Amazon Amazon Certifications ANS-C00 Questions & Answers

• Question 401:

  A Lambda function needs to access the private address of an Amazon ElastiCache cluster in a VPC. The Lambda function also needs to write messages to Amazon SQS. The Lambda function has been configured to run in a subnet in the VPC.

  Which of the following actions meet the requirements? (Choose two.)

  A. The Lambda function needs an IAM role to access Amazon SQS

  B. The Lambda function must route through a NAT gateway or NAT instance in another subnet to access the public SQS API.

  C. The Lambda function must be assigned a public IP address to access the public Amazon SQS API.

  D. The ElastiCache server outbound security group rules must be configured to permit the Lambda function's security group.

  E. The Lambda function must consume auto-assigned public IP addresses but not elastic IP addresses.

  Correct Answer: AC

  References: https://aws.amazon.com/premiumsupport/knowledge-center/internet-access-lambda-function/

• Question 402:

  You are deploying an EC2 instance in a private subnet that requires access to the Internet. One of the requirements for this solution is to restrict access to only particular URLs on a whitelist. In addition to the whitelisted URLs, the instances should be able to access any Amazon S3 bucket in the same region via any URL.

  Which of the following solutions should you deploy? (Choose two.)

  A. Include s3.amazonaws.com in the whitelist.

  B. Create a VPC endpoint for S3.

  C. Run Squid proxy on a NAT instance.

  D. Deploy a NAT gateway into your VPC.

  E. Utilize a security group to restrict access.

  Correct Answer: CD

• Question 403:

  Your company runs an HTTPS application using an Elastic Load Balancing (ELB) load balancer/PHP on nginx server/RDS in multiple Availability Zones. You need to apply Geographic Restriction and identify the client's IP address in your application to generate dynamic content.

  How should you utilize AWS services in a scalable fashion to perform this task?

  A. Modify the nginx log configuration to record value in X-Forwarded-For and use CloudFront to apply the Geographic Restriction.

  B. Enable ELB access logs to store the client IP address and parse these to dynamically modify a blacklist.

  C. Use X-Forwarded-For with security groups to apply the Geographic Restriction.

  D. Modify the application code to use value of X-Forwarded-For and CloudFront to apply the Geographic Restriction.

  Correct Answer: A

• Question 404:

  An organization processes consumer information submitted through its website. The organization's security policy requires that personally identifiable information (PII) elements are specifically encrypted at all times and as soon as feasible when received. The front-end Amazon EC2 instances should not have access to decrypted PII. A single service within the production VPC must decrypt the PII by leveraging an IAM role.

  Which combination of services will support these requirements? (Choose two.)

  A. Amazon Aurora in a private subnet

  B. Amazon CloudFront using AWS Lambda@Edge

  C. Customer-managed MySQL with Transparent Data Encryption

  D. Application Load Balancer using HTTPS listeners and targets

  E. AWS Key Management Services

  Correct Answer: CE

  References: https://noise.getoto.net/tag/aws-kms/

• Question 405:

  A legacy, on-premises web application cannot be load balanced effectively. There are both planned and unplanned events that cause usage spikes to millions of concurrent users. The existing infrastructure cannot handle the usage spikes. The CIO has mandated that the application be moved to the cloud to avoid further disruptions, with the additional requirement that source IP addresses be unaltered to support network traffic-monitoring needs. Which of the following designs will meet these requirements?

  A. Use an Auto Scaling group of Amazon EC2 instances behind a Classic Load Balancer.

  B. Use an Auto Scaling group of EC2 instances in a target group behind an Application Load Balancer.

  C. Use an Auto Scaling group of EC2 instances in a target group behind a Classic Load Balancer.

  D. Use an Auto Scaling group of EC2 instances in a target group behind a Network Load Balancer.

  Correct Answer: D

• Question 406:

  Refer to the image.

  

  You have three VPCs: A, B, and C. VPCs A and C are both peered with VPC B. The IP address ranges are as follows:

  1.

  VPC A: 10.0.0.0/16

  2.

  VPC B: 192.168.0.0/16

  3.

  VPC C: 10.0.0.0/16

  Instance i-1 in VPC A has the IP address 10.0.0.10. Instance i-2 in VPC C has the IP address 10.0.0.10. Instances i-3 and i-4 in VPC B have the IP addresses 192.168.1.10 and 192.168.1.20, respectively, i-3 and i-4 are in the subnet 192.168.1.0/24.

