By default, you can create up to 100 buckets.

The correct answer to this AWS interview question would be:

There is no hard limit on the number of S3 buckets that can be created within an AWS account. However, AWS recommends keeping the number of buckets to a reasonable level for organizational and management purposes. It’s crucial to design bucket structures that align with best practices for security, performance, and cost optimization. Additionally, AWS provides soft limits that can be increased by submitting a support request if necessary.