CLF-C02 Cloud Concepts Practice Test 4 — 15 Questions

Question 1

A retail company is migrating its e-commerce platform to AWS. The company's financial controller notes that AWS can offer lower pay-as-you-go prices than what it would cost the company to build and operate its own data center at the same scale. Which cloud computing concept best explains this pricing advantage?

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

Accepted Answer

Economies of scale. Economies of scale. AWS operates at a massive global scale, allowing it to negotiate lower prices for hardware, data center power, and network bandwidth. These savings are passed on to customers as lower pay-as-you-go prices, which a single company building its own data center cannot match due to its smaller procurement volume.

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Agility

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Elasticity

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High availability

Question 2

A startup company is evaluating the benefits of migrating to AWS. The CEO wants to experiment with a new application idea by quickly launching a small server, testing the application for a few days, and then decommissioning it. The company does not want to go through a lengthy procurement process to purchase hardware. Which cloud computing concept does this scenario best demonstrate?

Accepted Answer

Agility. The scenario describes the ability to rapidly provision a small server, test an application for a few days, and then decommission it without the delay of hardware procurement. This directly demonstrates agility, which in cloud computing refers to the speed and ease with which resources can be deployed, modified, and removed to respond to changing business needs. AWS services like EC2 allow instances to be launched in minutes via the AWS Management Console, CLI, or SDK, and terminated just as quickly, bypassing traditional hardware acquisition cycles.

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Elasticity

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High availability

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Pay-as-you-go

Question 3

A company is migrating a legacy monolithic e-commerce application to AWS. The application has three tightly integrated modules: user authentication, payment processing, and inventory management. In the current design, a failure in the payment processing module often causes the entire application to crash. The company wants to redesign the application so that each module runs independently, and a failure in one module does not cascade to other modules. Which cloud computing concept should the company apply to achieve this goal?

Accepted Answer

Loose coupling. Loose coupling. Loose coupling is a cloud computing concept where components are designed to have minimal dependencies on each other, communicating through well-defined interfaces or APIs. By decoupling the user authentication, payment processing, and inventory management modules, a failure in one module (e.g., payment processing) will not cascade and crash the entire application, as each module can operate independently and handle its own failures gracefully.

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Elasticity

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High availability

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Disaster recovery

Question 4

A financial institution has regulatory requirements to store sensitive customer data on-premises in its own data center. However, it wants to use AWS for compute-intensive analytics that need to access this data. The company plans to establish a dedicated, encrypted network connection between its data center and AWS. Which cloud deployment model does this scenario describe?

Accepted Answer

Hybrid cloud. This scenario describes a hybrid cloud deployment model because it combines on-premises infrastructure (the financial institution's own data center for storing sensitive customer data) with AWS public cloud resources (for compute-intensive analytics). The dedicated, encrypted network connection (such as AWS Direct Connect with IPSec or a VPN) securely bridges the two environments, allowing data to be accessed from AWS without being stored there, which meets regulatory requirements. Hybrid cloud is defined as a mixed computing environment where on-premises and public cloud resources are orchestrated together, often via a private network link.

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Public cloud

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Private cloud

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Multi-cloud

Question 5

A social media company hosts a web application on AWS that serves millions of users worldwide. The application delivers static content such as images, videos, and CSS files. To improve load times for users in different geographic regions, the company wants to cache this content at AWS locations that are as close to end users as possible. Which component of the AWS global infrastructure should the company use?

Accepted Answer

Edge Locations. Edge Locations are part of the AWS CloudFront content delivery network (CDN) and are specifically designed to cache static content (e.g., images, videos, CSS) at geographically dispersed points of presence (PoPs) close to end users. This reduces latency by serving content from the nearest edge location rather than the origin server, directly addressing the requirement to improve load times for a global user base.

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Availability Zones

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Regional Edge Caches

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AWS Direct Connect Locations

Question 6

A company runs a web application on AWS that experiences unpredictable traffic spikes. The operations team wants the infrastructure to automatically add compute capacity when demand increases and remove it when demand decreases, without manual intervention. The team also wants to pay only for the compute resources they actually use. Which cloud computing concept does this scenario best describe?

