CLF-C02 Cloud Concepts Practice Test 3 — 15 Questions

Question 1

A company is designing a highly available application that must remain operational even if a single physical data center fails. The application will be deployed in the us-east-1 Region. The company wants to distribute the application across multiple physical locations within the Region, where each location has independent power, cooling, and networking. Which AWS Global Infrastructure component should the company use to meet this requirement?

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

Accepted Answer

Availability Zone. Availability Zones (AZs) are distinct physical locations within an AWS Region, each with independent power, cooling, and networking, and are interconnected through low-latency links. By deploying the application across multiple AZs, the company ensures high availability and fault tolerance against the failure of a single physical data center. This directly meets the requirement to remain operational even if one physical data center fails.

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AWS Region

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Edge Location

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Local Zone

Question 2

A company hosts a web application on an Amazon EC2 instance. The company installs its own application software and configures the operating system. The company also uses AWS Key Management Service (AWS KMS) to create a customer-managed key to encrypt data on the Amazon Elastic Block Store (Amazon EBS) volume attached to the instance. According to the AWS shared responsibility model, which of the following is the responsibility of AWS?

Accepted Answer

Ensuring the physical security of the data center where the Amazon EC2 instance runs.. Under the AWS shared responsibility model, AWS is responsible for the security of the cloud, which includes the physical security of data centers, hardware, networking, and facilities where EC2 instances run. This is a foundational layer that customers cannot manage or control.

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Encrypting the data on the Amazon EBS volume using the customer-managed key.

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Patching the operating system of the Amazon EC2 instance.

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Configuring the security group rules to restrict traffic to the Amazon EC2 instance.

Question 3

A company moves its infrastructure to AWS. The company's IT team notices that they have no control over which specific physical server their virtual machines run on, and they are unaware of the exact hardware location except at the regional level. The underlying physical resources are shared across multiple AWS customers. Which essential characteristic of cloud computing does this scenario BEST describe?

Accepted Answer

Resource pooling. Resource pooling is the cloud characteristic where the provider's computing resources are pooled to serve multiple customers using a multi-tenant model, with physical and virtual resources dynamically assigned and reassigned according to customer demand. The scenario describes the customer having no control over the exact physical server or hardware location beyond the regional level, which is the essence of resource pooling. This allows AWS to achieve economies of scale while abstracting the underlying hardware from the customer.

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On-demand self-service

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Broad network access

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Rapid elasticity

Question 4

A company runs a web application on Amazon EC2 instances. The application experiences unpredictable traffic spikes during marketing campaigns. The company configures an Amazon EC2 Auto Scaling group to automatically add instances when CPU utilization exceeds 70% and remove instances when it drops below 30%. This allows the company to handle peak loads without manual intervention and avoid paying for idle capacity during low traffic periods. Which essential characteristic of cloud computing does this configuration BEST demonstrate?

Accepted Answer

Rapid elasticity. The Auto Scaling group dynamically adjusts the number of EC2 instances in response to CPU utilization thresholds, scaling out during traffic spikes and scaling in during low traffic. This ability to rapidly provision and release compute resources to match demand is the defining characteristic of rapid elasticity, which allows the company to handle peak loads without manual intervention and avoid paying for idle capacity.

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On-demand self-service

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Broad network access

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Measured service

Question 5

A development team needs to spin up a new Amazon RDS database instance for a proof-of-concept application. The team can log into the AWS Management Console, select the database engine, configure settings, and launch the instance within minutes, without needing to submit a ticket or wait for IT operations to provision hardware. Which essential characteristic of cloud computing does this scenario BEST demonstrate?

Accepted Answer

On-demand self-service. The scenario describes a user independently provisioning an RDS instance through the AWS Management Console without any human interaction with IT operations. This directly aligns with the on-demand self-service characteristic of cloud computing, where users can provision computing resources automatically as needed without requiring service provider interaction.

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Resource pooling

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Measured service

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Rapid elasticity

Question 6

A company is launching a new application and expects user demand to grow gradually over the next 12 months. To control upfront costs, the company plans to start with a small number of Amazon EC2 instances and manually add more instances each month as the user base increases. The operations team will monitor usage and adjust capacity based on observed trends. Which cloud computing concept does this approach BEST illustrate?

Accepted Answer

Scalability. The scenario describes manually adding EC2 instances over time to match growing demand, which is a classic example of scalability—the ability to increase or decrease resources to handle changing workloads. Scalability focuses on planned capacity adjustments, whereas elasticity involves automatic, real-time scaling in response to demand fluctuations. Here, the manual, monthly additions based on observed trends align with scalability, not the automated provisioning that defines elasticity.

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Elasticity

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High availability

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Fault tolerance

Question 7

A company is migrating its internal email system to a cloud-based solution. After the migration, the company's IT team no longer needs to manage the email servers, apply operating system patches, or upgrade the email software. The cloud provider handles all underlying infrastructure, the platform, and the application itself. Users access their email through a web browser or a mobile app. Which cloud service model does this scenario describe?

Accepted Answer

Software as a Service (SaaS). This scenario describes Software as a Service (SaaS) because the cloud provider delivers the entire email application, including the underlying infrastructure, platform, and software, to end users. The IT team has no responsibility for managing servers, applying OS patches, or upgrading the email software—users simply access the email via a web browser or mobile app. This matches the SaaS model, where the provider manages everything from the hardware to the application, and the customer only consumes the software.

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Infrastructure as a Service (IaaS)

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Platform as a Service (PaaS)

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On-premises deployment

Question 8

A financial services company maintains a legacy on-premises database for sensitive customer data that must remain in a physically controlled environment due to regulatory requirements. The company runs its customer-facing web application on AWS to benefit from scalability and global reach. A dedicated encrypted VPN connection securely links the on-premises environment with the AWS cloud. Which cloud deployment model does this scenario BEST represent?

