Examkin

Question

Difficulty: EasyAWS Pricing Models

A company needs to host a production web application on Amazon EC2 that experiences sudden, unpredictable spikes in traffic. The application must remain continuously available, and the company wants to avoid any long-term contracts or upfront payments. Which Amazon EC2 pricing model should the company use for this workload?

  1. On-Demand InstancesAnswer
  2. B
    Spot Instances
  3. C
    Reserved Instances
  4. D
    Savings Plans

Answer

On-Demand Instances
On-Demand Instances are the correct choice because they offer maximum flexibility without any long-term contract, upfront payment, or risk of interruption. This matches the requirements of a production web application with unpredictable spikes that must remain continuously online.

Step-by-Step Solution

1
Analyze the workload requirements: the application has unpredictable traffic spikes, must remain continuously available (no interruptions), and the customer wants to avoid long-term contracts or commitments.
Identified that Spot Instances are ruled out due to potential interruptions, and Reserved Instances or Savings Plans are ruled out due to the long-term commitment requirement.
We must match the specific workload characteristics to the appropriate AWS pricing model constraints.
2
Identify the EC2 pricing model that offers no commitment, continuous availability, and accommodates unpredictable traffic spikes.
On-Demand Instances fit these criteria perfectly, allowing the user to pay only for the compute capacity consumed with no upfront costs.
On-Demand pricing is designed for flexible, short-term, or unpredictable workloads that cannot be interrupted.

Key Concept

Selecting the appropriate Amazon EC2 pricing model based on workload characteristics (predictability, duration, and fault tolerance).
Estimated Time:45s
Rate this question

Topics

AWS Pricing Models

More questions from this topic