Accepted Answer

Elasticity. Elasticity is the ability of a cloud system to automatically scale resources up or down based on demand. In this scenario, AWS services like Auto Scaling groups and Amazon EC2 can add instances during traffic spikes and terminate them when demand drops, ensuring the infrastructure matches workload requirements without manual intervention.

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High availability

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Fault tolerance

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Pay-as-you-go

Question 7

A company is deploying a web application on AWS. The application will run on multiple Amazon EC2 instances distributed across two Availability Zones. An Application Load Balancer will distribute incoming traffic across the instances. The company's primary goal is to ensure the application remains available to users even if one Availability Zone experiences a service disruption. Which cloud computing concept does this architecture primarily demonstrate?

Accepted Answer

High availability. This architecture demonstrates high availability because it uses multiple EC2 instances across two Availability Zones with an Application Load Balancer to distribute traffic. If one AZ fails, the load balancer automatically routes traffic to the healthy instances in the other AZ, ensuring the application remains accessible. High availability focuses on minimizing downtime by eliminating single points of failure through redundancy.

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Elasticity

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Scalability

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Fault tolerance

Question 8

A company uses a continuous integration and continuous deployment (CI/CD) pipeline to deploy applications on AWS. The development teams frequently create feature branches in the code repository. The company wants to automatically provision a complete, isolated environment (including compute, storage, and networking) for each new feature branch, with no manual intervention. The environment must be ready within minutes of the branch creation. Which characteristic of cloud computing does this requirement primarily demonstrate?

Accepted Answer

On-demand self-service. The requirement to automatically provision a complete, isolated environment for each new feature branch without manual intervention directly demonstrates the on-demand self-service characteristic of cloud computing. This characteristic allows users to provision computing resources automatically as needed, without requiring human interaction with service providers. In this scenario, the CI/CD pipeline triggers the creation of compute, storage, and networking resources via AWS APIs (e.g., CloudFormation, AWS CDK, or Terraform) the moment a branch is created, fulfilling the 'no manual intervention' and 'ready within minutes' conditions.

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Rapid elasticity

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High availability

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Measured service

Question 9

A startup is migrating a web application to AWS. The application runs on Amazon EC2 instances that use a custom Amazon Machine Image (AMI) with the company's proprietary software. The security team needs to understand which security tasks the company must perform. Under the AWS Shared Responsibility Model, which of the following is the customer's responsibility?

Accepted Answer

Configuring security groups to control inbound traffic to the instances. Configuring security groups is a customer responsibility because security groups act as a virtual firewall for EC2 instances, controlling inbound and outbound traffic at the instance level. Under the AWS Shared Responsibility Model, the customer is responsible for configuring network access controls, while AWS manages the underlying infrastructure. This includes defining rules based on IP protocols, ports, and source/destination CIDR ranges.

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Patching the hypervisor that hosts the EC2 instances

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Physical security of the data center where the instances run

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Maintaining the underlying network infrastructure

Question 10

A company runs a batch processing workload on an on-premises data center. The servers are powerful machines that are used at maximum capacity only for a few days each month during financial reporting periods. For the rest of the month, the servers run at very low utilization. The CFO wants to migrate this workload to AWS to reduce costs. Which characteristic of AWS cloud computing is most directly aligned with the CFO's goal of paying only for the compute capacity actually used?

Accepted Answer

Pay-as-you-go pricing model. The pay-as-you-go pricing model (Option C) directly aligns with the CFO's goal because it allows the company to pay only for the compute capacity they actually consume, with no upfront costs or long-term commitments. In this scenario, the batch processing workload runs at maximum capacity only a few days per month, so the company can provision resources during those peaks and stop them during low-utilization periods, avoiding the cost of idle on-premises servers. This model eliminates the need to pay for unused capacity, directly reducing costs as the CFO desires.

