CLF-C02 Cloud Concepts Practice Test 6 — 15 Questions

Question 1

A startup is migrating its infrastructure to AWS. The CTO notices that the hourly rate for an Amazon EC2 instance is significantly lower than the cost of purchasing and maintaining a comparable physical server in their own data center. The CTO explains that AWS can offer lower prices because it aggregates demand from thousands of customers and optimizes its data center operations. Which benefit of cloud computing does this scenario primarily illustrate?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Economies of scale. The scenario describes AWS aggregating demand from thousands of customers to optimize data center operations, which directly reduces per-unit costs. This is the definition of economies of scale, where larger operational scale leads to lower average costs. The CTO's observation that the hourly EC2 rate is lower than purchasing a physical server illustrates how cloud providers pass these savings to customers.

Answer

High availability

Answer

Elasticity

Answer

Global reach

Question 2

A company runs a nightly batch processing job on AWS that takes exactly 2 hours to complete. The company uses a fixed set of Amazon EC2 instances for the job. AWS automatically tracks the number of instance-hours consumed each month and bills the company precisely for that usage. The company does not need to sign a long-term contract or pay for idle resources. Which essential characteristic of cloud computing does this scenario best illustrate?

Accepted Answer

Measured service. The scenario describes AWS automatically tracking and billing precisely for the number of instance-hours consumed each month, without requiring a long-term contract or payment for idle resources. This directly illustrates the 'measured service' characteristic, where cloud resource usage is metered, monitored, and reported transparently, enabling pay-as-you-go billing. The fixed 2-hour nightly job and exact billing per instance-hour confirm that usage is measured and charged accordingly.

Answer

Resource pooling

Answer

Rapid elasticity

Answer

Broad network access

Question 3

A gaming company wants to deploy its multiplayer game to players in North America, Europe, and Asia. The company needs to ensure that players in all three regions experience low latency when connecting to game servers, and the game servers must be located as close as possible to the players. The company chooses AWS to host the game servers. Which benefit of cloud computing does this scenario best illustrate?

Accepted Answer

Global reach – because AWS has regions around the world, allowing the company to deploy game servers geographically close to players.. This scenario best illustrates global reach because AWS operates multiple geographic regions worldwide, enabling the gaming company to deploy game servers in North America, Europe, and Asia. By placing infrastructure close to players, the company minimizes network latency and improves the real-time multiplayer experience. This is a core benefit of cloud computing that on-premises solutions cannot easily replicate without significant investment.

Answer

Rapid elasticity – because AWS can automatically scale the number of game servers based on player demand.

Answer

Pay-as-you-go – because the company only pays for game server compute hours used.

Answer

Resource pooling – because multiple players share the same underlying server resources.

Question 4

A company operates a social media analytics platform that runs on AWS. The platform experiences unpredictable traffic spikes during major events. The company wants to ensure that compute capacity automatically increases during these spikes without any manual intervention, and decreases when traffic subsides to avoid paying for idle resources. Which characteristic of cloud computing does this business requirement directly rely on?

Accepted Answer

Rapid elasticity. The requirement to automatically scale compute capacity up during traffic spikes and down when traffic subsides directly relies on rapid elasticity, a key characteristic of cloud computing defined by the NIST SP 800-145 standard. Rapid elasticity enables resources to be provisioned and released elastically, often automatically, to match demand at any scale, which is essential for handling unpredictable traffic on a social media analytics platform without manual intervention.

Answer

On-demand self-service

Answer

Broad network access

Answer

Resource pooling

Question 5

A company has employees in field offices who need to manage AWS resources (e.g., launch EC2 instances, upload files to S3) using a web browser on their company-issued laptops. The laptops connect to the internet via public Wi-Fi or cellular hotspots. The employees do not have any VPN or direct corporate network connection. They can successfully access the AWS Management Console and perform all actions over standard HTTPS ports. Which essential characteristic of cloud computing does this scenario primarily demonstrate?

Accepted Answer

Broad network access. This scenario demonstrates broad network access because the employees can access and manage AWS resources from anywhere using standard web browsers over HTTPS (port 443) on public Wi-Fi or cellular hotspots, without requiring a VPN or dedicated corporate network. Broad network access means that cloud resources are available over the network through standard mechanisms (e.g., web browsers, REST APIs) from heterogeneous client platforms (laptops, phones, tablets). The ability to perform all actions via the AWS Management Console over HTTPS directly illustrates this characteristic.

