverless transition. Spot Instances offer steep discounts but come with the risk of interruption, which is not ideal for predictable or production workloads. EC2 Instance Savings Plans are limited to EC2 usage and don’t apply to serverless services like Lambda or Fargate, reducing their long-term value in this scenario.

  Therefore, Compute Savings Plan is the best option to optimize costs while supporting a future move to serverless.

• Question 824:

  How can a user protect an Amazon EC2 instance from a suspicious IP address?

  A. Block the IP on the inbound rule of a network ACL.
  B. Block the IP on the outbound rule of a security group.
  C. Block the IP on the inbound rule of a security group and network ACL.
  D. Block the IP on the outbound rule of a security group and network ACL.
  A. Block the IP on the inbound rule of a network ACL.

  ---

  Explanation

• Question 825:

  Which AWS service or tool helps companies measure the environmental impact of their AWS usage?

  A. AWS customer carbon footprint tool
  B. AWS Compute Optimizer
  C. Sustainability pillar
  D. OS-Climate (Open Source Climate Data Commons)
  A. AWS customer carbon footprint tool

  ---

  Explanation

  AWS customer carbon footprint tool is an AWS service or tool that helps companies measure the environmental impact of their AWS usage. It allows users to estimate the carbon emissions associated with their AWS resources and services, such as EC2, S3, and Lambda. It also provides recommendations and best practices to reduce the carbon footprint and improve the sustainability of their AWS workloads4. AWS Compute Optimizer is an AWS service that helps users optimize the performance and cost of their EC2 instances and Auto Scaling groups. It provides recommendations for optimal instance types, sizes, and configurations based on the workload characteristics and utilization metrics. It does not help users measure the environmental impact of their AWS usage. Sustainability pillar is a concept that refers to the ability of a system to operate in an environmentally friendly and socially responsible manner. It is not an AWS service or tool that helps users measure the environmental impact of their AWS usage. OS-Climate (Open Source Climate Data Commons) is an initiative that aims to provide open source data, tools, and platforms to accelerate climate action and innovation. It is not an AWS service or tool that helps users measure the environmental impact of their AWS usage.

• Question 826:

  A company wants an in-memory data store that is compatible with open source in the cloud.

  Which AWS service should the company use?

  A. Amazon DynamoDB
  B. Amazon ElastiCache
  C. Amazon Elastic Block Store (Amazon EBS)
  D. Amazon Redshift
  B. Amazon ElastiCache

  ---

  Explanation

  Amazon ElastiCache is a fully managed in-memory data store service that is compatible with open source engines such as Redis and Memcached1. It provides fast and scalable performance for applications that require high throughput and low latency1. Amazon DynamoDB is a fully managed NoSQL database service that provides consistent and single-digit millisecond latency at any scale2. Amazon EBS is a block storage service that provides persistent and durable storage volumes for Amazon EC2 instances3. Amazon Redshift is a fully managed data warehouse service that allows users to run complex analytic queries using SQL4.

• Question 827:

  A company needs an AWS Support plan that provides programmatic case management through the AWS Support API.

  Which support plan will meet this requirement MOST cost-effectively?

  A. AWS Business Support
  B. AWS Basic Support
  C. AWS Developer Support
  D. AWS Enterprise Support
  A. AWS Business Support

  ---

  Explanation

• Question 828:

  A company uses AWS security services and tools. The company needs a service to help manage the security alerts and must organize the alerts into a single dashboard.

  Which AWS service should the company use to meet these requirements?

  A. Amazon GuardDuty
  B. Amazon Inspector
  C. Amazon Macie
  D. AWS Security Hub
  D. AWS Security Hub

  ---

  Explanation

• Question 829:

  A company moves a workload to AWS to run on Amazon EC2 instances. The company needs to run the workload in the most cost-effective way.

  What can the company do to meet this requirement?

  A. Use AWS Key Management Service (AWS KMS).
  B. Use multiple AWS accounts and consolidated billing.
  C. Use AWS CloudFormation to deploy the infrastructure.
  D. Rightsized all the EC2 instances that are used in the deployment.
  D. Rightsized all the EC2 instances that are used in the deployment.

  ---

  Explanation

  Rightsizing all the EC2 instances that are used in the deployment is the best way to run the workload in the most cost-effective way. Rightsizing means choosing the optimal instance type and size for the workload based on the performance and capacity requirements. Rightsizing helps to avoid over-provisioning or under-provisioning of the EC2 instances, which can result in wasted resources or poor performance. Rightsizing also helps to take advantage of the different pricing models and features that AWS offers, such as On-Demand, Reserved, and Spot Instances, and Auto Scaling. For more information, see Rightsizing Your Instances and [Cost Optimization with AWS].

• Question 830:

  A company is running applications on Amazon EC2 instances in the same AWS account for several different projects. The company wants to track the infrastructure costs for each of the projects separately. The company must conduct this tracking with the least possible impact to the existing infrastructure and with no additional cost.

  What should the company do to meet these requirements?

  A. Use a different EC2 instance type for each project.
  B. Publish project-specific custom Amazon CloudWatch metrics for each application.
  C. Deploy EC2 instances for each project in a separate AWS account.
  D. Use cost allocation tags with values that are specific to each project.
  D. Use cost allocation tags with values that are specific to each project.

  ---

  Explanation

  The correct answer is D because cost allocation tags are a way to track the infrastructure costs for each of the projects separately. Cost allocation tags are key-value pairs that can be attached to AWS resources, such as EC2 instances, and used to categorize and group them for billing purposes. The other options are incorrect because they do not meet the requirements of the question. Use a different EC2 instance type for each project does not help to track the costs for each project, and may impact the performance and compatibility of the applications. Publish project-specific custom Amazon CloudWatch metrics for each application does not help to track the costs for each project, and may incur additional charges for using CloudWatch. Deploy EC2 instances for each project in a separate AWS account does help to track the costs for each project, but it impacts the existing infrastructure and incurs additional charges for using multiple accounts.

  Using Cost Allocation Tags