CLF-C02 Cloud Concepts Practice Question
A developer needs to launch a test EC2 instance for a new prototype. The developer logs into the AWS Management Console, selects an instance type, and launches the instance without contacting AWS support or waiting for approval. Which cloud computing characteristic does this demonstrate?
⚠ Common exam trap
Many exam-takers confuse 'on-demand self-service' with 'broad network access' because both involve network-based interaction, but the key differentiator is the absence of human intervention in the provisioning process, not the method of access.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
On-demand self-service
The scenario describes a developer independently provisioning an EC2 instance through the AWS Management Console without requiring human interaction with AWS support. This directly aligns with the NIST definition of on-demand self-service, a core characteristic of cloud computing where users can unilaterally provision computing capabilities as needed automatically.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Broad network access
Why it's wrong here
Broad network access is a NIST essential characteristic that means cloud capabilities are available over the network through standard mechanisms, enabling access from heterogeneous client platforms such as laptops, phones, and tablets. While EC2 instances are indeed reachable remotely via SSH/HTTPS, this characteristic says nothing about a user's ability to trigger provisioning without human intervention. The action of launching an EC2 instance directly from the AWS Management Console is about self-service resource creation, not the breadth of network-based accessibility.
- ✓
On-demand self-service
Why this is correct
On-demand self-service is the NIST essential characteristic that allows a user to unilaterally provision computing capabilities, such as EC2 instances, automatically and without requiring human interaction with each service provider. In practice, this means a user can log in to the AWS Console or call the EC2 API and receive a running virtual server in minutes, with no need to submit a ticket or wait for approval from AWS support. This characteristic is the exact behavior described in the scenario: launching an EC2 instance is done by the consumer, on demand, with no manual provider intervention.
- ✗
Resource pooling
Why it's wrong here
Resource pooling is the provider-side NIST characteristic where computing resources are pooled to serve multiple consumers using a multi-tenant model, with physical and virtual resources dynamically assigned and reassigned according to demand. The customer does not generally know or control the exact location of the resources, though it may specify a higher-level abstraction such as an AWS Region or Availability Zone. The scenario's focus is on the customer's initiating action, not on how AWS aggregates and shares infrastructure behind the scenes, so resource pooling is not the characteristic being demonstrated.
- ✗
Measured service
Why it's wrong here
Measured service is the NIST characteristic where cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service, enabling pay-per-use billing and usage transparency for both provider and consumer. When a user launches an EC2 instance, AWS measures compute hours, storage, and network traffic, and these measurements drive billing. However, metering and billing provide only the feedback mechanism and cost model; they do not explain the self-provisioning action itself, which is the essence of the scenario.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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