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The AWS Certified Developer - Associate certification exam consists of 65 multiple-choice and multiple-answer questions that must be completed within 130 minutes. AWS-Developer exam is available in multiple languages and can be taken at any Pearson VUE testing center worldwide. Candidates who pass the exam will receive a certificate from Amazon Web Services that validates their skills and expertise in developing and maintaining applications on the AWS platform.

The AWS-Certified-Developer-Associate certification exam tests the developer's knowledge of AWS services such as Elastic Compute Cloud (EC2), Simple Storage Service (S3), and Relational Database Service (RDS). AWS-Developer Exam also covers topics such as security, deployment, and troubleshooting of AWS applications. Candidates taking AWS-Developer exam need to have a good understanding of AWS architecture, development tools, and best practices.

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Amazon AWS Certified Developer Associate Exam (DVA-C02) Sample Questions (Q224-Q229):

NEW QUESTION # 224
You have a number of image files to encode. In an Amazon SQS worker queue, you create an Amazon SQS message for each file specifying the command (jpeg-encode) and the location of the file in Amazon S3. Which of the following statements best describes the functionality of Amazon SQS?

A. Amazon SQS is a distributed queuing system that is optimized for vertical scalability and for single-threaded sending or receiving speeds.
B. Amazon SQS is a distributed queuing system that is optimized for horizontal scalability, not for single-threaded sending or receiving speeds.
C. Amazon SQS is for single-threaded sending or receiving speeds.
D. Amazon SQS is a non-distributed queuing system.

Answer: B

Explanation:
Amazon SQS is a distributed queuing system that is optimized for horizontal scalability, not for single-threaded sending or receiving speeds. A single client can send or receive Amazon SQS messages at a rate of about 5 to 50 messages per second. Higher receive performance can be achieved by requesting multiple messages (up to 10) in a single call. It may take several seconds before a message that has been to a queue is available to be received.
http://media.amazonwebservices.com/AWS_Storage_Options.pdf

NEW QUESTION # 225
A developer is testing a new file storage application that uses an Amazon CloudFront distribution to serve content from an Amazon S3 bucket. The distribution accesses the S3 bucket by using an origin access identity (OAI). The S3 bucket's permissions explicitly deny access to all other users.
The application prompts users to authenticate on a login page and then uses signed cookies to allow users to access their personal storage directories. The developer has configured the distribution to use its default cache behavior with restricted viewer access and has set the origin to point to the S3 bucket. However, when the developer tries to navigate to the login page, the developer receives a 403 Forbidden error.
The developer needs to implement a solution to allow unauthenticated access to the login page. The solution also must keep all private content secure.
Which solution will meet these requirements?

A. Add a bucket policy to the S3 bucket to allow read access. Set the resource on the policy to the Amazon Resource Name (ARN) of the login page object in the S3 bucket. Add a CloudFront function to the default cache behavior to redirect unauthorized requests to the login page's S3 URL.
B. Add a second origin as a failover origin to the default cache behavior. Point the failover origin to the S3 bucket. Set the path pattern for the primary origin to *, and make viewer access restricted. Set the path pattern for the failover origin to the path of the login page, and make viewer access unrestricted.
C. Add a second cache behavior to the distribution with the same origin as the default cache behavior. Set the path pattern for the second cache behavior to *, and make viewer access restricted. Change the default cache behavior's path pattern to the path of the login page, and make viewer access unrestricted.
D. Add a second cache behavior to the distribution with the same origin as the default cache behavior. Set the path pattern for the second cache behavior to the path of the login page, and make viewer access unrestricted. Keep the default cache behavior's settings unchanged.

Answer: D

Explanation:
The solution that will meet the requirements is to add a second cache behavior to the distribution with the same origin as the default cache behavior. Set the path pattern for the second cache behavior to the path of the login page, and make viewer access unrestricted. Keep the default cache behavior's settings unchanged. This way, the login page can be accessed without authentication, while all other content remains secure and requires signed cookies. The other options either do not allow unauthenticated access to the login page, or expose private content to unauthorized users.
Reference: Restricting Access to Amazon S3 Content by Using an Origin Access Identity

NEW QUESTION # 226
A company's Security Engineer is copying all application logs to centralized Amazon S3 buckets. Currently, each of the company's application is in its own AWS account, and logs are pushed into S3 buckets associated with each account. The Engineer will deploy an AWS Lambda function into each account that copies the relevant log files to the centralized S3 bucket.
The Security Engineer is unable to access the log files in the centralized S3 bucket. The Engineer's IAM user policy from the centralized account looks like this:

The centralized S3 bucket policy looks like this:

Why is the Security Engineer unable to access the log files?

A. The S3 bucket policy does not explicitly allow the Security Engineer access to the objects in the bucket.
B. The Security Engineer's IAM policy does not grant permissions to read objects in the S3 bucket.
C. The s3:PutObject and s3:PutObjectAcl permissions should be applied at the S3 bucket level.
D. The object ACLs are not being updated to allow the users within the centralized account to access the objects.

Answer: C

NEW QUESTION # 227
A company runs an application on AWS The application stores data in an Amazon DynamoDB table Some queries are taking a long time to run These slow queries involve an attribute that is not the table's partition key or sort key The amount of data that the application stores in the DynamoDB table is expected to increase significantly. A developer must increase the performance of the queries.
Which solution will meet these requirements'?

A. Increase the page size for each request by setting the Limit parameter to be higher than the default value Configure the application to retry any request that exceeds the provisioned throughput.
B. Turn on read capacity auto scaling for the DynamoDB table. Increase the maximum read capacity units (RCUs).
C. Create a global secondary index (GSI). Set query attribute to be the partition key of the index
D. Perform a parallel scan operation by issuing individual scan requests in the parameters specify the segment for the scan requests and the total number of segments for the parallel scan.

Answer: C

Explanation:
* Global Secondary Index (GSI): GSIs enable alternative query patterns on a DynamoDB table by using different partition and sort keys.
* Addressing Query Bottleneck: By making the slow-query attribute the GSI's partition key, you optimize queries on that attribute.
* Scalability: GSIs automatically scale to handle increasing data volumes.
References:
Amazon DynamoDB Global Secondary Indexes: https://docs.aws.amazon.com/amazondynamodb/latest
/developerguide/GSI.html

NEW QUESTION # 228
A user is setting up an Elastic Load Balancer(ELB). Which of the below parameters should the user consider so as the instance gets registered with the ELB?

A. IP address
B. ELB DNS
C. Security group
D. ELB IP

Answer: A

Explanation:
The EC2 instances are registered with the load balancer using the IP addresses associated with the instances. When an instance is stopped and then started, the IP address associated with the instance changes. This prevents the load balancer from routing traffic to the restarted instance.
When the user stops and then starts registered EC2 instances, it is recommended that to de- register the stopped instance from load balancer, and then register the restarted instance. Failure to do so may prevent the load balancer from performing health checks and routing the traffic to the restarted instance.

NEW QUESTION # 229
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