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| Certification Vendor: | Amazon Web Services (AWS) |
|---|---|
| Exam Name: | AWS Certified Developer - Associate |
| Exam Number: | DVA-C02 |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 130 minutes |
| Passing Score: | 720 (scaled score of 100โ1,000) |
| Exam Price: | 150 USD |
| Available Languages: | English, Korean, Spanish (Latin America), Simplified Chinese, Portuguese (Brazil), Japanese |
| Related Certifications: | AWS Certified Cloud Practitioner AWS Certified DevOps Engineer - Professional |
| Exam Format: | Multiple response, Multiple choice |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Sample Questions: | Amazon DVA-C02 Sample Questions |
| Exam Way: | Pearson VUE testing center or online proctored exam |
| Pre Condition: | Recommended 1 or more years of hands-on experience in developing and maintaining applications using AWS services. Proficiency in at least one high-level programming language. |
| Official Syllabus URL: | https://aws.amazon.com/certification/certified-developer-associate/ |
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Amazon DVA-C02 exam covers a range of topics related to AWS development, including AWS core services, security and compliance, development and deployment, and troubleshooting. Candidates must have a good understanding of AWS services such as EC2, S3, DynamoDB, and Elastic Beanstalk, as well as knowledge of programming languages such as Java, Python, and Node.js. Passing this certification exam demonstrates that the individual has the necessary skills to design and develop scalable, secure, and fault-tolerant applications on the AWS cloud platform.
Amazon DVA-C02 (AWS Certified Developer โ Associate) exam is a certification exam designed for individuals who want to demonstrate their expertise in developing and deploying applications on the Amazon Web Services (AWS) platform. AWS Certified Developer - Associate certification is ideal for developers who have experience in programming languages such as Python, Java, and Ruby, and are looking to build, deploy, and manage applications using AWS services.
NEW QUESTION # 641
A developer maintains an Amazon API Gateway REST API. Customers use the API through a frontend UI and Amazon Cognito authentication.
The developer has a new version of the API that contains new endpoints and backward-incompatible interface changes. The developer needs to provide beta access to other developers on the team without affecting customers.
Which solution will meet these requirements with the LEAST operational overhead?
Answer: C
Explanation:
Amazon API Gateway is a service that enables developers to create, publish, maintain, monitor, and secure APIs at any scale. The developer can define a development stage on the API Gateway API and instruct the other developers to point the endpoints to the development stage. This way, the developer can provide beta access to the new version of the API without affecting customers who use the production stage. This solution will meet the requirements with the least operational overhead.
NEW QUESTION # 642
A financial services company builds a credit card transaction processing application that uses an Amazon API Gateway HTTP API and AWS Lambda functions. The application logs all requests and request parameters to Amazon CloudWatch. The application makes the logs accessible to developer AWS accounts and a separate fraud detection AWS account by using a cross-account IAM role.
The company requires that only the fraud detection account be able to view customer credit card numbers that are associated with the transactions. Developers at the company must not be able to use the credit card numbers for testing or debugging.
The developers create the following data protection policy document snippet:
{
"Name": "data-protection-policy",
"Description": "Credit card redaction",
"Version": "2021-06-01",
"Statement": [{
"Sid": "redact-policy",
"DataIdentifier": [
"arn:aws:dataprotection::aws:data-identifier/CreditCardNumber"
],
"Operation": {
"Deidentify": {
"MaskConfig": {}
}
}
}]
}
Which combination of actions must the developers take to comply with the new policy? (Select TWO.)
Answer: D,E
Explanation:
To meet the requirement that developers cannot view credit card numbers while the fraud detection account can, the solution must (1) ensure the sensitive data is masked at ingestion/storage in CloudWatch Logs, and (2) allow only an authorized principal to view unmasked values.
First, the developers must attach the data protection policy to the CloudWatch log group that receives the API Gateway HTTP API access logs (and/or the Lambda log group if credit card numbers can appear there).
A CloudWatch Logs data protection policy is applied at the log group level and instructs CloudWatch Logs to identify sensitive data using managed data identifiers (for example, CreditCardNumber) and then apply the configured de-identification action (here, masking). Without attaching the policy to the log group, the masking/redaction behavior will not be enforced for newly ingested log events, and developers could still see raw request parameters.
