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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Security | 26% | - Secure application data
|
| Topic 2: Troubleshooting and Optimization | 18% | - Debug and resolve errors
|
| Topic 3: Deployment | 24% | - Implement CI/CD pipelines
|
| Topic 4: Development with AWS Services | 32% | - Interact with AWS data services
|
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NEW QUESTION # 204
A company has deployed an application on AWS Elastic Beanstalk. The company has configured the Auto Scaling group that is associated with the Elastic Beanstalk environment to have five Amazon EC2 instances.
If the capacity is fewer than four EC2instances during the deployment, application performance degrades. The company is using the all-at-once deployment policy.
What is the MOST cost-effective way to solve the deployment issue?
Answer: B
Explanation:
This solution will solve the deployment issue by deploying the new version of the application to one new EC2 instance at a time, while keeping the old version running on the existing instances. This way, there will always be at least four instances serving traffic during the deployment, and no downtime or performance degradation will occur. Option A is not optimal because it will increase the cost of running the Elastic Beanstalk environment without solving the deployment issue. Option B is not optimal because it will split the traffic between two versions of the application, which may cause inconsistency and confusion for the customers. Option D is not optimal because it will deploy the new version of the application to two existing instances at a time, which may reduce the capacity below four instances during the deployment.
NEW QUESTION # 205
An application is processing clickstream data using Amazon Kinesis. The clickstream data feed into Kinesis experiences periodic spikes. The PutRecords API call occasionally fails and the logs show that the failed call returns the response shown below:
Which techniques will help mitigate this exception? (Choose two.)
Answer: A,D
Explanation:
The response from the API call indicates that the ProvisionedThroughputExceededException exception has occurred. This exception means that the rate of incoming requests exceeds the throughput limit for one or more shards in a stream. To mitigate this exception, the developer can use one or more of the following techniques:
* Implement retries with exponential backoff. This will introduce randomness in the retry intervals and avoid overwhelming the shards with retries.
* Reduce the frequency and/or size of the requests. This will reduce the load on the shards and avoid throttling errors.
* Increase the number of shards in the stream. This will increase the throughput capacity of the stream and accommodate higher request rates.
* Use a PutRecord API instead of PutRecords. This will reduce the number of records per request and avoid exceeding the payload limit.
References:
* [ProvisionedThroughputExceededException - Amazon Kinesis Data Streams Service API Reference]
* [Best Practices for Handling Kinesis Data Streams Errors]
NEW QUESTION # 206
A developer is designing a mobile app for an ecommerce company. The app gives users the ability to place orders. The developer configures the app to store data in an Amazon DynamoDB table named Orders.
The app must validate orders and process payments. The app must minimize latency between services and minimize dependencies between functions. Each process must scale independently.
Which solution will meet these requirements?
Answer: D
Explanation:
Using API Gateway to receive orders and EventBridge to route events asynchronously to independent Lambda functions allows each process (validation, payment, inventory) to scale separately, reduces dependencies, and minimizes latency via event-driven architecture.
NEW QUESTION # 207
An ecommerce application is running behind an Application Load Balancer. A developer observes some unexpected load on the application during non-peak hours. The developer wants to analyze patterns for the client IP addresses that use the application. Which HTTP header should the developer use for this analysis?
Answer: A
Explanation:
Explanation
The HTTP header that the developer should use for this analysis is the X-Forwarded-For header. This header contains the IP address of the client that made the request to the Application Load Balancer. The developer can use this header to analyze patterns for the client IP addresses that use the application. The other headers either contain information about the protocol, host, or port of the request, which are not relevant for the analysis.
NEW QUESTION # 208
A developer is troubleshooting an application that uses Amazon DynamoDB in the us-west-2 Region. The application is deployed to an Amazon EC2 instance. The application requires read- only permissions to a table that is named Cars. The EC2 instance has an attached IAM role that contains the following IAM policy:
When the application tries to read from the Cars table, an Access Denied error occurs.
How can the developer resolve this error?
Answer: D
Explanation:
https://aws.amazon.com/blogs/security/how-to-use-trust-policies-with-iam-roles/
NEW QUESTION # 209
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