Amazon Amazon Certifications ANS-C00 Questions & Answers

• Question 301:

  When an AWS Config rule is triggered a JSON object known as an AWS Config Event is created. This object contains another JSON string in its ____ parameter, which describes the event that triggered the rule.

  A. resultToken

  B. eventLeftScope

  C. invokingEvent

  D. configRuleName

  Correct Answer: C

  Explanation: The JSON object for an AWS Config event contains an invoking Event attribute, which describes the event that triggers the evaluation for a rule. If the event is published in response to a resource configuration change, the value for this attribute is a string that contains a JSON configuration Item or a configuration Item Summary (for oversized configuration items). The configuration item represents the state of the resource at the moment that AWS Config detected the change. If the event is published for a periodic evaluation, the value is a string that contains a JSON object. The object includes information about the evaluation that was triggered. For each type of event, a function must parse the string with a JSON parser to be able to evaluate its contents.

  Reference: http://docs.aws.amazon.com/config/latest/developerguide/evaluate-config_develop-rules_exa mple-events.html

• Question 302:

  You can use the ____ command of the AWS Config service CLI to see the compliance state for each AWS resource of a specific type.

  A. describe-compliance-by-resource

  B. get-compliance-details-by-config-rule

  C. describe-compliance-by-config-rule

  D. get-compliance-details-by-resource

  Correct Answer: A

  Explanation: You can use the AWS Config console, AWS CLI, or AWS Config API to view the compliance state of your rules and resources. The describe-compliance-by-resource command of the AWS Config CLI to see the compliance state for each AWS resource of a specific type. This is distinct from the describe-complianceby-config-rule command, which gives the compliance state of each rule in AWS Config .

  Reference: http://docs.aws.amazon.com/config/latest/developerguide/evaluate-config_viewcompliance.html

• Question 303:

  You would like to automate the monitoring of changes in the configurations of your AWS resources and respond programmatically to configurations of only a certain type. To do this, you could use Amazon ____ as the endpoint for the Amazon SNS topics that generate messages from AWS Config.

  A. Kinesis

  B. Simple Email Service (SES)

  C. Simple Storage Service (S3)

  D. Simple Queue Service (SQS)

  Correct Answer: D

  Explanation: AWS Config uses Amazon Simple Notification Service (SNS) to send you notifications every time a supported AWS resource is created, updated, or otherwise modified as a result of user API activity. However, you might be interested in only certain resource configuration changes. For example, you might consider it critical to know when someone modifies the configuration of a security group, but not need to know every time there is a change to tags on your Amazon EC2 instances. Or, you might want to write a program that performs specific actions when specific resources are updated. For example, you might want to start a certain workflow when a security group configuration is changed. If you want to programmatically consume the data from AWS Config in these or other ways, use an Amazon Simple Queue Service queue as the notification endpoint for Amazon SNS.

  Reference: http://docs.aws.amazon.com/config/latest/developerguide/monitor-resource-changes.html

• Question 304:

  You can turn on the AWS Config service from the AWS CLI by running the subscribe command and passing as parameters a valid IAM role, SNS topic, and ____.

  A. EBS volume

  B. EC2 instance

  C. S3 bucket

  D. Kinesis stream

  Correct Answer: C

  Explanation: You can use the AWS CLI to turn on AWS Config. All it takes is the subscribe command and a few additional parameters. The parameters are -s3-bucket, which specifies the S3 bucket to which AWS Config data will be saved, -sns-topic, which specifies to which SNS topic messages from AWS Config will be sent, and -iam-role, which is an IAM role containing appropriate permissions for AWS Config to access the resources it monitors.

  Reference: http://docs.aws.amazon.com/config/latest/developerguide/gs-cli-subscribe.html

• Question 305:

  A company is using AWS to host all of its applications. Each application is isolated in its own Amazon VPC. Different environments such as Development, Test, and Production are also isolated in their own VPCs. The Network Engineer needs to automate VPC creation to enforce the company's network and security standards. Additionally, the CIDR range used in each VPC needs to be unique.

  Which solution meets all of these requirements?

  A. Use AWS CloudFormation to deploy the VPC infrastructure and a custom resource to request a CIDR range from an external IP address management (IPAM) service.

  B. Use AWS OpsWorks to deploy the VPC infrastructure and a custom resource to request a CIDR range from an external IP address management (IPAM) service.

