Billing, Pricing, and Support — AWS Certified Cloud Practitioner

The official AWS documentation our Billing, Pricing, and Support practice questions are cited to. Review the primary sources, then practise.

Official references for this objective

Amazon Web Services — AWS Premium Support FAQs

Basic Support plan customers are restricted to customer support and service limit increase cases.
Amazon Web Services — Managing your costs with AWS Budgets - AWS Cost Management

you could automatically apply a custom IAM policy that denies you the ability to provision additional resources within an account
Amazon Web Services — Analyzing your costs and usage with AWS Cost Explorer - AWS Cost Management

forecast how much you're likely to spend for the next 18 months
Amazon Web Services — Select the best pricing model - Cost Optimization Pillar

On demand is also suitable for workloads, such as pre-production environments, which require uninterrupted runtimes, but do not run long enough for a commitment discount
Amazon Web Services — Consolidating billing for AWS Organizations - AWS Billing

No extra fee – Consolidated billing is offered at no additional cost.
Amazon Web Services — On-Demand Instances vs Reserved Instances - Instance Types Comparison - AWS

Convertible Reserved Instances can be exchanged for another Reserved Instance with new attributes, but cannot be bought and sold in the marketplace