What it is: The main ways AWS charges for resource usage.

What it’s for:

• Choose the best cost model for your workload pattern.
• Balance flexibility vs discount.

Key ideas:

• Common models:
  • On-Demand
  • Reserved Instances (RI)
  • Savings Plans
  • Spot Instances
  • Free Tier

Exam cues:

• “predictable steady workload, want discount” → RI or Savings Plans.
• “interruptible batch jobs, cheapest” → Spot.

Hard words (English + IPA + Vietnamese meaning):

• *pricing* /ˈpraɪsɪŋ/: định giá
• *flexibility* /ˌfleksəˈbɪləti/: linh hoạt
• *predictable* /prɪˈdɪktəbl/: có thể dự đoán
• *discount* /ˈdɪskaʊnt/: giảm giá