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| Section | Weight | Objectives |
|---|---|---|
| Security | 26% | - Data security
|
| Deployment | 24% | - Infrastructure as code
|
| Troubleshooting and Optimization | 18% | - Performance optimization
|
| Development with AWS Services | 32% | - Application development and integration
|
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NEW QUESTION # 440
A company built a new application in the AWS Cloud. The company automated the bootstrapping of new resources with an Auto Scaling group by using AWS Cloudf-ormation templates. The bootstrap scripts contain sensitive data.
The company needs a solution that is integrated with CloudFormation to manage the sensitive data in the bootstrap scripts.
Which solution will meet these requirements in the MOST secure way?
Answer: B
Explanation:
This solution meets the requirements in the most secure way because it uses a service that is integrated with CloudFormation to manage sensitive data in encrypted form. AWS Systems Manager Parameter Store provides secure, hierarchical storage for configuration data management and secrets management. You can store sensitive data as secure string parameters, which are encrypted using an AWS Key Management Service (AWS KMS) key of your choice. You can also use dynamic references in your CloudFormation templates to specify template values that are stored in Parameter Store or Secrets Manager without having to include them in your templates. Dynamic references are resolved only during stack creation or update operations, which reduces exposure risks for sensitive data. Putting sensitive data into a CloudFormation parameter will not encrypt them or protect them from unauthorized access. Putting sensitive data into an Amazon S3 bucket or Amazon Elastic File System (Amazon EFS) will require additional configuration and integration with CloudFormation and may not provide fine-grained access control or encryption for sensitive data.
NEW QUESTION # 441
A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from https://www.example.com. After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets.
To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.
What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?
Answer: B
Explanation:
Browsers enforce the Same-Origin Policy, which restricts web pages from requesting resources (like JavaScript files, fonts, and other assets) from a different domain/origin unless the target explicitly allows it.
When the developer moved shared JavaScript and web fonts into a separate "central" S3 bucket, the applications likely began fetching these assets from a different origin than the app's primary origin (for example, different domain, subdomain, or CloudFront distribution). As a result, the browser blocks those requests unless the response includes the appropriate CORS headers.
AWS documentation for Amazon S3 explains that to allow cross-origin requests from browsers, you must configure Cross-Origin Resource Sharing (CORS) on the S3 bucket that serves the resources. A CORS configuration defines allowed origins, methods (such as GET), and headers. For fonts in particular, browsers are strict and commonly require CORS headers to load fonts across origins.
Option C directly addresses this by adding a CORS policy to the central bucket, allowing the subsidiary application origins to retrieve JS and font files without being blocked.
Option B (bucket policy) controls authorization at the AWS request level, but it does not instruct browsers to allow cross-origin access. Even if the request is authorized, the browser can still block it if CORS headers are missing.
Option A (access points) is also about access management and does not solve browser CORS enforcement.
Option D (Content-MD5) is for integrity checking and is unrelated to cross-origin browser blocking.
NEW QUESTION # 442
A developer is deploying an application on Amazon EC2 instances that run in Account A. In certain cases, this application needs to read data from a private Amazon S3 bucket in Account B. The developer must provide the application access to the S3 bucket without exposing the S3 bucket to anyone else.
Which combination of actions should the developer take to meet these requirements? (Select TWO.)
Answer: C,D
Explanation:
This is a classic cross-account S3 access requirement: EC2 instances in Account A must read from a private S3 bucket in Account B without making the bucket public.
The correct pattern is to grant access using IAM + S3 bucket policy while keeping the bucket private. In Account B, you create an IAM role that has the necessary S3 read permissions (such as s3:GetObject and potentially s3:ListBucket depending on access needs). That is Option A.
However, permissions on the role alone are not sufficient, because the S3 bucket is in a different account and is private by default. AWS requires that the bucket owner explicitly grants access to the external principal.
This is done by adding a bucket policy in Account B that allows the principal (either the role in Account A or a role session via STS) to access the bucket objects. That is Option D.
Option B is not correct in the "select two" sense because adding permissions to Account A's instance profile role does not, by itself, grant access to a bucket owned by Account B. You still need the bucket policy or another resource-based policy from the bucket owner.
Option C violates the requirement ("without exposing the S3 bucket to anyone else"). Making the bucket public is unnecessary and insecure.
Option E is incorrect because a trust policy controls who can assume a role (sts:AssumeRole), not what S3 permissions the role has. Also, trust policies do not grant s3:Get* access.
Therefore, create an IAM role with S3 read permissions in Account B and grant access via the Account B bucket policy.
NEW QUESTION # 443
A developer is building an AWS SAM template for an application. The developer needs to configure values that change depending on the target AWS Region of the SAM template. The developer must configure resources in the template to exist depending on the target deployment application environment. Which solutions will meet these requirements? (Choose two.)
Answer: C,E
Explanation:
Use Mappings to define Region-specific values and retrieve them with Fn::FindInMap during deployment.
Use Conditions with Fn::Equals (typically against a parameter like EnvType) to control whether resources are created for a given environment.
NEW QUESTION # 444
A company has an Amazon S3 bucket that contains sensitive data. The data must be encrypted in transit and at rest. The company encrypts the data in the S3 bucket by using an AWS KMS key. A developer needs to grant several other AWS accounts the permission to use the S3 GetObject operation to retrieve the data from the S3 bucket.
How can the developer enforce that all requests to retrieve the data provide encryption in transit?
Answer: B
Explanation:
"Encryption in transit" for S3 means requiring requests to use HTTPS (TLS) rather than HTTP. AWS provides a standard policy condition key, aws:SecureTransport, that evaluates to true when the request is made over SSL/TLS and false when it is not. To enforce TLS for all cross-account GetObject requests, the most reliable control point is the S3 bucket resource-based policy, because the bucket is the resource being accessed and the bucket owner can enforce conditions regardless of which external account is calling.
Option A is the established pattern: add an explicit Deny statement in the bucket policy that denies all S3 actions (or at least s3:GetObject) when aws:SecureTransport is false. An explicit deny overrides any allows, ensuring that even if another account's IAM policy allows access, the request will still be blocked if it is not using HTTPS.
Option B is backwards because it would allow insecure transport rather than deny it.
Option C is weaker because you cannot reliably enforce policies in other accounts (and principals could change roles or permissions). The bucket owner should enforce transport security at the bucket level.
Option D is not the right layer: the KMS key policy controls key usage, but the S3 GetObject transport requirement is best enforced by the S3 bucket policy. Also, S3 access can be denied before KMS is even involved.
Therefore, enforce HTTPS by adding a bucket policy Deny when aws:SecureTransport is false.
NEW QUESTION # 445
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