[Solved] A company runs a critical web application that must be available 24/7 with predictable costs.... Which EC2 pricing model should they choose and why? | AWS

AWS - EC2 Fundamentals

A company runs a critical web application that must be available 24/7 with predictable costs. They also want to reduce expenses by committing to usage. Which EC2 pricing model should they choose and why?

ASpot instances, because they are cheapest and can be interrupted

BOn-demand instances, because they have no commitment and flexible pricing

CReserved instances, because they offer cost savings with a commitment and stable availability

DDedicated hosts, because they provide physical isolation

Step-by-Step Solution

Solution:

Step 1: Analyze availability and cost needs
Critical 24/7 apps need stable availability and predictable costs.
Step 2: Match pricing models to needs
Reserved instances provide cost savings with 1 or 3 year commitment and stable availability; Spot can be interrupted; On-demand is flexible but more costly.
Final Answer:
Reserved instances, because they offer cost savings with a commitment and stable availability -> Option C
Quick Check:
Critical + savings + commitment = Reserved [OK]

Quick Trick: Stable + savings + commitment = Reserved instances [OK]

Common Mistakes:

Choosing Spot for critical apps despite interruptions
Picking On-demand for cost savings
Confusing Dedicated hosts with pricing benefits

Master "EC2 Fundamentals" in AWS

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

More AWS Quizzes

Which EC2 pricing model should they choose and why?

Step 1: Analyze availability and cost needs

Step 2: Match pricing models to needs

Final Answer:

Quick Check:

Want More Practice?