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High availability across multiple Availability Zones

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Elasticity to automatically scale resources up and down

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The ability to choose from a wide variety of instance types

Question 11

A company runs a web application on a single Amazon EC2 instance. As the application gains popularity, the instance frequently reaches 100% CPU utilization during peak hours, causing slow response times. The operations team is evaluating two approaches: (1) migrate the application to a larger EC2 instance type with more CPU and memory, or (2) add multiple smaller EC2 instances behind a load balancer and distribute the traffic. Which cloud computing concept does approach (1) represent?

Accepted Answer

Vertical scaling. Approach (1) involves moving the application to a larger EC2 instance type with more CPU and memory, which is the definition of vertical scaling (scaling up). This increases the capacity of a single resource rather than adding more instances.

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Elasticity

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High availability

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Horizontal scaling

Question 12

A developer needs to launch a test server for a new application prototype. The developer logs into the AWS Management Console, selects an Amazon EC2 instance type, configures the security group, and starts the instance. The instance is running within two minutes, and the developer did not need to submit a formal request to the company's IT procurement team or wait for approval from a cloud administrator. Which essential characteristic of cloud computing does this scenario best demonstrate?

Accepted Answer

On-demand self-service. The scenario demonstrates on-demand self-service because the developer was able to provision and launch an EC2 instance directly through the AWS Management Console without any human interaction with IT procurement or a cloud administrator. This characteristic, defined by NIST as a core pillar of cloud computing, allows users to unilaterally provision computing capabilities as needed automatically, which is exactly what happened when the instance was running within two minutes of the console action.

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Broad network access

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Resource pooling

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Rapid elasticity

Question 13

A company runs a critical e-commerce application in a single AWS Region. The architecture team wants to ensure the application remains available even if an entire data center fails. They plan to deploy the application across multiple physically separate and independent locations within that Region. Which component of the AWS global infrastructure should the team use to achieve this goal?

Accepted Answer

Availability Zones. Availability Zones (AZs) are physically separate and independent data centers within an AWS Region, each with isolated power, cooling, and networking. By deploying the application across multiple AZs, the architecture ensures that if one entire data center fails, the application continues to run in the other AZs, meeting the goal of high availability within a single Region.

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Edge Locations

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AWS Local Zones

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AWS Regions

Question 14

A gaming company is preparing to launch a new online multiplayer game. The company expects the player traffic to be extremely high on the first few days after launch, but then stabilize at a much lower level. The IT team wants to provision sufficient server capacity to handle the launch spike without over-provisioning and wasting money during the quieter periods. Which benefit of cloud computing most directly addresses this requirement?

Accepted Answer

Stop guessing capacity. The requirement is to provision enough capacity for a launch spike without over-provisioning for lower steady-state traffic. AWS Auto Scaling with Elastic Load Balancing directly addresses this by automatically adjusting the number of EC2 instances based on real-time demand, eliminating the need to guess peak capacity. This is the core benefit of 'Stop guessing capacity' — cloud elasticity allows you to match resources to actual usage, not predictions.

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Trade capital expense for variable expense

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Increase speed and agility

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Benefit from massive economies of scale

Question 15

A company runs a customer-facing web application on a single Amazon EC2 instance. To improve resilience, the solutions architect decides to deploy a second EC2 instance in a different Availability Zone and configure an Application Load Balancer to distribute traffic. The goal is to ensure that the application remains accessible even if one instance or one Availability Zone becomes unavailable. Which cloud computing benefit does this architecture primarily aim to achieve?

Accepted Answer

High availability. By deploying a second EC2 instance in a different Availability Zone and using an Application Load Balancer (ALB) to distribute traffic, the architecture ensures that if one instance or one Availability Zone fails, the ALB automatically routes traffic to the healthy instance in the other AZ. This design directly achieves high availability by eliminating a single point of failure and maintaining application uptime during infrastructure failures.

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Elasticity

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Scalability

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Cost optimization