Pricing models, Savings Plans, S3 storage classes and lifecycle rules, data transfer costs, rightsizing and cost tools.
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- What is the primary benefit of EC2 Reserved Instances?
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Up to 72% discount compared to On-Demand pricing.- How much discount do Spot Instances provide versus On-Demand?
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Up to 90% discount, but instances can be interrupted with a 2-minute warning.- What is a Savings Plan?
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A flexible pricing model offering hourly discounts in exchange for a 1 or 3-year commitment.- How do Savings Plans differ from Reserved Instances?
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Savings Plans work across instance families and regions, while RIs are limited to specific configurations.- When should you use On-Demand EC2 instances?
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When you have unpredictable workloads or short-term, non-critical applications.- What are Capacity Reservations used for?
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To reserve compute capacity in a specific Availability Zone without a pricing discount.- What is S3 Standard storage class best for?
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Frequently accessed data requiring low latency and high throughput.- What does S3 Intelligent-Tiering do?
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Automatically moves objects between access tiers based on usage patterns to optimize costs.- When is S3 Standard-IA appropriate?
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For infrequently accessed data that requires rapid retrieval when needed.- What is the retrieval time for S3 Glacier Instant Retrieval?
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Milliseconds, ideal for data accessed once per quarter.- What retrieval time does S3 Glacier Flexible Retrieval offer?
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Minutes to hours, depending on the retrieval option chosen.- When should you use S3 Deep Archive?
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For archival data accessed rarely, with retrieval times of 12 hours or days.- What is an S3 lifecycle rule?
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An automated policy that transitions or expires objects based on age or other criteria.- Can lifecycle rules transition objects directly from S3 Standard to Glacier Deep Archive?
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No, objects must transition through intermediate storage classes first.- What does S3 Storage Class Analysis help with?
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It analyzes storage usage patterns to recommend optimal storage classes for cost reduction.
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