Answer

Resource pooling

Answer

Measured service

Answer

Rapid elasticity

Question 6

A company traditionally operated an on-premises data center and purchased all server hardware and software licenses with upfront capital expenditure. After migrating its workloads to AWS, the company now receives a monthly invoice that reflects only the compute hours, storage, and data transfer that it actually used. The company can also stop paying for resources when they are no longer needed. Which key characteristic of cloud computing does this scenario best illustrate?

Accepted Answer

Pay-as-you-go pricing (variable expense). The scenario describes a shift from upfront capital expenditure (buying hardware and licenses) to a model where the company pays only for the compute hours, storage, and data transfer it actually uses, and can stop paying when resources are no longer needed. This directly illustrates the pay-as-you-go pricing characteristic of cloud computing, where costs are variable expenses based on consumption rather than fixed, upfront investments. This model is a fundamental aspect of AWS's pricing philosophy, enabling customers to align costs directly with usage.

Answer

Elasticity

Answer

Global reach

Answer

Security

Question 7

A development team needs to provision a new Amazon EC2 instance for a proof-of-concept project. The team has an AWS account with appropriate IAM permissions. One developer logs into the AWS Management Console, selects an Amazon Machine Image (AMI), chooses an instance type, configures security groups, and launches the instance. The entire process takes less than 10 minutes and does not require any interaction with AWS support or IT administrators. Which essential characteristic of cloud computing does this scenario best illustrate?

Accepted Answer

On-demand self-service. This scenario best illustrates on-demand self-service because the developer was able to provision an EC2 instance entirely through the AWS Management Console without any human interaction with AWS support or IT administrators. The ability to independently configure and launch compute resources—selecting an AMI, instance type, and security groups—within minutes, without requiring manual approval or provisioning, is the defining characteristic of on-demand self-service as defined by NIST SP 800-145.

Answer

Resource pooling

Answer

Measured service

Answer

Broad network access

Question 8

A retail company runs its e-commerce platform on AWS. The platform uses multiple Amazon EC2 instances behind an Application Load Balancer. To ensure the application remains available during an Availability Zone failure, the company distributes the instances across three Availability Zones. The load balancer automatically reroutes traffic away from an unhealthy zone. This design primarily addresses which pillar of the AWS Well-Architected Framework?

Accepted Answer

Reliability. Distributing EC2 instances across multiple Availability Zones and using an Application Load Balancer to automatically reroute traffic away from unhealthy zones ensures that the application remains available even if an entire AZ fails. This design directly addresses the 'Reliability' pillar of the AWS Well-Architected Framework, which focuses on the ability of a workload to recover from infrastructure or service disruptions and dynamically acquire computing resources to meet demand.

Answer

Security

Answer

Performance Efficiency

Answer

Cost Optimization

Question 9

A company has deployed a web application on Amazon EC2 instances. The company's security team wants to ensure that the underlying host operating system is patched against a newly discovered vulnerability. According to the AWS Shared Responsibility Model, who is responsible for applying the patch to the host operating system?

Accepted Answer

AWS, because the hypervisor and host OS are part of the 'Security of the Cloud'.. Under the AWS Shared Responsibility Model, AWS is responsible for the security of the cloud, which includes the physical infrastructure, hypervisor, and host operating system that runs EC2 instances. When a vulnerability is discovered in the host OS (the OS that runs the hypervisor and manages the physical hardware), AWS must apply the patch because the customer has no access to or control over the host OS. The customer is only responsible for patching the guest OS (the OS running inside the EC2 instance) and any applications deployed on it.

Answer

The company, because patches for underlying infrastructure are always the customer's responsibility in EC2.

Answer

The company, because EC2 is an Infrastructure as a Service (IaaS) offering and the customer manages the OS.

Answer

Both the company and AWS share responsibility equally for host OS patching.

Question 10

A company runs a customer-facing web application on AWS. To ensure the application remains available if a fire or flood destroys one of the company's data centers, the IT team deploys the application across multiple physically separate facilities within the same AWS Region. Each facility has independent power, cooling, and physical security. Which component of the AWS global infrastructure does this deployment strategy primarily use?

