DVA-C02 EXAM DUMPS COLLECTION & TEST DVA-C02 TESTKING

DVA-C02 Exam Dumps Collection & Test DVA-C02 Testking

DVA-C02 Exam Dumps Collection & Test DVA-C02 Testking

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Amazon AWS Certified Developer - Associate Sample Questions (Q209-Q214):

NEW QUESTION # 209
A developer created an AWS Lambda function that performs a series of operations that involve multiple AWS services. The function's duration time is higher than normal. To determine the cause of the issue, the developer must investigate traffic between the services without changing the function code Which solution will meet these requirements?

  • A. Configure AWS CloudTrail View the trail logs that are associated with the Lambda function.
  • B. Review the AWS Config logs in Amazon Cloud Watch.
  • C. Enable AWS X-Ray active tracing in the Lambda function Review the logs in X-Ray
  • D. Review the Amazon CloudWatch logs that are associated with the Lambda function.

Answer: C

Explanation:
* Tracing Distributed Systems: AWS X-Ray is designed to trace requests across services, helping identify bottlenecks in distributed applications like this one.
* No Code Changes: Enabling X-Ray tracing often requires minimal code changes, meeting the requirement.
* Identifying Bottlenecks: Analyzing X-Ray traces and logs will reveal latency in communications between different AWS services, leading to the high duration time.


NEW QUESTION # 210
A developer is building an application that stores objects in an Amazon S3 bucket. The bucket does not have versioning enabled. The objects are accessed rarely after 1 week. However, the objects must be immediately available at all times. The developer wants to optimize storage costs for the S3 bucket.
Which solution will meet this requirement?

  • A. Create an S3 Lifecycle rule to transition objects to S3 Glacier Flexible Retrieval after 7 days.
  • B. Create an S3 Lifecycle rule to expire objects after 7 days.
  • C. Create an S3 Lifecycle rule to transition objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 7 days.
  • D. Create an S3 Lifecycle rule to delete objects that have delete markers.

Answer: C

Explanation:
Comprehensive Detailed and Lengthy Step-by-Step Explanation with All AWS Developer References:
1. Understanding the Use Case:
The goal is to store objects in an S3 bucket while optimizing storage costs. The key conditions are:
* Objects are accessed infrequently after 1 week.
* Objects must remain immediately accessible at all times.
2. AWS S3 Storage Classes Overview:
Amazon S3 offers various storage classes, each optimized for specific use cases:
* S3 Standard: Best for frequently accessed data with low latency and high throughput needs.
* S3 Standard-Infrequent Access (S3 Standard-IA): Optimized for infrequently accessed data but requires the same availability and immediate access as Standard storage. It provides lower storage costs but incurs retrieval charges.
* S3 Glacier Flexible Retrieval (formerly S3 Glacier): Designed for archival data with retrieval latency ranging from minutes to hours. This does not meet the requirement for "immediate access."
* S3 Glacier Deep Archive: Lowest-cost storage, suitable for rarely accessed data with retrieval times of hours.
3. Explanation of the Options:
* Option A:"Create an S3 Lifecycle rule to expire objects after 7 days."Expiring objects after 7 days deletes them permanently, which does not fulfill the requirement of retaining the objects for later infrequent access.
* Option B:"Create an S3 Lifecycle rule to transition objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 7 days."This is the correct solution. S3 Standard-IA is ideal for objects accessed infrequently but still need to be available immediately. Transitioning objects to this storage class reduces storage costs while maintaining availability and low latency.
* Option C:"Create an S3 Lifecycle rule to transition objects to S3 Glacier Flexible Retrieval after 7 days."S3 Glacier Flexible Retrieval is a low-cost archival solution. However, it does not provide immediate access as retrieval requires minutes to hours. This option does not meet the requirement.
* Option D:"Create an S3 Lifecycle rule to delete objects that have delete markers."This option is irrelevant to the given use case, as it addresses versioning cleanup, which is not enabled in the described S3 bucket.
4. Implementation Steps for Option B:
To transition objects to S3 Standard-IA after 7 days:
* Navigate to the S3 Console:
* Sign in to the AWS Management Console and open the S3 service.
* Select the Target Bucket:
* Choose the bucket where the objects are stored.
* Set Up a Lifecycle Rule:
* Go to the Management tab.
* Under Lifecycle Rules, click Create lifecycle rule.
* Define the Rule Name and Scope:
* Provide a descriptive name for the rule.
* Specify whether the rule applies to the entire bucket or a subset of objects (using a prefix or tag filter).
* Configure Transitions:
* Choose Add transition.
* Specify that objects should transition to S3 Standard-IA after 7 days.
* Review and Save the Rule:
* Review the rule configuration and click Save.
5. Cost Optimization Benefits:
Transitioning to S3 Standard-IA results in cost savings as it offers:
* Lower storage costs compared to S3 Standard.
* Immediate access to objects when required.However, remember that there is a retrieval cost associated with S3 Standard-IA, so it is best suited for data with low retrieval frequency.
References:
* Amazon S3 Lifecycle Configuration Guide
* Amazon S3 Storage Classes
* AWS S3 Pricing
* AWS Documentation on S3 Standard-IA


NEW QUESTION # 211
A developer is trying get data from an Amazon DynamoDB table called demoman-table. The developer configured the AWS CLI to use a specific IAM use's credentials and ran the following command.