  1.

  i-3 must be able to communicate with i-1

  2.

  i-4 must be able to communicate with i-2

  3.

  i-3 and i-4 are able to communicate with i-1, but not with i-2.

  Which two steps will fix this problem? (Choose two.)

  A. Create subnets 192.168.1.0/28 and 192.168.1.16/28. Move i-3 and i-4 to these subnets, respectively.

  B. Create subnets 192.168.1.0/27 and 192.168.1.16/27. Move i-3 and i-4 to these subnets, respectively.

  C. Change the IP address of i-2 to 10.0.0.100. Assign it an elastic IP address.

  D. Create a new route table for VPC B, with unique route entries for destination VPC A and destination VPC C.

  E. Create two route tables: one with a route for destination VPC A, and another for destination VPC C.

  Correct Answer: AE

• Question 407:

  A multinational organization has applications deployed in three different AWS regions. These applications must securely communicate with each other by VPN. According to the organization's security team, the VPN must meet the following requirements:

  1.

  AES 128-bit encryption

  2.

  SHA-1 hashing

  3.

  User access via SSL VPN

  4.

  PFS using DH Group 2

  5.

  Ability to maintain/rotate keys and passwords

  6.

  Certificate-based authentication

  Which solution should you recommend so that the organization meets the requirements?

  A. AWS hardware VPN between the virtual private gateway and customer gateway

  B. A third-party VPN solution deployed from AWS Marketplace

  C. A private MPLS solution from an international carrier

  D. AWS hardware VPN between the virtual private gateways in each region

  Correct Answer: D

• Question 408:

  You manage a web service that is used by client applications deployed in 300 offices worldwide. The web service architecture is an Elastic Load balancer (ELB) distributing traffic across four application servers deployed in an autoscaling group across two availability zones.

  The ELB is configured to use round robin, and sticky sessions are disabled. You have configured the NACLs and Security Groups to allow port 22 from your bastion host, and port 80 from 0.0.0.0/0. The client configuration is managed by each regional IT team.

  Upon inspection you find that a large amount of requests from incorrectly configured sites are causing a single application server to degrade. The remainder of the requests are equally distributed across all servers with no negative effects.

  What should you do to remedy the situation and prevent future occurrences?

  A. Mark the affected instance as degraded in the ELB and raise it with the client application team.

  B. Update the NACL to only allow port 80 to the application servers from the ELB servers.

  C. Update the Security Groups to only allow port 80 to the application servers from the ELB.

  D. Terminate the affected instance and allow Auto Scaling to create a new instance.

  Correct Answer: D

• Question 409:

  Your organization uses a VPN to connect to your VPC but must upgrade to a 1-G AWS Direct Connect connection for stability and performance. Your telecommunications provider has provisioned the circuit from your data center to an AWS Direct Connect facility and needs information on how to cross-connect (e.g., which rack/port to connect).

  What is the AWS-recommended procedure for providing this information?

  A. Create a support ticket. Provide your AWS account number and telecommunications company's name and where you need the Direct Connect connection to terminate.

  B. Create a new connection through your AWS Management Console and wait for an email from AWS with information.

  C. Ask your telecommunications provider to contact AWS through an AWS Partner Channel. Provide your AWS account number.

  D. Contact an AWS Account Manager and provide your AWS account number, telecommunications company's name, and where you need the Direct Connect connection to terminate.

  Correct Answer: A

• Question 410:

  Your company decides to use Amazon S3 to augment its on-premises data store. Instead of using the company's highly controlled, on-premises Internet gateway, a Direct Connect connection is ordered to provide high bandwidth, low latency access to S3. Since the company does not own a publically routable IPv4 address block, a request was made to AWS for an AWS-owned address for a Public Virtual Interface (VIF).

  The security team is calling this new connection a “backdoor”, and you have been asked to clarify the risk to the company.

  Which concern from the security team is valid and should be addressed?

  A. AWS advertises its aggregate routes to the Internet allowing anyone on the Internet to reach the router.

  B. Direct Connect customers with a Public VIF in the same region could directly reach the router.

  C. EC2 instances in the same region with access to the Internet could directly reach the router.

  D. The S3 service could reach the router through a pre-configured VPC Endpoint.

  Correct Answer: A