Accepted Answer

Availability Zones. Availability Zones are distinct, physically separated locations within an AWS Region, each with independent power, cooling, and physical security. Deploying across multiple Availability Zones protects against data center-level failures like fires or floods, ensuring high availability for the application.

Answer

AWS Regions

Answer

Edge Locations

Answer

Local Zones

Question 11

A gaming company launches a new online multiplayer game. During peak hours (evenings and weekends), the player count spikes dramatically, requiring dozens of Amazon EC2 instances to handle the load. During off-peak hours, the player count drops to near zero. The company configures an Amazon EC2 Auto Scaling group that automatically adds instances when CPU utilization exceeds 70% and removes instances when utilization drops below 30%. Which characteristic of cloud computing does this configuration best demonstrate?

Accepted Answer

Elasticity. Elasticity is the ability of a cloud system to automatically scale resources up or down based on demand. In this scenario, the Auto Scaling group dynamically adds EC2 instances when CPU utilization exceeds 70% and removes them when it drops below 30%, directly matching the fluctuating player load. This demonstrates elasticity because resources are provisioned and de-provisioned in real-time to match the exact workload, minimizing cost during low usage and ensuring performance during spikes.

Answer

High availability

Answer

Fault tolerance

Answer

Global reach

Question 12

A company runs an e-commerce platform on AWS. The platform experiences unpredictable traffic, with occasional large spikes. The company wants to automatically adjust compute capacity to match demand exactly, ensuring consistent performance while only paying for the resources consumed. Which benefit of the AWS Cloud does this scenario primarily describe?

Accepted Answer

Elasticity. Elasticity is the ability of AWS to automatically scale compute resources up or down based on demand. In this scenario, the e-commerce platform experiences unpredictable traffic spikes, and elasticity ensures that EC2 instances or Auto Scaling groups adjust capacity in real time, matching demand exactly while only charging for resources consumed. This directly aligns with the 'pay-as-you-grow' model and the operational benefit of scaling without manual intervention.

Answer

High availability

Answer

Disaster recovery

Answer

Resource pooling

Question 13

A company wants to deliver its web application content to users across North America, Europe, and Asia with minimal latency. The application runs on Amazon EC2 instances and serves static and dynamic content. Which AWS Cloud concept is most directly supported by using AWS Regions and edge locations to meet this requirement?

Accepted Answer

Global reach. AWS Regions and edge locations are geographically distributed infrastructure components that enable global reach. By deploying the application in multiple Regions (e.g., us-east-1, eu-west-1, ap-southeast-1) and using edge locations via Amazon CloudFront, the company can serve static and dynamic content from locations closer to users, reducing latency across North America, Europe, and Asia. This directly supports the concept of global reach, which is the ability to serve a worldwide user base with low latency.

Answer

High availability

Answer

Elasticity

Answer

Fault tolerance

Question 14

A company operates its own data center with physical servers that are purchased outright every three years. The company is migrating its entire infrastructure to AWS. The CFO notes that the company will no longer need to make large upfront purchases of hardware and instead will pay monthly for the compute and storage resources used. Which cloud computing benefit does this scenario best illustrate?

Accepted Answer

Shifting capital expense to variable operational expense. This scenario illustrates the shift from capital expenditure (CapEx) to variable operational expenditure (OpEx). In the on-premises model, the company makes large upfront purchases of physical servers every three years, which is a capital expense. By migrating to AWS, the company pays only for the compute and storage resources it consumes on a monthly basis, converting that fixed, upfront cost into a variable operating cost that scales with usage.

Answer

High availability

Answer

Resource elasticity

Answer

Security compliance

Question 15

A financial services company keeps sensitive customer data in an on-premises data center. Regulatory requirements prohibit this data from being stored in the cloud. However, the company needs to run compute-intensive analytics jobs that periodically require more processing power than its on-premises servers can provide. The company wants to use AWS for these burst capacity needs while keeping the sensitive data on premises. Which cloud deployment model best describes this approach?

Accepted Answer

Hybrid cloud. The hybrid cloud model is correct because it combines on-premises infrastructure (private cloud) with public cloud resources (AWS) while keeping sensitive data on-premises. The company uses AWS for burst compute capacity via services like AWS Batch or EC2 Auto Scaling, but the data never leaves the on-premises data center, satisfying regulatory requirements.

Answer

Public cloud

Answer

Private cloud

Answer

Community cloud