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Download AWS Certified Developer Associate Exam Exam Dumps
NEW QUESTION 37
A company has a large number of documents that are stored securely in Amazon S3 The company is creating an application that occasionally will read these documents The application will be deployed on Amazon EC2 instances.
The company’s security requirements mandate that no long-term credentials can be stored on the EC2 instances and that only the needed documents can be accessed Only authorized users and applications can access the documents access must be logged by Amazon S3, and each document must follow S3 Lifecycle policies for archival and destruction What should a developer do to meet these requirements?
- A. Create a user that has programmatic credentials, and attach a policy that allows read access to the S3 bucket Use the AWS CLI to configure those credentials for the EC2 instances to use Create an Amazon Machine Image (AMI), and add the access key and secret access key to the user data section to create environment variables Use the AMI to launch each EC2 instance that runs the application Add application code to use the keys that are stored in the environment variables to access the S3 bucket objects as needed.
- B. Create an IAM role with permissions to read objects from Amazon S3 Attach the role to the EC2 instances as an instance profile Add application code to access the objects in the S3 bucket as needed.
- C. Modify the S3 bucket, make the bucket public, and make each object public Add application code to make REST calls to access the objects in the S3 bucket as needed
- D. Create an event to invoke an AWS Lambda function when a document is uploaded Configure the function to write the documents to an Amazon Elastic File System (Amazon EFS) file system Configure the EC2 instances to mount the EFS file system Configure the application to access the documents that are stored m the file system as needed
Answer: B
NEW QUESTION 38
A developer is using Amazon DynamoDB to store application data . The developer wants to further improve application performance by reducing response limes for read and write operations.
Which DynamoDB feature should be used to meet these requirement?
- A. Amazon DynamoDB Accelerator
- B. Amazon DynamoDB global tables
- C. Amazon DynamoDB transactions
- D. Amazon DynamoDB Streams
Answer: A
Explanation:
Explanation
https://aws.amazon.com/ko/blogs/database/amazon-dynamodb-accelerator-dax-a-read-throughwrite-through-cach
NEW QUESTION 39
An Amazon RDS database instance is used by many applications to look up historical data. The query rate is relatively constant. When the historical data is updated each day, the resulting write traffic slows the read query performance and affects all application users.
What can be done to eliminate the performance impact on application users?
- A. Create an RDS Read Replica and direct all read traffic to the replica.
- B. Use Amazon DynamoDB instead of Amazon RDS to buffer the read traffic.
- C. Implement Amazon ElastiCache in front of Amazon RDS to buffer the write traffic.
- D. Make sure Amazon RDS is Multi-AZ so it can better absorb increased traffic.
Answer: A
Explanation:
Explanation
https://aws.amazon.com/rds/details/read-replicas/
NEW QUESTION 40
A company s website runs on an Amazon EC2 instance and uses Auto Scale the environment during peak times Website users across the world are experiencing high to sea latency due to static content on the EC2 instance, even during non-peak hours.
Which combination of steps will resolve the latency issue? (Select TWO )
- A. Create an Amazon CloudFront distribution to cache the static content
- B. Double the Auto Scaling group’s maximum number of servers.
- C. Host the application code on AWS Lambda
- D. Store the application’s static content in Amazon S3
- E. Scale vertically by resizing the EC2 instances
Answer: D,E
Explanation:
Reference:
https://aws.amazon.com/getting-started/tutorials/deliver-content-faster/
NEW QUESTION 41
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