  C. Use the VPC wizard in the AWS Management Console. Type in the CIDR blocks for the VPC and subnets.

  D. Create the VPCs using AWS CLI and use the dry-run flag to validate if the current CIDR range is in use.

  Correct Answer: A

• Question 306:

  A company's web application is deployed on Amazon EC2 instances behind a public Application Load Balancer. The application flags malicious requests and uses an AWS Lambda function to add the offending IP addresses to the network ACL to block any further request for 24 hours. Recently, the application has been receiving more malicious requests, which causes the network ACL to reach its limit of allowed entries.

  Which action should be taken to block more IP addresses, without compromising the existing security requirements?

  A. Update the AWS Lambda function to remove blocked entries from the network ACL after 2 hours.

  B. Update the AWS Lambda function to block malicious IPs in security groups rather than the network ACL.

  C. Update the AWS Lambda function to block malicious IPs in AWS WAF attached to the Application Load Balancer.

  D. Update the AWS Lambda function to add an additional network ACL to the subnets once the limit for the previous ones has been reached.

  Correct Answer: D

• Question 307:

  A company's Network Engineering team is solely responsible for deploying VPC infrastructure using AWS CloudFormation. The company wants to give its Developers the ability to launch applications using CloudFormation templates so that subnets can be created using available CIDR ranges.

  What should be done to meet these requirements?

  A. Create a CloudFormation templates with Amazon EC2 resources that rely on cfn-init and cfn-signals to inform the stack of available CIDR ranges.

  B. Create a CloudFormation template with a custom resource that analyzes traffic activity in VPC Flow Logs and reports on available CIDR ranges.

  C. Create a CloudFormation template that references the Fn::Cidr intrinsic function within a subnet resource to select an available CIDR range.

  D. Create a CloudFormation template with a custom resource that uses AWS Lambda and Amazon DynamoDB to manage available CIDR ranges.

  Correct Answer: C

• Question 308:

  A company has two redundant AWS Direct Connect connections to a VPC. The VPC is configured using BGP metrics so that one Direct Connect connection is used as the primary traffic path. The company wants the primary Direct Connect connection to fail to the secondary in less than one second.

  What should be done to meet this requirement?

  A. Configure BGP on the company's router with a keep-alive to 300 ms and the BGP hold timer to 900 ms.

  B. Enable Bidirectional Forwarding Detection (BFD) on the company's router with a detection minimum interval of 300 ms and a BFD liveness detection multiplier of 3.

  C. Enable Dead Peer Detection (DPD) on the company's router with a detection minimum interval of 300 ms and a DPD liveliness detection multiplier of 3.

  D. Enable Bidirectional Forwarding Detection (BFD) echo mode on the company's router and disable sending the Internet Control Message Protocol (ICMP) IP packet requests.

  Correct Answer: B

  Reference: https://aws.amazon.com/directconnect/faqs/

• Question 309:

  A company provisions an AWS Direct Connect connection to permit access to Amazon EC2 resources in several Amazon VPCs and to data stored in private Amazon S3 buckets. The Network Engineer needs to configure the company's on-premises router for this Direct Connect connection.

  Which of the following actions will require the LEAST amount of configuration overhead on the customer router?

  A. Configure private virtual interfaces for the VPC resources and for Amazon S3.

  B. Configure private virtual interfaces for the VPC resources and a public virtual interface for Amazon S3.

  C. Configure a private virtual interface to a Direct Connect gateway for the VPC resources and for Amazon S3.

  D. Configure a private virtual interface to a Direct Connect gateway for the VPC resources and a public virtual interface for Amazon S3.

  Correct Answer: A

• Question 310:

  A company has recently established an AWS Direct Connect connection from its on-premises data center to AWS. A Network Engineer has blocked all traffic destined for Amazon S3 over the company's gateway to the internet from its on-premises firewall. S3 traffic should only traverse the Direct Connect connection. Currently, no one in the on-premises data center can access Amazon S3.

  Which solution will resolve this connectivity issue?

  A. Configure a private virtual interface on the Direct Connect connection. Update the on-premises routing tables to choose Direct Connect as the preferred next hop for traffic destined for Amazon S3.

  B. Establish an S3 VPC endpoint for the company's Amazon VPC. Configure a private virtual interface on the Direct Connect connection. Update the on-premises routing tables to choose Direct Connect as the preferred next hop.

  C. Configure a public virtual interface on the Direct Connect connection. Update the on-premises routing tables to choose Direct Connect as the preferred next hop for traffic destined for Amazon S3.

  D. Configure a public virtual interface on the Direct Connect connection. Establish an AWS managed VPN over the connection. Update the on-premises routing tables to choose the VPN connection as the preferred next hop.

  Correct Answer: A