Second, to permit only the fraud detection account to reveal the masked values when necessary, the IAM role that the fraud detection account assumes must have the specific CloudWatch Logs permission to unmask protected data. Granting logs:Unmask to that role enables authorized access to view the sensitive values while keeping them masked for everyone else who lacks that permission (such as developer accounts assuming other roles).
Options A and E are not required for CloudWatch Logs data protection enforcement; the core controls are log- group policy attachment (to perform masking) and IAM authorization (to permit unmasking only for the fraud role). Therefore, the correct combination is C (apply the policy to the log group that captures the HTTP API logs) and B (grant logs:Unmask to the fraud detection role).
NEW QUESTION # 643
A developer is writing a serverless application that requires an AWS Lambda function to be invoked every 10 minutes.
What is an automated and serverless way to invoke the function?
Answer: A
Explanation:
Explanation
The solution that will meet the requirements is to create an Amazon EventBridge rule that runs on a regular schedule to invoke the Lambda function. This way, the developer can use an automated and serverless way to invoke the function every 10 minutes. The developer can also use a cron expression or a rate expression to specify the schedule for the rule. The other options either involve using an Amazon EC2 instance, which is not serverless, or using environment variables or query parameters, which do not trigger the function.
NEW QUESTION # 644
Users of a web-based music application are experiencing latency issues on one of the application ' s most popular pages. A developer identifies that the issue is caused by the slow load time of specific widgets that rank and sort various songs and albums.
The developer needs to ensure that the widgets load more quickly by using built-in, in-memory ranking and sorting techniques. The developer must ensure that the data remains up to date.
Which solution will meet these requirements with the LEAST latency ?
Answer: C
Explanation:
Comprehensive and Detailed 250 to 300 words of Explanation (AWS-doc-aligned):
To minimize widget latency for ranking and sorting, the best fit is Amazon ElastiCache for Redis OSS because Redis provides built-in in-memory data structures specifically suited for ranking use cases, such as Sorted Sets (ZSETs) . Sorted sets maintain members in order by score, which enables fast retrieval of "top N" items and efficient re-ranking without repeatedly querying the primary database and sorting at the application tier. Memcached, by contrast, is a simpler key-value cache and does not provide comparable native ranking/sorting data structures.
To ensure data remains up to date , a write-through caching strategy is preferred. With write-through, updates are written to the cache at the same time as the system of record, so the cache reflects the latest values immediately after writes. This avoids stale rankings that can occur with lazy-loading (cache-aside), where the cache is only populated or refreshed on reads and can serve older data until expiration or explicit invalidation.
Combining Redis's native sorted/ranking structures with write-through updates yields the least latency because the page widgets can fetch pre-ranked/pre-sorted results directly from Redis memory with minimal computation, while still maintaining freshness as new plays, likes, or album changes occur. Operationally, this pattern reduces database load, avoids repeated sorting work in the application, and provides consistently fast reads for a high-traffic page.
NEW QUESTION # 645
A developer is deploying an application on Amazon EC2 instances that run in Account A. In certain cases, this application needs to read data from a private Amazon S3 bucket in Account B. The developer must provide the application access to the S3 bucket without exposing the S3 bucket to anyone else.
Which combination of actions should the developer take to meet these requirements? (Select TWO.)
Answer: B,D
Explanation:
This is a classic cross-account S3 access requirement: EC2 instances in Account A must read from a private S3 bucket in Account B without making the bucket public.
The correct pattern is to grant access using IAM + S3 bucket policy while keeping the bucket private. In Account B, you create an IAM role that has the necessary S3 read permissions (such as s3:GetObject and potentially s3:ListBucket depending on access needs). That is Option A.
However, permissions on the role alone are not sufficient, because the S3 bucket is in a different account and is private by default. AWS requires that the bucket owner explicitly grants access to the external principal.
This is done by adding a bucket policy in Account B that allows the principal (either the role in Account A or a role session via STS) to access the bucket objects. That is Option D.
Option B is not correct in the "select two" sense because adding permissions to Account A's instance profile role does not, by itself, grant access to a bucket owned by Account B. You still need the bucket policy or another resource-based policy from the bucket owner.
Option C violates the requirement ("without exposing the S3 bucket to anyone else"). Making the bucket public is unnecessary and insecure.
Option E is incorrect because a trust policy controls who can assume a role (sts:AssumeRole), not what S3 permissions the role has. Also, trust policies do not grant s3:Get* access.
Therefore, create an IAM role with S3 read permissions in Account B and grant access via the Account B bucket policy.
NEW QUESTION # 646
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