Question 35
Domain 4: Design Cost-Optimized ArchitecturesSebuah perusahaan ingin menganalisis **pola penggunaan EC2** mereka selama 3 bulan terakhir untuk menentukan apakah Reserved Instances atau Savings Plans akan menghemat biaya. Mereka butuh rekomendasi spesifik dari AWS. Tools mana yang paling tepat?
Correct answer: D
Explanation
AWS Cost Explorer is the tool for reviewing historical EC2 usage and getting purchase guidance. AWS says Savings Plans recommendations use “7, 30, or 60 days” of historical usage and recommend “Compute Savings Plans or EC2 Instance Savings Plans” with projected savings, commitment amount, and term.
Why each option is right or wrong
A. AWS Trusted Advisor — cek apakah ada resources yang under-utilized
B. AWS Cost Explorer RI recommendations — analisis historical usage dan rekomendasikan RI yang optimal
C. AWS Compute Optimizer — rekomendasikan right-sizing instance
D. **AWS Cost Explorer dengan Savings Plans recommendations** — analisis 7, 30, atau 60 hari historical usage; rekomendasikan Compute Savings Plans atau EC2 Instance Savings Plans dengan projected savings; pilih commitment amount dan term yang sesuai
AWS Cost Explorer is the service that provides historical usage analysis and purchase guidance for EC2 commitments; its Savings Plans recommendations are based on 7, 30, or 60 days of past usage and show projected savings plus the recommended commitment amount and term. Under the AWS Cost Explorer recommendations feature, the output can specifically point to Compute Savings Plans or EC2 Instance Savings Plans, which is exactly what is needed to compare commitment-based discounts against the last 3 months of EC2 consumption.