Free Amazon Web Services CLF-C02 Practice Exam with Questions & Answers | Set: 2

Amazon EventBridge (formerly CloudWatch Events) allows users to respond to changes in the state of AWS resources. It can be configured to invoke an AWS Lambda function when an EC2 instance enters the “stopping” state, providing a serverless way to automate responses to changes in EC2 instance states. AWS Config, SNS, and CloudFormation do not provide direct triggering for specific instance state changes.

AWS CloudFormation allows developers to create, manage, and deploy AWS resources using templates, ensuring a standardized and repeatable infrastructure setup. It’s ideal for setting up development, test, and production environments consistently. AWS Cloud Map, CloudFront, and CloudTrail do not provide templated infrastructure management capabilities.

One of the main advantages of cloud computing is the ability to trade fixed capital expenditures for variable operating expenses. By moving to the AWS Cloud, the company pays only for the resources it uses on a per-usage basis, reducing the need for large upfront investments in data center infrastructure. This benefit allows for more flexible and cost-effective spending based on actual usage. Other options, such as increased speed and agility or global reach, are also cloud benefits but do not specifically address the shift from fixed to variable expenses.

AWS Identity and Access Management (IAM) is a web service that helps you securely control access to AWS resources for your users. You use IAM to control who can use your AWS resources (authentication) and what resources they can use and in what ways (authorization). IAM is always available free of charge to users4.

The set of tasks that would meet the requirement of having higher availability for a MySQL database running on a single Amazon EC2 instance is to migrate to Amazon RDS and enable Multi-AZ. Amazon RDS is a fully managed relational database service that supports MySQL and other popular database engines. By enabling Multi-AZ, users can have a primary database in one Availability Zone and a synchronous standby replica in another Availability Zone. In case of a planned or unplanned outage of the primary database, Amazon RDS automatically fails over to the standby replica with minimal disruption3. Adding an Application Load Balancer in front of the EC2 instance, configuring EC2 Auto Recovery to move the instance to another Availability Zone, or enabling termination protection for the EC2 instance would not provide higher availability for the database, as they do not address the single point of failure or data replication issues.

Amazon Athena Overview:

Amazon Athena is a serverless query service that allows users to analyze data in S3 using standard SQL.

It is commonly used to query AWS Cost and Usage Reports stored in S3.

How It Works for Cost Reports:

Cost and Usage Reports are delivered in a structured format to an S3 bucket.

Athena can query these reports without requiring additional ETL processes.

Why Other Options Are Incorrect:

A. Amazon OpenSearch Service:Designed for search and log analytics, not querying structured data.

C. Amazon Aurora:A relational database service, unsuitable for querying S3 data directly.

D. AWS Glue:Used for ETL tasks but not directly for querying.

Savings Plans offer cost savings for predictable, steady workloads over a one or three-year term, with flexibility in instance family and size, making them suitable for critical workloads on EC2 instances that will run for a long term like three years. Spot Instances are more cost-effective but not suitable forcritical, predictable workloads due to potential interruptions. Dedicated Hosts and On-Demand Instances would be more costly.

The reliability pillar of the AWS Well-Architected Framework includes the principle of testing recovery procedures to ensure systems can effectively recover from failures. Regular testing of recovery processes helps verify that systems are resilient and can handle potential disruptions. The other options align with different pillars like cost optimization and operational excellence.

AWS Shared Responsibility Model Overview:

AWS manages securityofthe cloud, including physical infrastructure and foundational services.

Customers are responsible for securityinthe cloud, which includes operating system configuration, data encryption, and application patch management.

Why Patch Management Is Shared:

AWS is responsible for patching the underlying infrastructure.

Customers are responsible for patching the operating system and applications they install on their resources (e.g., EC2 instances).

Why Other Options Are Incorrect:

A. Configuration of Amazon EC2 instance operating systems:Fully the customer’s responsibility.

B. Application file system server-side encryption:Customers configure and manage encryption.

D. Security of the physical infrastructure:Fully AWS’s responsibility.

Understanding S3 Intelligent-Tiering: S3 Intelligent-Tiering is designed to optimize costs by automatically moving data to the most cost-effective access tier based on changing access patterns. It is ideal for data with unknown or unpredictable access patterns.

Why S3 Intelligent-Tiering is Cost-Effective:

Automatic Tiering: Moves data between two access tiers (frequent and infrequent access) based on changing access patterns, optimizing storage costs without performance impact.

No Retrieval Fees: Unlike other storage classes, there are no retrieval fees in Intelligent-Tiering, making it cost-effective for data with unpredictable access patterns.

Monitoring and Automation: Automatically monitors access patterns and transitions data, reducing the need for manual intervention.

When to Use S3 Intelligent-Tiering:

Unpredictable Access Patterns: Ideal for datasets where the access frequency cannot be determined or changes frequently.

Cost Optimization: For organizations looking to minimize storage costs without sacrificing performance or requiring manual intervention to move data between tiers.

Amazon S3 Intelligent-Tiering

Amazon S3 Storage Classes

AWS Marketplace is a digital catalog that offers third-party software, including security solutions like intrusion detection systems, which can be deployed directly within an AWS environment. By using AWS Marketplace, companies can find, purchase, and deploy ISP intrusion detection systems or other security tools that meet their specific requirements. Other services, such as AWS Security Hub and Quick Starts, do not directly provide third-party application deployment.

Elastic Load Balancing (ELB) distributes incoming traffic across multiple targets, such as EC2 instances, containers, and IP addresses, ensuring better application availability and fault tolerance. While ELB scales to meet traffic demands, it does not inherently scale compute resources themselves, span multiple regions, or balance traffic between internet gateways.

The reliability pillar of the AWS Well-Architected Framework emphasizes building systems that can recover from failures and dynamically adjust to meet demand. This includes designing to automatically recover from failures and implementing mechanisms to manage capacity demands, avoiding manual guesswork. The other options do not align with core reliability principles, as operating in a single Availability Zone or preemptively adjusting quotas in a secondary region does not inherently improve reliability.