The command returned errors and no rows were returned.
What is the MOST likely cause of these issues?

  • A. The command is incorrect; it should be rewritten to use put-item with a string argument
  • B. Amazon DynamoOB cannot be accessed from the AWS CLI and needs to called via the REST API
  • C. The IAM user needs an associated policy with read access to demoman-table
  • D. The developer needs to log a ticket with AWS Support to enable access to the demoman-table

Answer: C

Explanation:
This solution will most likely solve the issues because it will grant the IAM user the necessary permission to access the DynamoDB table using the AWS CLI command. The error message indicates that the IAM user does not have sufficient access rights to perform the scan operation on the table. Option A is not optimal because it will change the command to use put-item instead of scan, which will not achieve the desired result of getting data from the table. Option B is not optimal because it will involve contacting AWS Support, which may not be necessary or efficient for this issue. Option C is not optimal because it will state that DynamoDB cannot be accessed from the AWS CLI, which is incorrect as DynamoDB supports AWS CLI commands.


NEW QUESTION # 212
A company is running a custom application on a set of on-premises Linux servers that are accessed using Amazon API Gateway. AWS X-Ray tracing has been enabled on the API test stage.
How can a developer enable X-Ray tracing on the on-premises servers with the LEAST amount of configuration?

  • A. Capture incoming requests on-premises and configure an AWS Lambda function to pull, process, and relay relevant data to X-Ray using the PutTelemetryRecords API call.
  • B. Install and run the X-Ray SDK on the on-premises servers to capture and relay the data to the X-Ray service.
  • C. Capture incoming requests on-premises and configure an AWS Lambda function to pull, process, and relay relevant data to X-Ray using the PutTraceSegments API call.
  • D. Install and run the X-Ray daemon on the on-premises servers to capture and relay the data to the X-Ray service.

Answer: D

Explanation:
The X-Ray daemon is a software that collects trace data from the X-Ray SDK and relays it to the X-Ray service. The X-Ray daemon can run on any platform that supports Go, including Linux, Windows, and macOS. The developer can install and run the X-Ray daemon on the on-premises servers to capture and relay the data to the X-Ray service with minimal configuration. The X-Ray SDK is used to instrument the application code, not to capture and relay data. The Lambda function solutions are more complex and require additional configuration.
Reference:
[AWS X-Ray concepts - AWS X-Ray]
[Setting up AWS X-Ray - AWS X-Ray]


NEW QUESTION # 213
A company uses more than 100 AWS Lambda functions to handle application services. One Lambda function is critical and must always run successfully. The company notices that occasionally, the critical Lambda function does not initiate. The company investigates the issue and discovers instances of the Lambda TooManyRequestsException: Rate Exceeded error in Amazon CloudWatch logs. Upon further review of the logs, the company notices that some of the non-critical functions run properly while the critical function fails. A developer must resolve the errors and ensure that the critical Lambda function runs successfully. Which solution will meet these requirements with the LEAST operational overhead?

  • A. Configure CloudWatch alarms for TooManyRequestsException errors. Add the critical Lambda function as an alarm state change action to invoke the critical function again after a failure.
  • B. Configure reserved concurrency for the critical Lambda function. Set reserved concurrent executions to the appropriate level.
  • C. Configure CloudWatch alarms for TooManyRequestsException errors. Add Amazon EventBridge as an action for the alarm state change. Use EventBridge to invoke the critical function again after a failure.
  • D. Configure provisioned concurrency for the critical Lambda function. Set provisioned concurrent executions to the appropriate level.

Answer: B

Explanation:
Reserved concurrency guarantees a specific number of concurrent executions for a critical Lambdafunction.
This ensures that the critical function always has sufficient resources to execute, even if other functions are consuming concurrency.
Why Option A:
* Ensures Function Availability: Reserved concurrency isolates the critical Lambda function from other functions.
* Low Overhead: Configuring reserved concurrency is straightforward and requires minimal setup.
Why Not Other Options:
* Option B: Provisioned concurrency is ideal for reducing cold starts, not for managing execution limits.
* Option C & D: Alarms and re-invocation mechanisms add complexity without resolving the root cause.


NEW QUESTION # 214
......

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