Amazon SCS-C03 Practice Questions

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Question 11

A business wishes to install a three-tier web application using Amazon EC2 instances. These EC2 instances need access to credentials for authenticating SQL connections to an Amazon RDS database instance. Additionally, AWS Lambda functions must execute queries against the RDS database using the same database credentials as the RDS database. The credentials must be kept so that they can be accessed by the EC2 instances and Lambda functions. Other access is not permitted. The access logs must document when and by whom the credentials were accessed.

What actions should the Security Engineer take to ensure compliance with these requirements?

A. Store the database credentials in AWS Key Management Service (AWS KMS). Create an IAM role with access to AWS KMS by using the EC2 and Lambda service principals in the role's trust policy. Add the role to an EC2 instance profile. Attach the instance profile to the EC2 instances. Set up Lambda to use the new role for execution.

B. Store the database credentials in AWS KMS. Create an IAM role with access to KMS by using the EC2 and Lambda service principals in the role's trust policy. Add the role to an EC2 instance profile. Attach the instance profile to the EC2 instances and the Lambda function.

C. Store the database credentials in AWS Secrets Manager. Create an IAM role with access to Secrets Manager by using the EC2 and Lambda service principals in the role's trust policy. Add the role to an EC2 instance profile. Attach the instance profile to the EC2 instances and the Lambda function.

D. Store the database credentials in AWS Secrets Manager. Create an IAM role with access to Secrets Manager by using the EC2 and Lambda service principals in the role's trust policy. Add the role to an EC2 instance profile. Attach the instance profile to the EC2 instances. Set up Lambda to use the new role for execution.

Question 12

A business uses imported key materials to create a customer master key (CMK). All encryption keys must be rotated annually per company policy.

What steps may be taken to execute the aforementioned policy?

A. Enable automatic key rotation annually for the CMK.

B. Use AWS Command Line Interface to create an AWS Lambda function to rotate the existing CMK annually.

C. Import new key material to the existing CMK and manually rotate the CMK.

D. Create a new CMK, import new key material to it, and point the key alias to the new CMK.

Question 13

A water utility firm use several Amazon EC2 instances to administer updates to a fleet of 2,000 Internet of Things (IoT) field sensors used to check water quality. Each of these devices has its own set of access credentials.

A policy governing operational safety demands that access to particular credentials be auditable independently.

What is the MOST cost-effective method of managing credential storage?

A. Use AWS Systems Manager to store the credentials as Secure Strings Parameters. Secure by using an AWS KMS key.

B. Use AWS Key Management System to store a master key, which is used to encrypt the credentials. The encrypted credentials are stored in an Amazon RDS instance.

C. Use AWS Secrets Manager to store the credentials.

D. Store the credentials in a JSON file on Amazon S3 with server-side encryption.

Question 14

Amazon CloudWatch Logs is being used by a company with agents installed on its Linux Amazon EC2 instances. The agent configuration files have been verified, as have the application log files to be pushed. A review determined that particular instance-level logging is missing.

Which troubleshooting measures should be taken? (Select two.)

Select all that apply

A. Use an EC2 run command to confirm that the "awslogs" service is running on all instances.

B. Verify that the permissions used by the agent allow creation of log groups/streams and to put log events.

C. Check whether any application log entries were rejected because of invalid time stamps by reviewing /var/cwlogs/rejects.log.

D. Check that the trust relationship grants the service "cwlogs.amazonaws.com" permission to write objects to the Amazon S3 staging bucket.

E. Verify that the time zone on the application servers is in UTC.

Question 15

In the event of a security issue, a security engineer must create a system that allows the incident Response team to audit for modifications to a user's IAM rights.

How is this possible?

