Amazon CLF-C02 Practice Test - Questions Answers, Page 70

For workloads running 24/7 for a year, Standard Reserved Instances provide a significant discount compared to On-Demand pricing. Choosing the 'All Upfront' payment option maximizes the cost savings as AWS offers the highest discount for upfront payments. Convertible Reserved Instances provide flexibility to change the instance type but usually at a slightly higher cost than Standard Reserved Instances. Compute Savings Plans offer cost savings, but in this scenario, the best optimization would be a combination of Standard Reserved Instances with All Upfront payment. Spot Instances are not suitable due to their interruptible nature. References:

AWS EC2 Reserved Instances

AWS Savings Plans

Amazon EC2 On-Demand Instances are ideal for unpredictable workloads that do not require a long-term commitment. This option allows users to pay for compute capacity by the hour or second, with no long-term commitments. It is suitable for short-term, spiky, or unpredictable workloads that cannot be interrupted and require flexibility. Option A is better suited for Reserved Instances, Option B is ideal for Spot Instances, and Option D is more suited for Reserved Instances due to cost optimization for long-term use.

'There is no long-term commitment required when you purchase On-Demand Instances. You pay only for the seconds that your On-Demand Instances are in the running state, with a 60-second minimum. The price per second for a running On-Demand Instance is fixed, and is listed on the Amazon EC2 Pricing, On-Demand Pricing page. We recommend that you use On-Demand Instances for applications with short-term, irregular workloads that cannot be interrupted.' https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-on-demand-instances.html

The ability to scale resources up and down based on application load is tied to the advantage of 'Stop guessing capacity.' This feature allows users to scale resources automatically to match the demand, thereby avoiding over-provisioning or under-provisioning of resources. 'Go global in minutes,' 'Benefit from massive economies of scale,' and 'Trade fixed expense for variable expense' are other advantages of cloud computing, but they do not specifically address scaling resources up and down based on load.

AWS Database Migration Service (DMS) and AWS Schema Conversion Tool are the primary services for migrating a commercial relational database to an Amazon-managed open-source database. AWS DMS helps migrate the data, while the AWS Schema Conversion Tool converts the database schema from the source database format to the target format, including SQL code. AWS SDKs are for software development, AWS Systems Manager is for operational management, and Amazon EMR is for big data processing, which are not relevant to this use case.

All Upfront Reserved Instances offer the most cost-effective solution for a workload that will run continuously for one year without interruption. By paying upfront, the user receives the maximum discount over the On-Demand pricing model. Partial Upfront Reserved Instances and Dedicated Instances are more expensive than All Upfront Reserved Instances. On-Demand Instances are not cost-effective for continuous long-term workloads due to their higher hourly rates.

AWS provides an Attestation of Compliance (AOC) report for specific AWS services to assist companies in achieving Payment Card Industry Data Security Standard (PCI DSS) compliance in the cloud. This report demonstrates that AWS services meet the necessary PCI DSS requirements. AWS does not offer physical inspections of data centers by appointment, nor does it provide certifications for any application running on AWS. Additionally, AWS does not provide professional PCI compliance services; companies must manage their PCI compliance in their environment.

The AWS Cloud Development Kit (AWS CDK) currently supports multiple programming languages, including Python and TypeScript. These languages allow developers to define cloud infrastructure using familiar programming constructs. Python and TypeScript are among the first languages supported by AWS CDK, which also supports Java, C#, and JavaScript. This enables developers to use their existing programming skills and tools to define cloud infrastructure in code.

B . Swift: Incorrect, as Swift is not currently supported by AWS CDK.

D . Ruby: Incorrect, as Ruby is not currently supported by AWS CDK.

E . PHP: Incorrect, as PHP is not currently supported by AWS CDK.

AWS Cloud References:

AWS Cloud Development Kit (AWS CDK)

By implementing AWS CloudTrail, a company is adhering to the AWS Cloud design principle of activating traceability. AWS CloudTrail provides detailed logs of all API calls made in an AWS account, which helps monitor, troubleshoot, and detect unusual activity, thereby improving security and compliance. This supports the principle of 'activating traceability' by enabling continuous monitoring and auditing of all actions and changes within the AWS environment.

B . Use serverless compute architectures: Incorrect, as this principle encourages the use of managed services that handle infrastructure, such as AWS Lambda, and is not directly related to CloudTrail.

C . Perform operations as code: Incorrect, as this principle emphasizes the use of code and automation for infrastructure management.

D . Go global in minutes: Incorrect, as this principle relates to the global deployment of applications and services.

AWS Cloud References:

AWS Well-Architected Framework

AWS CloudTrail

According to the AWS Shared Responsibility Model, AWS is responsible for protecting the infrastructure that runs all of the services offered in the AWS Cloud, including Amazon S3. This infrastructure includes hardware, software, networking, and facilities that run AWS services.

A . Configure an S3 Lifecycle policy: Incorrect, as configuring S3 Lifecycle policies to manage object lifecycle (e.g., transitioning objects to different storage classes or deleting them after a certain period) is the customer's responsibility.

B . Activate S3 Versioning: Incorrect, as enabling S3 Versioning is a customer responsibility for managing data protection.

C . Configure S3 bucket policies: Incorrect, as setting and managing S3 bucket policies to control access is the customer's responsibility.

AWS Cloud References:

AWS Shared Responsibility Model

Amazon S3