AWS SAP-C01 Sample Questions and Answers with Explanations

Question: 1. An enterprise has a large number of AWS accounts owned by separate business groups. One of the accounts was recently compromised. The attacker launched a large number of instances, resulting in a high bill for that account. The security breach was addressed, but management has asked a solutions architect to develop a solution to prevent excessive spending in all accounts. Each business group wants to retain full control over its AWS account. Which solution should the solutions architect recommend to meet these requirements?

Answer: C) Enable billing alerts on each AWS account. Create Amazon CloudWatch alarms that send an Amazon SNS notification to the account administrator whenever their account exceeds the spending budget.

Explanation: C – Billing alarms will allow management to get alerted on excessive spend without taking control away from any of the business groups. A and B are incorrect because each business group wants to retain control of their account, and these solutions would not protect against launching a large number of instances. D is a manual process, and it could be a while before any unauthorized spend is discovered.

Question: 2. A company has multiple AWS accounts. The company has integrated its on-premises Active Directory with AWS SSO to grant Active Directory users least privilege abilities to manage infrastructure across all
the accounts. A solutions architect must integrate a third-party monitoring solution that requires read-only access across all AWS accounts. The monitoring solution will run in its own AWS account. How can the monitoring solution be given the required permissions?

Answer: D) Create an AWS CloudFormation template that defines a new IAM role for the third-party monitoring solution with the account of the third party listed in the trust policy. Create the IAM role across all linked
AWS accounts by using a stack set.

Explanation: D – AWS CloudFormation StackSets can deploy the IAM role across multiple accounts with a single operation. A is incorrect because credentials supplied by AWS SSO are temporary, so the application would lose permissions and have to log in again. B would grant access to the master account only. C is incorrect because accounts belonging to an organization do not receive permissions in the other accounts.

Question: 3) A team is building an HTML form hosted in a public Amazon S3 bucket. The form uses JavaScript to post data to an Amazon API Gateway endpoint. The endpoint is integrated with AWS Lambda functions. The team has tested each method in the API Gateway console and received valid responses. Which combination of steps must be completed for the form to successfully post to the API Gateway and receive a valid response? (Select TWO.)

Answer: D) Enable cross-origin resource sharing (CORS) in API Gateway.
E) Configure the S3 bucket for web hosting.

Explanation: D, E – CORS must be enabled to keep the browser from generating an error due to the same origin policy, which requires that the dynamic content should come from the same domain as the static content. Since API Gateway is using a domain of the form [restapi-id].execute-api.amazonaws.com, and the S3 bucket uses [bucketname].s3.website-[region].amazonaws.com, a CORS header must be sent with the API Gateway response for the browser to relax the restriction. E is required for the HTML form to be served usinga website endpoint. A is incorrect because the CORS header must be configured to be returned by the dynamic response from the API endpoint. Configuring CORS for the S3 bucket does not help. B is incorrect because there is no advantage to serving a static webpage from a web server running on EC2 versus an S3 bucket. C is incorrect because API Gateway has a default per AWS Region limit of 10,000 requests per second. If required for production, this limit can be increased.

Question: A retail company runs a serverless mobile app built on Amazon API Gateway, AWS Lambda, Amazon Cognito, and Amazon DynamoDB. During heavy holiday traffic spikes, the company receives complaints
of intermittent system failures. Developers find that the API Gateway endpoint is returning 502 Bad Gateway errors to seemingly valid requests.
Which method should address this issue?

Answer: A) Increase the concurrency limit for Lambda functions and configure notification alerts to be sent by Amazon CloudWatch when the ConcurrentExecutions metric approaches the limit.

Explanation: A – The 502 internal server errors will be returned intermittently by API Gateway if the Lambda function exceeds concurrency limits. B is incorrect because, in this case, API Gateway would return a 429 error for too many requests. C is incorrect because the error occurs when calling the API Gateway endpoint, not during the authentication process. D is incorrect because stale data would not cause a bad gateway error.

Question: 5) A web hosting company has enabled Amazon GuardDuty in every AWS Region for all of its accounts. A system administrator must create an automated response to high-severity events. How should this be accomplished?

Answer: B) Create an Amazon CloudWatch Events rule that triggers an AWS Lambda function that programmaticallyaddresses the issue.

Explanation: B – GuardDuty findings can be sent to Amazon SNS topics and CloudWatch Events. Neither VPC Flow Logs nor AWS CloudTrail can trigger a Lambda function. Trusted Advisor is a recommendation service, and is not suited for this scenario.

Question: 6) A company is launching a new web service on an Amazon ECS cluster. Company policy requires that the security group on the cluster instances block all inbound traffic but HTTPS (port 443). The cluster consists of 100 Amazon EC2 instances. Security engineers are responsible for managing and updating the cluster instances. The security engineering team is small, so any management efforts must be minimized. How can the service be designed to meet these operational requirements?

Answer: C) Launch the cluster instances with no SSH key pairs. Use the Amazon Systems Manager Run Command to remotely manage the cluster instances.

