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Amazon AWS Certified Developer - Associate Sample Questions (Q859-Q864):

NEW QUESTION # 859
A developer is building an application that stores objects in an Amazon S3 bucket. The bucket does not have versioning enabled. The objects are accessed rarely after 1 week. However, the objects must be immediately available at all times.
The developer wants to optimize storage costs for the S3 bucket.
Which solution will meet this requirement?

A. Create an S3 Lifecycle rule to delete objects that have delete markers.
B. Create an S3 Lifecycle rule to transition objects to S3 Glacier Flexible Retrieval after 7 days.
C. Create an S3 Lifecycle rule to expire objects after 7 days.
D. Create an S3 Lifecycle rule to transition objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 7 days.

Answer: D

Explanation:
The objects are "rarely accessed after 1 week" but must remain immediately available at all times. That means the storage class must support millisecond access without a restore process. S3 Standard-Infrequent Access (Standard-IA) is designed for exactly this: lower storage cost than S3 Standard, while still providing rapid access when needed.
With option B, an S3 Lifecycle rule transitions objects from S3 Standard to S3 Standard-IA after 7 days. This aligns perfectly with the usage pattern: frequent access initially, then infrequent access after a week, while keeping immediate availability.
Option C (S3 Glacier Flexible Retrieval) is not appropriate because Glacier classes are archival. Access typically requires a restore operation and retrieval time (minutes to hours), which violates "immediately available at all times." Option A expires objects, which deletes them after 7 days-this contradicts the requirement to keep objects available.
Option D is irrelevant because delete markers exist only when versioning is enabled. The bucket does not have versioning enabled, so this rule would not help.
Therefore, transitioning to S3 Standard-IA after 7 days is the correct cost-optimized solution while maintaining immediate availability.

NEW QUESTION # 860
A company is using the AWS Serverless Application Model (AWS SAM) to develop a social media application. A developer needs a quick way to test AWS Lambda functions locally by using test event payloads. The developer needs the structure of these test event payloads to match the actual events that AWS services create.

A. Use the sam local generate-event command to create test payloads for local testing.
B. Store manually created test event payloads locally. Use the sam local invoke command with the file path to the payloads.
C. Store manually created test event payloads in an Amazon S3 bucket. Use the sam local invoke command with the S3 path to the payloads.
D. Create shareable test Lambda events. Use these test Lambda events for local testing.

Answer: A

Explanation:
Comprehensive Detailed Step by Step Explanation with All AWS Developer References:The AWS Serverless Application Model (SAM) includes features for local testing and debugging of AWS Lambda functions. One of the most efficient ways to generate test payloads that match actual AWS event structures is by using the sam local generate-event command.
* sam local generate-event: This command allows developers to create pre-configured test event payloads for various AWS services (e.g., S3, API Gateway, SNS). These generated events accurately reflect the format that the service would use in a live environment, reducing the manual work required to create these events from scratch.
* Operational Overhead: This approach reduces overhead since the developer does not need to manually create or maintain test events. It ensures that the structure is correct and up-to-date with the latest AWS standards.
* Alternatives:
* Option A suggests using shareable test events, but manually creating or sharing these events introduces more overhead.
* Option B and C both involve manually storing and maintaining test events, which adds unnecessary complexity compared to using sam local generate-event.

NEW QUESTION # 861
A developer is creating a simple proof-of-concept demo by using AWS CloudFormation and AWS Lambda functions The demo will use a CloudFormation template to deploy an existing Lambda function The Lambda function uses deployment packages and dependencies stored in Amazon S3 The developer defined anAWS Lambda Function resource in a CloudFormation template. The developer needs to add the S3 bucket to the CloudFormation template.
What should the developer do to meet these requirements with the LEAST development effort?

A. Add the function code in the CloudFormation template as the ZipFile property.
B. Find the S3 key for the Lambda function Add the S3 key as the ZipFile property in the CloudFormation template.
C. Add the relevant key and bucket to the S3Bucket and S3Key properties in the CloudFormation template
D. Add the function code in the CloudFormation template inline as the code property

Answer: C

Explanation:
Explanation
The easiest way to add the S3 bucket to the CloudFormation template is to use the S3Bucket and S3Key properties of the AWS::Lambda::Function resource. These properties specify the name of the S3 bucket and the location of the .zip file that contains the function code and dependencies. This way, the developer does not need to modify the function code or upload it to a different location. The other options are either not feasible or not efficient. The code property can only be used for inline code, not for code stored in S3. The ZipFile property can only be used for code that is less than 4096 bytes, not for code that has dependencies. Finding the S3 key for the Lambda function and adding it as the ZipFile property would not work, as the ZipFile property expects a base64-encoded .zip file, not an S3 location. References
* AWS::Lambda::Function - AWS CloudFormation
* Deploying Lambda functions as .zip file archives
* AWS Lambda Function Code - AWS CloudFormation

NEW QUESTION # 862
A company with multiple branch locations has an analytics and reporting application. Each branch office pushes a sales report to a shared Amazon S3 bucket at a predefined time each day. The company has developed an AWS Lambda function that analyzes the reports from all branch offices in a single pass. The Lambda function stores the results in a database.
The company needs to start the analysis once each day at a specific time.
Which solution will meet these requirements MOST cost-effectively?

A. Configure the Lambda function to run continuously and to begin analysis only at the predefined time each day.
B. Create an Amazon EventBridge scheduled rule that invokes the Lambda function once each day at the predefined time.
C. Create an AWS Step Functions state machine that invokes the Lambda function once each day at the predefined time.
D. Configure an S3 event notification to invoke the Lambda function when a branch office uploads a sales report.

Answer: B

NEW QUESTION # 863
A developer needs to troubleshoot an AWS Lambda function in a development environment. The Lambda function is configured in VPC mode and needs to connect to an existing Amazon RDS for SOL Server DB instance. The DB instance is deployed in a private subnet and accepts connections by using port 1433.
When the developer tests the function, the function reports an error when it tries to connect to the database.
Which combination of steps should the developer take to diagnose this issue? (Select TWO.)

A. Check that the function's security group has Inbound access on port 1433 from the DB Instance's security group. Check that the DB instance's security group has outbound access on port 1433 to the function's security group.
B. Check that the function's security group has outbound access on port 1433 to the DB instance's security group. Check that the DB instance's security group has inbound access on port 1433 from the function's security group.
C. Check that the function's execution rote permissions include ec2: CreateNetworklnterface. ec2:
DescribeNetworklnterfaces. and ec2: DeleteNetworklnterface.
D. Check that the VPC is set up for a NAT gateway. Check that the DB instance has the public access option turned on.
E. Check that the function's execution role permissions include rds:DescribeDBInstances, rds: ModifyDB Instance, and rds:DescribeDBSecurityGroups for the DB instance.

Answer: B,C

NEW QUESTION # 864
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