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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting and Optimization | 18% | - Debug and resolve errors
|
| Development with AWS Services | 32% | - Write code for applications hosted on AWS
|
| Deployment | 24% | - Deploy applications on AWS
|
| Security | 26% | - Apply security best practices
|
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NEW QUESTION # 301
A developer deployed an application to an Amazon EC2 instance The application needs to know the public IPv4 address of the instance How can the application find this information?
Answer: B
Explanation:
Instance Metadata Service: EC2 instances have access to an internal metadata service. It provides instance- specific information like instance ID, security groups, and public IP address.
Accessing Metadata:
Make
an HTTP GET request to the base URL: http://169.254.169.254/latest/meta-data/ You'll get a list of available categories. The public IPv4 address is under public-ipv4.
References:
Instance Metadata and User Data: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data- retrieval.html
NEW QUESTION # 302
A company uses AWS CodePipeline to create a fully automated continuous integration and continuous delivery (CI/CD) workflow. Any code changes that the company commits to production will be automatically deployed to the company's Amazon EC2 instances. The company's leadership team must manually validate any changes before the company releases changes to production. Which solution will meet these requirements in the MOST operationally efficient way?
Answer: D
Explanation:
A manual approval action is a built-in CodePipeline feature designed specifically to pause a pipeline at a defined point and require a human to approve before continuing. Placing this action before the production deploy stage satisfies the requirement for leadership validation with minimal additional configuration and operational overhead.
NEW QUESTION # 303
A developer deployed an application to an Amazon EC2 instance The application needs to know the public IPv4 address of the instance How can the application find this information?
Answer: B
Explanation:
Instance Metadata Service: EC2 instances have access to an internal metadata service. It provides instance-specific information like instance ID, security groups, and public IP address.
Accessing Metadata:
Make an HTTP GET request to the base URL: http://169.254.169.254/latest/meta-data/ You'll get a list of available categories. The public IPv4 address is under public-ipv4.
Reference:
Instance Metadata and User Data: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-retrieval.html
NEW QUESTION # 304
A company runs an application on AWS. The application uses an AWS Lambda function that is configured with an Amazon Simple Queue Service (Amazon SQS) queue called high priority queue as the event source. A developer is updating the Lambda function with another SQS queue called low priority queue as the event source. The Lambda function must always read up to 10 simultaneous messages from the high priority queue before processing messages from low priority queue. The Lambda function must be limited to 100 simultaneous invocations.
Which solution will meet these requirements?
Answer: A
NEW QUESTION # 305
A developer at a company needs to create a small application that makes the same API call once each day at a designated time. The company does not have infrastructure in the AWS Cloud yet, but the company wants to implement this functionality on AWS.
Which solution meets these requirements in the MOST operationally efficient manner?
Answer: D
Explanation:
The correct answer is C) Use an AWS Lambda function that is invoked by an Amazon EventBridge scheduled event.
C) Use an AWS Lambda function that is invoked by an Amazon EventBridge scheduled event. This is correct. AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers. Lambda runs your code on a high-availability compute infrastructure and performs all of the administration of the compute resources, including server and operating system maintenance, capacity provisioning and automatic scaling, and logging1. Amazon EventBridge is a serverless event bus service that enables you to connect your applications with data from a variety of sources2. EventBridge can create rules that run on a schedule, either at regular intervals or at specific times and dates, and invoke targets such as Lambda functions3. This solution meets the requirements of creating a small application that makes the same API call once each day at a designated time, without requiring any infrastructure in the AWS Cloud or any operational overhead.
A) Use a Kubernetes cron job that runs on Amazon Elastic Kubernetes Service (Amazon EKS). This is incorrect. Amazon EKS is a fully managed Kubernetes service that allows you to run containerized applications on AWS4. Kubernetes cron jobs are tasks that run periodically on a given schedule5. This solution could meet the functional requirements of creating a small application that makes the same API call once each day at a designated time, but it would not be the most operationally efficient manner. The company would need to provision and manage an EKS cluster, which would incur additional costs and complexity.
B) Use an Amazon Linux crontab scheduled job that runs on Amazon EC2. This is incorrect. Amazon EC2 is a web service that provides secure, resizable compute capacity in the cloud6. Crontab is a Linux utility that allows you to schedule commands or scripts to run automatically at a specified time or date7. This solution could meet the functional requirements of creating a small application that makes the same API call once each day at a designated time, but it would not be the most operationally efficient manner. The company would need to provision and manage an EC2 instance, which would incur additional costs and complexity.
D) Use an AWS Batch job that is submitted to an AWS Batch job queue. This is incorrect. AWS Batch enables you to run batch computing workloads on the AWS Cloud8. Batch jobs are units of work that can be submitted to job queues, where they are executed in parallel or sequentially on compute environments9. This solution could meet the functional requirements of creating a small application that makes the same API call once each day at a designated time, but it would not be the most operationally efficient manner. The company would need to configure and manage an AWS Batch environment, which would incur additional costs and complexity.
Reference:
1: What is AWS Lambda? - AWS Lambda
2: What is Amazon EventBridge? - Amazon EventBridge
3: Creating an Amazon EventBridge rule that runs on a schedule - Amazon EventBridge
4: What is Amazon EKS? - Amazon EKS
5: CronJob - Kubernetes
6: What is Amazon EC2? - Amazon EC2
7: Crontab in Linux with 20 Useful Examples to Schedule Jobs - Tecmint
8: What is AWS Batch? - AWS Batch
9: Jobs - AWS Batch
NEW QUESTION # 306
......
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