Explanation: C – The Systems Manager Run Command requires no inbound ports to be open; it operates entirely over outbound HTTPS (which is open by default for security groups). A and B are ruled out because the requirements clearly state that the only inbound port to be open is 443. D is ruled out because Trusted Advisor does perform management functions.

Question: 7) A company has two AWS accounts: one for production workloads and one for development workloads. Creating and managing these workloads are a development team and an operations team. The company needs a security strategy that meets the following requirements:

  • Developers need to create and delete development application infrastructure.
  • Operators need to create and delete both development and production application infrastructure.
  • Developers should have no access to production infrastructure.
  • All users should have a single set of AWS credentials.

Answer: D) In the development account:

  • Create a development IAM group with the ability to create and delete application infrastructure.
  •  Create an operations IAM group with the ability to assume the shared role in the production account.
  •  Create an IAM user for each developer and assign them to the development group.
  •  Create an IAM user for each operator and assign them to the development group and the operations group.

In the production account:

  •  Create a shared IAM role with the ability to create and delete application infrastructure.
  •  Add the development account to the trust policy for the shared role.

Explanation: D – This is the only response that will work and meets the requirements. It follows the standard guidelines for granting cross-account access between two accounts that you control. A requires two sets of credentials for operators, which breaks the requirements. B will not work, as an IAM user cannot be added to an IAM group in a different account. C will not work, as a role cannot grant access to resources in another account; the shared role must be in the account with resources it manages.

Question: 8) A company is migrating an Apache Hadoop cluster from its data center to AWS. The cluster consists of 60 VMware Linux virtual machines (VMs). During the migration cluster, downtime should be minimized. Which process will minimize downtime?

Answer: B) Use AWS Server Migration Service (AWS SMS) to migrate the VMs to AWS as AMIs. Launch the cluster on AWS as Amazon EC2 instances from the migrated AMIs.

Explanation: B – AWS SMS uploads each VM incrementally, so it can upload the servers while the data center cluster is still running. The data center cluster must be shut down prior to the final incremental sync of all the VMs only.

Question: 9) A solutions architect needs to reduce costs for a big data application. The application environment consists of hundreds of devices that send events to Amazon Kinesis Data Streams. The device ID is used as the partition key, so each device gets a separate shard. Each device sends between 50 KB and 450 KB of data per second. The shards are polled by an AWS Lambda function that processes the data and stores the result on Amazon S3. Every hour, an AWS Lambda function runs an Amazon Athena query against the result data that identifies any outliers and places them in an Amazon SQS queue. An Amazon EC2 Auto Scaling group of two EC2 instances monitors the queue and runs a short (approximately 30-second) process to address the outliers. The devices submit an average of 10 outlying values every hour. Which combination of changes to the application would MOST reduce costs? (Select TWO.)

Answer: B) Replace the Auto Scaling group with an AWS Lambda function triggered by messages arriving in the Amazon SQS queue.

D) Reconfigure the devices and data stream to set a ratio of 2 devices to 1 data stream shard.

Explanation: B, D – The average amount of compute used each hour is about 300 seconds (10 events x 30 seconds). While A and E would both reduce costs, they both involve paying for one or more EC2 instances sitting unused for 3,300 or more seconds per hour. B involves paying for the small amount of compute time required to process the outlying values only. Both C and D reduce the shard hour costs of the Kinesis data stream, but C will not work because the amount of data would exceed the 1 MBps limit of a single shard.

Question: 10) A company operates an ecommerce application on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Amazon EC2 Auto Scaling group across multiple Availability Zones. After an order is successfully processed, the application immediately posts order data to an external third-party affiliate tracking system that pays sales commissions for order referrals. During a highly successful marketing promotion, the number of EC2 instances increased from 2 to 20. The application continued to work correctly, but the increased request rate overwhelmed the third-party affiliate and resulted in failed requests. Which combination of architectural changes could ensure that the entire process functions correctly under load? (Select TWO.)

Answer: B) Move the code that calls the affiliate to a new AWS Lambda function. Modify the application to place the order data in an Amazon SQS queue. Trigger the Lambda function from the queue.

D) Adjust the concurrency limit of the new AWS Lambda function.

Explanation: B, D – Putting the messages in a queue (B) will decouple the main application from calls to the affiliate. That will not only protect the main application from the reduced capacity of the affiliate, it will also allow failed requests to automatically go back to the queue. Limiting number of concurrent executions (D) will prevent overwhelming the affiliate application. A is incorrect because, while asynchronously invoking the Lambda function will reduce load on the EC2 instances, it will not lower the number of requests to the affiliate application. C is incorrect because, while it will allow the Lambda function to wait longer for the external call to return, it does not reduce the load on the affiliate application (which will still be overwhelmed). E is incorrect because adjusting the memory will have no effect on the interaction between the Lambda function and the affiliate application.

Reference:

AWS. (2020). Solutions Architect – Professional (SAP-C01) Sample Exam Questions. AWS Training and Certification. d1.awsstatic.com/training-and-certification/docs-sa-pro/AWS-Certified-Solutions-Architect-Professional_Sample-Questions.pdf

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