A. Use AWS Config to review the IAM policy assigned to users before and after the incident.

B. Run the GenerateCredentialReport via the AWS CLI, and copy the output to Amazon S3 daily for auditing purposes.

C. Copy AWS CloudFormation templates to S3, and audit for changes from the template.

D. Use Amazon EC2 Systems Manager to deploy images, and review AWS CloudTrail logs for changes.

Question 16

A business's connection policies are complicated, managing entrance, egress, and communication between Amazon EC2 instances. The rules are too complicated to implement within the maximum number of security groups and network access control lists (network ACLs).

Which technique will enable the organization to apply all necessary network regulations at no extra cost?

A. Configure AWS WAF rules to implement the required rules.

B. Use the operating system built-in, host-based firewall to implement the required rules.

C. Use a NAT gateway to control ingress and egress according to the requirements.

D. Launch an EC2-based firewall product from the AWS Marketplace, and implement the required rules in that product.

Question 17

An IAM user with fill EC2 permissions could bot start an Amazon EC2 instance after it was stopped for a maintenance task. Upon starting the instance, the instance state would change to "Pending", but after a few seconds, it would switch back to "Stopped".

An inspection revealed that the instance has attached Amazon EBS volumes that were encrypted by using a Customer Master Key (CMK). When these encrypted volumes were detached, the IAM user was able to start the EC2 instances.

The IAM user policy is as follows:

What additional items need to be added to the IAM user policy? (Choose two.)

Select all that apply

A. kms:GenerateDataKey

B. kms:Decrypt

C. kms:CreateGrant

D. "Condition": { "Bool": { "kms:ViaService" : "ec2.us-west-2.amazonaws.com" } }

E. "Condition": { "Bool": { "kms:GrantIsForAWSResource": true } }

Question 18

A Security Administrator has a website hosted in Amazon S3. The Administrator has been given the following requirements:

- Users may access the website by using an Amazon CloudFront distribution.

- Users may not access the website directly by using an Amazon S3 URL.

Which configurations will support these requirements? (Choose two.)

Select all that apply

A. Associate an origin access identity with the CloudFront distribution.

B. Implement a "Principal":"cloudfront.amazonaws.com" condition in the S3 bucket policy.

C. Modify the S3 bucket permissions so that only the origin access identity can access the bucket contents.

D. Implement security groups so that the S3 bucket can be accessed only by using the intended CloudFront distribution.

E. Configure the S3 bucket policy so that it is accessible only through VPC endpoints, and place the CloudFront distribution into the specified VPC.

Question 19

A Security Engineer has created an Amazon CloudWatch event that invokes an AWS Lambda function daily. The Lambda function runs an Amazon Athena query that checks AWS CloudTrail logs in Amazon S3 to detect whether any IAM user accounts or credentials have been created in the past 30 days. The results of the

Athena query are created in the same S3 bucket. The Engineer runs a test execution of the Lambda function via the AWS Console, and the function runs successfully.

After several minutes, the Engineer finds that his Athena query has failed with the error message: ג€Insufficient Permissionsג€. The IAM permissions of the Security

Engineer and the Lambda function are shown below:

Security Engineer -

Lambda function execution role -

What is causing the error?

A. The Lambda function does not have permissions to start the Athena query execution.

B. The Security Engineer does not have permissions to start the Athena query execution.

C. The Athena service does not support invocation through Lambda.

D. The Lambda function does not have permissions to access the CloudTrail S3 bucket.

Question 20

A business needs the inspection of IP packet data for invalid or harmful information.

Which of the following strategies satisfies this criterion? (Select two.)

Select all that apply

A. Configure a proxy solution on Amazon EC2 and route all outbound VPC traffic through it. Perform inspection within proxy software on the EC2 instance.

B. Configure the host-based agent on each EC2 instance within the VPC. Perform inspection within the host-based agent.

C. Enable VPC Flow Logs for all subnets in the VPC. Perform inspection from the Flow Log data within Amazon CloudWatch Logs.

D. Configure Elastic Load Balancing (ELB) access logs. Perform inspection from the log data within the ELB access log files.

E. Configure the CloudWatch Logs agent on each EC2 instance within the VPC. Perform inspection from the log data within CloudWatch Logs.

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