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| Certification Vendor: | Amazon Web Services (AWS) |
|---|---|
| Exam Name: | AWS Certified Developer - Associate |
| Exam Number: | DVA-C02 |
| Exam Format: | Multiple choice, Multiple response |
| Exam Duration: | 130 minutes |
| Related Certifications: | AWS Certified DevOps Engineer - Professional AWS Certified Cloud Practitioner |
| Exam Price: | 150 USD |
| Available Languages: | English, Korean, Simplified Chinese, Japanese, Portuguese (Brazil), Spanish (Latin America) |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Certificate Validity Period: | 3 years |
| Passing Score: | 720 (scaled score of 100โ1,000) |
| 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 Certification Exam is also suitable for professionals who want to pursue a career in cloud computing and want to establish themselves as experts in AWS development. Earning this certification demonstrates a candidate's comprehensive knowledge of AWS services and their ability to design, develop, and deploy secure, scalable, and fault-tolerant applications in the cloud. Overall, the Amazon DVA-C02 certification is a valuable credential for developers seeking to advance their career in cloud computing.
NEW QUESTION # 205
A developer is creating an AWS Lambda function that searches for Items from an Amazon DynamoDQ table that contains customer contact information. The DynamoDB table items have the customers as the partition and additional properties such as customer -type, name, and job_title.
The Lambda function runs whenever a user types a new character into the customer_type text Input. The developer wants to search to return partial matches of all tne email_address property of a particular customer type. The developer does not want to recreate the DynamoDB table.
What should the developer do to meet these requirements?
Answer: D
Explanation:
Explanation
The solution that will meet the requirements is to add a global secondary index (GSI) to the DynamoDB table with customer_type as the partition key and email_address as the sort key. Perform a query operation on the GSI by using the begins_with key condition expression with the email_address property. This way, the developer can search for partial matches of the email_address property of a particular customer type without recreating the DynamoDB table. The other options either involve using a local secondary index (LSI), which requires recreating the table, or using a different partition key, which does not allow filtering by customer_type.
NEW QUESTION # 206
A social media company is designing a platform that allows users to upload data, which is stored in Amazon S3. Users can upload data encrypted with a public key. The company wants to ensure that only the company can decrypt the uploaded content using an asymmetric encryption key. The data must always be encrypted in transit and at rest.
Options:
Answer: B
Explanation:
Step 1: Problem Understanding
* Asymmetric Encryption Requirement: Users encrypt data with a public key, and only the company can decrypt it using a private key.
* Data Encryption at Rest and In Transit: The data must be encrypted during upload (in transit) and when stored in Amazon S3 (at rest).
Step 2: Solution Analysis
* Option A: Server-side encryption with Amazon S3 managed keys (SSE-S3).
* Amazon S3 manages the encryption and decryption keys.
* This does not meet the requirement for asymmetric encryption, where the company uses a private key.
* Not suitable.
* Option B: Server-side encryption with customer-provided keys (SSE-C).
* Requires the user to supply encryption keys during the upload process.
* Does not align with the asymmetric encryption requirement.
* Not suitable.
* Option C: Client-side encryption with a data key.
* Data key encryption is symmetric, not asymmetric.
* Does not satisfy the requirement for a public-private key pair.
* Not suitable.
* Option D: Client-side encryption with a customer-managed encryption key.
* Data is encrypted on the client side using the public key.
* Only the company can decrypt the data using the corresponding private key.
* Data remains encrypted during upload (in transit) and in S3 (at rest).
* Correct option.
Step 3: Implementation Steps for Option D
* Generate Key Pair:
* The company generates an RSA key pair (public/private) for encryption and decryption.
* Encrypt Data on Client Side:
* Use the public key to encrypt the data before uploading to S3.
* S3 Upload:
* Upload the encrypted data to S3 over an HTTPS connection.
* Decrypt Data on the Server:
* Use the private key to decrypt data when needed.
AWS Developer References:
* Amazon S3 Encryption Options
* Asymmetric Key Cryptography in AWS
NEW QUESTION # 207
A company has an Amazon S3 bucket that contains sensitive dat
a. The data must be encrypted in transit and at rest. The company encrypts the data in the S3 bucket by using an AWS Key Management Service (AWS KMS) key. A developer needs to grant several other AWS accounts the permission to use the S3 GetObject operation to retrieve the data from the S3 bucket.
How can the developer enforce that all requests to retrieve the data provide encryption in transit?
Answer: B
Explanation:
Amazon S3 supports resource-based policies, which are JSON documents that specify the permissions for accessing S3 resources. A resource-based policy can be used to enforce encryption in transit by denying access to requests that do not use HTTPS. The condition key aws:SecureTransport can be used to check if the request was sent using SSL. If the value of this key is false, the request is denied; otherwise, the request is allowed. Reference: How do I use an S3 bucket policy to require requests to use Secure Socket Layer (SSL)?
NEW QUESTION # 208
A developer is creating an application that uses an AWS Lambda function to transform and load data from an Amazon S3 bucket. When the developer tests the application, the developer finds that some invocations of the Lambda function are slower than others.
The developer needs to update the Lambda function to have predictable invocation durations that run with low latency. Any initialization activities, such as loading libraries and instantiating clients, must run during allocation time rather than during actual function invocations.
Which combination of steps will meet these requirements? (Choose two.)
Answer: A,E
NEW QUESTION # 209
A developer has an application that makes batch requests directly to Amazon DynamoDB by using the BatchGetItem low-level API operation. The responses frequently return values in the UnprocessedKeys element.
Which actions should the developer take to increase the resiliency of the application when the batch response includes values in UnprocessedKeys? (Choose two.)
Answer: A,B
Explanation:
The UnprocessedKeys element indicates that the BatchGetItem operation did not process all of the requested items in the current response. This can happen if the response size limit is exceeded or if the table's provisioned throughput is exceeded. To handle this situation, the developer should retry the batch operation with exponential backoff and randomized delay to avoid throttling errors and reduce the load on the table. The developer should also use an AWS SDK to make the requests, as the SDKs automatically retry requests that return UnprocessedKeys.
References:
* [BatchGetItem - Amazon DynamoDB]
* [Working with Queries and Scans - Amazon DynamoDB]
* [Best Practices for Handling DynamoDB Throttling Errors]
NEW QUESTION # 210
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