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| Certification Vendor: | Amazon AWS |
|---|---|
| Exam Name: | AWS Certified Developer - Associate |
| Exam Number: | DVA-C02 |
| Related Certifications: | AWS Certified Solutions Architect - Associate AWS Certified SysOps Administrator - Associate |
| Certificate Validity Period: | 3 years |
| Passing Score: | 720 (scaled score 100โ1000) |
| Exam Price: | 150 USD |
| Exam Format: | Multiple-choice, Multiple-response |
| Available Languages: | Spanish (Latin America), Simplified Chinese, Portuguese (Brazil), Korean, Japanese, English |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Exam Duration: | 130 minutes |
| Recommended Training: | AWS Certified Developer - Associate Exam Prep AWS Skill Builder |
| Exam Registration: | Pearson VUE Registration AWS Certification Registration |
| Sample Questions: | Amazon DVA-C02 Sample Questions |
| Exam Way: | Online proctored or onsite at Pearson VUE testing centers |
| Pre Condition: | Recommended: 1+ year of hands-on experience developing applications on AWS, familiarity with AWS core services, basic understanding of cloud architecture |
| Official Syllabus URL: | https://docs.aws.amazon.com/aws-certification/latest/developer-associate-02/developer-associate-02.html |
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Amazon DVA-C02 Exam is a valuable certification for developers who want to demonstrate their skills and knowledge in developing and maintaining AWS-based applications. DVA-C02 exam validates their understanding of AWS core services, databases, security, deployment, and troubleshooting. AWS Certified Developer - Associate certification is also a valuable credential for advancing their career in the cloud computing industry.
NEW QUESTION # 395
A developer wants the ability to roll back to a previous version of an AWS Lambda function in the event of errors caused by a new deployment.
How can the developer achieve this with MINIMAL impact on users?
Answer: C
NEW QUESTION # 396
A company has installed smart motes in all Its customer locations. The smart meter's measure power usage at
1minute intervals and send the usage readings to a remote endpoint tot collection. The company needs to create an endpoint that will receive the smart meter readings and store the readings in a database. The company wants to store the location ID and timestamp information.
The company wants to give Is customers low-latency access to their current usage and historical usage on demand The company expects demand to increase significantly. The solution must not impact performance or include downtime write seeing.
When solution will meet these requirements MOST cost-effectively?
Answer: B
Explanation:
The solution that will meet the requirements most cost-effectively is to store the smart meter readings in an Amazon DynamoDB table. Create a composite key by using the location ID and timestamp columns. Use the columns to filter on the customers' data. This way, the company can leverage the scalability, performance, and low latency of DynamoDB to store and retrieve the smart meter readings. The company can also use the composite key to query the data by location ID and timestamp efficiently. The other options either involve more expensive or less scalable services, or do not provide low-latency access to the current usage.
NEW QUESTION # 397
A developer is designing a new feature for an existing application that uses an AWS Lambda function. The developer wants to test the Lambda function safely in development and testing AWS accounts before deploying the function to a production AWS account. The developer must be able to roll back the function if issues are discovered.
Which solution will meet these requirements with the LEAST operational overhead?
Answer: A
Explanation:
AWS Lambda versions and aliases are designed specifically to support safe deployments, testing, and rollback. A Lambda version is immutable, meaning its code and configuration cannot change once published.
Aliases act as pointers to specific versions and can be updated instantly.
AWS documentation recommends using aliases to manage environments such as dev, test, and prod. Each environment can reference a specific Lambda version, allowing the same function codebase to be promoted across accounts with confidence. If a defect is detected in production, the alias can be quickly repointed to a previously known good version, enabling an immediate rollback without redeployment.
Options B, C, and D introduce higher operational overhead or do not provide safe rollback. Deploying separately increases risk and management effort. Lambda layers are not intended for environment promotion.
Environment variables do not protect against faulty code deployments.
Therefore, using Lambda versions and aliases is the most efficient and AWS-recommended solution.
NEW QUESTION # 398
A company is building a serverless application on AWS. The application uses an AWS Lambda function to process customer orders 24 hours a day, 7 days a week. The Lambda function calls an external vendor's HTTP API to process payments.
During load tests, a developer discovers that the external vendor payment processing API occasionally times out and returns errors. The company expects that some payment processing API calls will return errors.
The company wants the support team to receive notifications in near real time only when the payment processing external API error rate exceed 5% of the total number of transactions in an hour. Developers need to use an existing Amazon Simple Notification Service (Amazon SNS) topic that is configured to notify the support team.
Which solution will meet these requirements?
Answer: B
Explanation:
Amazon CloudWatch is a service that monitors AWS resources and applications. The developer can publish custom metrics to CloudWatch that record the failures of the external payment processing API calls. The developer can configure a CloudWatch alarm to notify the existing SNS topic when the error rate exceeds 5% of the total number of transactions in an hour. This solution will meet the requirements in a near real-time and scalable way.
Reference:
[What Is Amazon CloudWatch? - Amazon CloudWatch]
[Publishing Custom Metrics - Amazon CloudWatch]
[Creating Amazon CloudWatch Alarms - Amazon CloudWatch]
NEW QUESTION # 399
An AWS Lambda function requires read access to an Amazon S3 bucket and requires read/write access to an Amazon DynamoDB table. The correct IAM policy already exists.
What is the MOST secure way to grant the Lambda function access to the S3 bucket and the DynamoDB table?
Answer: C
Explanation:
The most secure and AWS-recommended way for a Lambda function to access other AWS services is to use an IAM execution role. Lambda assumes this role at runtime and receives temporary credentials that are automatically rotated by AWS. The developer attaches the necessary permissions (the existing IAM policy) to that role, and then configures the Lambda function to use the role.
Option B follows least privilege and avoids long-term credentials. It also integrates with AWS security tooling: IAM Access Analyzer, CloudTrail, and policy boundaries can all be applied cleanly. Because the policy already exists, this requires minimal extra work: create/choose the execution role, attach the policy, and assign the role to the function.
Option A is not correct because IAM policies are attached to IAM identities (users, groups, roles) - not directly to Lambda functions as standalone entities. Lambda permissions are granted through the function's execution role.
Option C is insecure because it uses long-term IAM user access keys embedded in environment variables.
Even if encrypted, this expands the blast radius, complicates rotation, and contradicts AWS best practices for avoiding static credentials inside code/runtime.
Option D is extremely insecure and noncompliant. Root user access keys should not be used for applications and should generally not exist.
Therefore, create and attach the existing policy to a Lambda execution IAM role and assign that role to the function.
NEW QUESTION # 400
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