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| Certification Vendor: | Amazon AWS |
|---|---|
| Exam Name: | AWS Certified Developer - Associate |
| Exam Number: | DVA-C02 |
| Exam Duration: | 130 minutes |
| Available Languages: | Japanese, Korean, English, Spanish (Latin America), Simplified Chinese, Portuguese (Brazil) |
| Certificate Validity Period: | 3 years |
| Related Certifications: | AWS Certified SysOps Administrator - Associate AWS Certified Solutions Architect - Associate |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Exam Price: | 150 USD |
| Passing Score: | 720 (scaled score 100–1000) |
| Exam Format: | Multiple-response, Multiple-choice |
| Recommended Training: | AWS Certified Developer - Associate Exam Prep AWS Skill Builder |
| Exam Registration: | AWS Certification Registration Pearson VUE 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 Certification Exam is designed for individuals who want to become an AWS Certified Developer - Associate. AWS Certified Developer - Associate certification is considered one of the most in-demand certifications in the cloud computing industry due to the increasing demand for AWS developers. AWS Certified Developer - Associate certification exam tests the candidate's skills in developing and maintaining applications on the AWS platform.
NEW QUESTION # 789
A stock trading company is developing a mobile app that provides near real-time market data and historical trading analytics to thousands of professional traders who make trades concurrently. The app needs to provide market data to traders in under 100 milliseconds. Historical analytics charts can take 2- 3 seconds to generate.
The app needs to be highly available and handle market events that cause sudden spikes in trading activity.
Some trades involve messages that are over 1 MB in size.
The company must provide equal market access to all traders. The company must ensure that all traders experience the same performance when they use the app.
Which solution will meet these requirements?
Answer: D
Explanation:
The correct answer is A because the workload needs shared, low-latency, highly available caching for all traders. ElastiCache Redis OSS in cluster mode distributes data across shards and supports read replicas, which improves read scalability and protects against node failure. Write-through caching keeps near real-time market data consistent in the cache as updates occur, giving all traders access to the same fresh data path instead of relying on device-local caches. Lazy loading with TTL is appropriate for historical analytics because those results can tolerate a few seconds of generation time and can be cached after first access. DynamoDB with DAX is weaker here because DynamoDB items have a 400 KB maximum size, while the scenario includes messages over 1 MB. Single-node Redis is not highly available.
NEW QUESTION # 790
A developer is trying to make API calls using the AWS SDK. The IAM user credentials used by the application require multi-factor authentication for all API calls.
Which method should the developer use to access the multi-factor authentication-protected API?
Answer: A
Explanation:
When IAM user credentials require MFA for API access, the correct approach is to obtain temporary security credentials from AWS Security Token Service (STS) that are validated with an MFA code. AWS documentation describes using STS to issue temporary credentials that applications can use instead of long- term access keys, especially when MFA is required.
The specific STS API operation used for an IAM user to obtain temporary credentials is GetSessionToken.
This call supports MFA by accepting the user's MFA device serial number and a time-based one-time password (TOTP) code. STS then returns a set of temporary credentials: AccessKeyId, SecretAccessKey, and SessionToken, which the SDK can use to sign subsequent API requests. This is the standard method for enabling MFA-protected API access for IAM users.
Why the other options are wrong:
* GetFederationToken is used to obtain temporary credentials for a federated user, often for scenarios where you want to grant access to resources for users who do not have IAM users. It's not the typical method for IAM-user MFA enforcement for all calls.
* GetCallerIdentity simply returns identity details for the current credentials; it does not generate credentials.
* DecodeAuthorizationMessage is used to decode encoded authorization failure messages returned by AWS, not to authenticate.
Therefore, to access an API protected by MFA requirements for an IAM user, the developer should call GetSessionToken and then use the returned temporary credentials in the AWS SDK.
NEW QUESTION # 791
A company has an online order website that uses Amazon DynamoDB to store item inventory. A sample of the inventory object is as follows:
A developer needs to reduce all inventory prices by 100 as long as the resulting price would not be less than 500.
What should the developer do to make this change with the LEAST number of calls to DynamoDB?
Answer: A
Explanation:
To update the Price while ensuring it does not go below 500, the developer should perform a single UpdateItem operation with a ConditionExpression like Price >= 600. This ensures the update is performed only if the price remains ≥ 500 after subtracting 100, minimizing the number of calls by avoiding a prior read.
NEW QUESTION # 792
A company has built an AWS Lambda function to convert large image files into output files that can be used in a third-party viewer application. The company recently added a new module to the function to improve the output of the generated files. However, the new module has increased the bundle size and has increased the time that is needed to deploy changes to the function code.
How can a developer increase the speed of the Lambda function deployment?
Answer: C
NEW QUESTION # 793
A developer stores user data in an Amazon S3 bucket for an application. The user data must always be readily available.
The application accesses new user data frequently. The application rarely queries data that is more than 3 months old. However, the application queries some important user data consistently.
Both frequently accessed data and infrequently accessed data are stored separately within the S3 bucket. The developer has replicated the bucket to a second Region as part of a disaster recovery plan.
The developer wants to optimize storage costs for the user data based on usage patterns.
What combination of steps will meet these requirements? (Choose two.)
Answer: A,E
Explanation:
You can use an S3 Lifecycle rule that targets only the infrequently accessed data (by filtering on its key prefix) and transitions those objects to the Standard-IA tier after they reach three months of age. This ensures that only the older, rarely accessed objects move to a lower-cost, yet immediately available, storage class.
NEW QUESTION # 794
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