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Amazon AWS Certified Developer - Associate Sample Questions (Q25-Q30):

NEW QUESTION # 25
An application is running on an EC2 instance. The Developer wants to store an application metric in Amazon CloudWatch.
What is the best practice for implementing this requirement?

  • A. Publish the metric data to an Amazon Kinesis Stream using a PutRecord API call. Subscribe a Lambda function that publishes data to CloudWatch.
  • B. Use the CloudWatch PutMetricData API call to submit a custom metric to CloudWatch. Launch the EC2 instance with the required IAM role to enable the API call.
  • C. Use the CloudWatch PutMetricData API call to submit a custom metric to CloudWatch. Provide the required credentials to enable the API call.
  • D. Use the PUT Object API call to send data to an S3 bucket. Use an event notification to invoke a Lambda function to publish data to CloudWatch.

Answer: B Explanation:
Explanation
https://docs.aws.amazon.com/IAM/latest/UserGuide/idrolesuse_switch-role-ec2.html
NEW QUESTION # 26
A user is planning to host a web server as well as an app server on a single EC2 instance which is a part of the public subnet of a VPC. How can the user setup to have two separate public IPs and separate security groups for both the application as well as the web server?

  • A. Launch a VPC instance with two network interfaces. Assign a separate security group to each and AWS will assign a separate public IP to them.
  • B. Launch a VPC instance with two network interfaces. Assign a separate security group and elastic IP to them.
  • C. Launch VPC with two separate subnets and make the instance a part of both the subnets.
  • D. Launch a VPC with ELB such that it redirects requests to separate VPC instances of the public subnet.

Answer: B Explanation:
If you need to host multiple websites(with different IPs) on a single EC2 instance, the following is the suggested method from AWS.
Launch a VPC instance with two network interfaces
Assign elastic IPs from VPC EIP pool to those interfaces (Because, when the user has attached more than one network interface with an instance, AWS cannot assign public IPs to them.) Assign separate Security Groups if separate Security Groups are needed This scenario also helps for operating network appliances, such as firewalls or load balancers that have multiple private IP addresses for each network interface.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MultipleIP.html
NEW QUESTION # 27
Which of the following are valid arguments for an SNS Publish request? Choose 3 answers

  • A. Subject
  • B. Format
  • C. Language
  • D. Destination
  • E. TopicAm
  • F. Message

Answer: A,E,F
NEW QUESTION # 28
A developer is implementing authentication and authorization for an application. The developer needs to ensure that the user credentials are never exposed.
Which approach should the developer take to meet this requirement?

  • A. Store the user credentials in Amazon RDS. Enable the encryption option for the Amazon RDS DB instances. Build an API using AWS Lambda to validate the credentials and authorize users.
  • B. Store the user credentials in Amazon DynamoDB. Build an AWS Lambda function to validate the credentials and authorize users.
  • C. Use Amazon Cognito to configure a user pool, and user the Cognito API to authenticate and authorize the user.
  • D. Deploy a custom authentication and authorization API on an Amazon EC2 instance. Store the user credentials in Amazon S3 and encrypt the credentials using Amazon S3 server-side encryption.

Answer: C Explanation:
Explanation/Reference: https://aws.amazon.com/blogs/mobile/understanding-amazon-cognito-user-pool-oauth-2-0-grants/
NEW QUESTION # 29
A Developer created a Lambda function for a web application backend. When testing the Lambda function from the AWS Lambda console, the Developer can see that the function is being executed, but there is no log data being generated in Amazon CloudWatch Logs, even after several minutes.
What could cause this situation?

  • A. The Lambda function does not have any explicit log statements for the log data to send it to CloudWatch Logs.
  • B. The Lambda function is missing a target CloudWatch Log group.
  • C. The execution role for the Lambda function is missing permissions to write log data to the CloudWatch Logs.
  • D. The Lambda function is missing CloudWatch Logs as a source trigger to send log data.

Answer: C
NEW QUESTION # 30
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