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NEW QUESTION 47
There is a requirement for an application hosted on a VPC to access the On-premise LDAP server. The VPC and the On-premise location are connected via an I PSec VPN. Which of the below are the right options for the application to authenticate each user. Choose 2 answers from the options below
- A. The application authenticates against LDAP and retrieves the name of an 1AM role associated with the user. The application then calls the 1AM Security Token Service to assume that 1AM role. The application can use the temporary credentials to access any AWS resources.
- B. Develop an identity broker that authenticates against LDAP and then calls 1AM Security Token Service to get 1AM federated user credentials. The application calls the identity broker to get 1AM federated user credentials with access to the appropriate AWS service.
- C. The application authenticates against LDAP the application then calls the AWS identity and Access Management (1AM) Security service to log in to 1AM using the LDAP credentials the application can use the 1AM temporary credentials to access the appropriate AWS service.
- D. Develop an identity broker that authenticates against 1AM security Token service to assume a 1AM role in order to get temporary AWS security credentials The application calls the identity broker to get AWS temporary security credentials.
Answer: A,B
Explanation:
Explanation
When you have the need for an in-premise environment to work with a cloud environment, you would normally have 2 artefacts for authentication purposes
* An identity store – So this is the on-premise store such as Active Directory which stores all the information for the user’s and the groups they below to.
* An identity broker – This is used as an intermediate agent between the on-premise location and the cloud environment. In Windows you have a system known as Active Directory Federation services to provide this facility.
Hence in the above case, you need to have an identity broker which can work with the identity store and the Security Token service in aws. An example diagram of how this works from the aws documentation is given below.
For more information on federated access, please visit the below link:
* http://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_common-scenarios_federated-users.htmI
NEW QUESTION 48
Which status represents a failure state in AWS CloudFormation?
- A. <code>DELETE_COMPLETE_WITH_ARTIFACTS</code>
- B. <code>ROLLBACK_IN_PROGRESS</code>
- C. <code>UPDATE_COMPLETE_CLEANUP_IN_PROGRESS</code>
- D. <code>ROLLBACK_FAILED</code>
Answer: B
Explanation:
ROLLBACK_IN_PROGRESS means an UpdateStack operation failed and the stack is in the process of trying to return to the valid, pre-update state.
UPDATE_COMPLETE_CLEANUP_IN_PROGRESS means an update was successful, and CloudFormation is deleting any replaced, no longer used resources. ROLLBACK_FAILED is not a CloudFormation state (but UPDATE_ROLLBACK_FAILED is).
DELETE_COMPLETE_WITH_ARTIFACTS does not exist at all.
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating- stacks.html
NEW QUESTION 49
Your API requires the ability to stay online during AWS regional failures. Your API does not store any state, it only aggregates data from other sources – you do not have a database. What is a simple but effective way to achieve this uptime goal?
- A. Use an ELB and a cross-zone ELB deployment to create redundancy across datacenters. Even if a region fails, the other AZ will stay online.
- B. Create a Route53 Weighted Round Robin record, and if one region goes down, have that region redirect to the other region.
- C. Use a CloudFront distribution to serve up your API. Even if the region your API is in goes down, the edge locations CloudFront uses will be fine.
- D. Create a Route53 Latency Based Routing Record with Failover and point it to two identical deployments of your stateless API in two different regions. Make sure both regions use Auto Scaling Groups behind ELBs.
Answer: D
Explanation:
Latency Based Records allow request distribution when all is well with both regions, and the Failover component enables fallbacks between regions. By adding in the ELB and ASG, your system in the surviving region can expand to meet 100% of demand instead of the original fraction, whenever failover occurs.
http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover.html
NEW QUESTION 50
A company is using an AWS CloudFormation template to deploy web applications. The template requires that manual changes be made for each of the three major environments: production, staging, and development. The current sprint includes the new implementation and configuration of AWS CodePipeline for automated deployments. What changes should the DevOps Engineer make to ensure that the CloudFormation template is reusable across multiple pipelines?
- A. Set up a CodePipeline pipeline that has multiple stages, one for each development environment. Use AWS Lambda functions to trigger CloudFormation deployments to dynamically alter the UserData of the Amazon EC2 instances launched in each environment.
- B. Use CloudFormation input parameters to dynamically alter the LaunchConfiguration and UserData sections of each Amazon EC2 instance every time the CloudFormation stack is updated.
- C. Set up a CodePipeline pipeline for each environment to use input parameters. Use CloudFormation mappings to switch associated UserData for the Amazon EC2 instances to match the environment being launched.
- D. Use a CloudFormation custom resource to query the status of the CodePipeline to determine which environment is launched. Dynamically alter the launch configuration of the Amazon EC2 instances.
Answer: C
Explanation:
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/continuous-delivery-codepipeline-parameter-override-functions.html
NEW QUESTION 51
……
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