Which of the following could be the cause of this problem?

A SysOps administrator needs to give users the ability to upload objects to an Amazon S3 bucket. The SysOps administrator creates a presigned URL and provides the URL to a user, but the user cannot upload an object to the S3 bucket. The presigned URL has not expired, and no bucket policy is applied to the S3 bucket.

Which of the following could be the cause of this problem?
A . The user has not properly configured the AWS CLI with their access key and secret access key.
B . The SysOps administrator does not have the necessary permissions to upload the object to the S3 bucket.
C . The SysOps administrator must apply a bucket policy to the S3 bucket to allow the user to upload the object.
D . The object already has been uploaded through the use of the presigned URL, so the presigned URL is no longer valid.

View Answer

Answer: B

Explanation:

Step-by-Step

Understand the Problem:

A user cannot upload an object to an S3 bucket using a presigned URL, even though the URL is valid and the bucket has no policy applied.

Analyze the Requirements:

Determine the cause of the issue preventing the upload via the presigned URL.

Evaluate the Options:

Option A: The user has not properly configured the AWS CLI.

CLI configuration is not relevant to using a presigned URL.

Option B: The SysOps administrator does not have the necessary permissions.

The administrator’s permissions are required to generate a valid presigned URL with sufficient permissions.

Option C: A bucket policy is required.

A bucket policy is not necessary if the presigned URL has the correct permissions.

Option D: The object has already been uploaded.

A presigned URL remains valid until it expires or the specified permissions are revoked.

Select the Best Solution:

Option B: Ensuring that the SysOps administrator has the necessary permissions to upload objects to the S3 bucket is crucial for generating valid presigned URLs.

Reference: Amazon S3 Presigned URLs

IAM Policies for Amazon S3

The SysOps administrator must have the necessary permissions to upload objects to the S3 bucket, ensuring that the presigned URL generated allows the user to upload successfully.