Accepted Answer

Hybrid cloud. This scenario best represents a hybrid cloud because it combines on-premises infrastructure (the legacy database) with public cloud resources (AWS) connected via a dedicated encrypted VPN. The hybrid cloud model allows the company to keep sensitive data in a physically controlled environment while leveraging AWS's scalability for the customer-facing web application.

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Public cloud

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Private cloud

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Community cloud

Question 9

A company has deployed a customer relationship management (CRM) application on AWS. Sales representatives use the application from their office laptops, company-issued tablets, and personal smartphones. They access the application securely through a web browser using HTTPS from any location, including client sites and home offices. This capability is an example of which essential characteristic of cloud computing?

Accepted Answer

Broad network access. Broad network access is the correct answer because the scenario describes the ability to access the CRM application from various devices (laptops, tablets, smartphones) over the network using standard protocols (HTTPS). This aligns with the NIST definition of broad network access, which states that capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms.

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Rapid elasticity

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Measured service

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Resource pooling

Question 10

A company is designing a critical web application that must remain available even if an entire data center goes offline due to a power outage. The application will run on Amazon EC2 instances in the us-east-1 Region. Which AWS infrastructure strategy should the company use to meet this high-availability requirement?

Accepted Answer

Deploy the EC2 instances across two or more Availability Zones within the us-east-1 Region.. Deploying EC2 instances across two or more Availability Zones (AZs) within a single AWS Region protects against an entire data center failure. Each AZ is physically separated, with independent power, cooling, and networking, so if one AZ goes offline, the application continues running in the other AZs. This design meets the high-availability requirement without the complexity and latency of multi-Region deployment.

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Launch all EC2 instances in a single Availability Zone to ensure low latency between instances.

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Deploy the EC2 instances in multiple AWS Regions, such as us-east-1 and eu-west-1.

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Use separate AWS accounts for each EC2 instance to isolate the workload from a data center failure.

Question 11

A company runs an e-commerce application on AWS that experiences unpredictable traffic spikes during flash sales. The application currently runs on a fixed number of Amazon EC2 instances, which leads to performance degradation during spikes and wasted capacity during low traffic. The company wants to automatically adjust the number of instances based on real-time demand, only paying for the resources it uses. This need best represents which cloud computing concept?

Accepted Answer

Elasticity. (Elasticity) is correct because the scenario describes automatically scaling EC2 instances up and down based on real-time demand, which is the definition of elasticity in cloud computing. AWS Auto Scaling and Amazon EC2 Auto Scaling groups enable this by adding or removing instances in response to CloudWatch metrics, ensuring the application only pays for resources consumed during traffic spikes and low traffic periods.

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High availability

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Fault tolerance

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Durability

Question 12

A company is migrating a three-tier web application to AWS. The application will run on Amazon EC2 instances using a custom Linux distribution, and a self-managed MySQL database will be installed on the same instances. The company's security team needs to understand which security responsibilities belong to AWS and which belong to the company under the AWS Shared Responsibility Model. According to this model, who is responsible for applying operating system security patches to the EC2 instances and for updating the MySQL database software?

Accepted Answer

The company is responsible for both the operating system patches and the MySQL database updates.. Under the AWS Shared Responsibility Model, AWS is responsible for the security of the cloud (e.g., physical infrastructure, hypervisor), while the customer is responsible for security in the cloud (e.g., guest OS, applications, and data). Since the company is using a custom Linux distribution on EC2 instances and installing a self-managed MySQL database, both the operating system patches and the MySQL database updates fall under the customer's responsibility. AWS does not manage or patch the guest operating system or any software installed by the customer on EC2 instances.

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AWS is responsible for both the operating system patches and the MySQL database updates.

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AWS is responsible for the operating system patches, and the company is responsible for the MySQL database updates.

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The company is responsible for the operating system patches, and AWS is responsible for the MySQL database updates.

Question 13

A company is migrating its on-premises application to AWS. The application currently runs on a single server and experiences occasional traffic spikes that cause performance degradation. The company wants to take advantage of cloud computing benefits to handle these spikes automatically without manual intervention. Which AWS Cloud concept would directly address this requirement?

Accepted Answer

Elasticity. Elasticity is the correct concept because it refers to the ability of an AWS infrastructure to automatically scale resources up or down based on demand. In this scenario, the company needs to handle occasional traffic spikes without manual intervention, which is directly addressed by AWS Auto Scaling groups and services like Amazon EC2 Auto Scaling or AWS Lambda's concurrency scaling. This ensures that additional compute capacity is provisioned during spikes and released when demand decreases, optimizing both performance and cost.

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High availability

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Fault tolerance

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Durability

Question 14

A company runs a batch processing job on a single Amazon EC2 instance. The job takes 10 hours to complete. The company needs to reduce the processing time to under 1 hour to meet a new business requirement. The data can be split into independent chunks that can be processed in parallel. Which cloud computing concept would most directly enable the company to achieve this goal?

Accepted Answer

Scalability. Scalability is the correct answer because it refers to the ability to increase resources to handle increased load. By scaling horizontally (adding more EC2 instances) and processing the independent data chunks in parallel, the batch job can be completed in under 1 hour instead of 10 hours.

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Elasticity

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High availability

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Fault tolerance

Question 15

A company runs a critical e-commerce application on a single Amazon EC2 instance in one Availability Zone. The company wants to ensure that if the entire Availability Zone becomes unavailable, the application continues to run without manual intervention. Which AWS cloud concept best describes this requirement?

Accepted Answer

High availability. High availability (B) is the correct concept because it ensures that an application remains operational even when an entire Availability Zone fails. By deploying the EC2 instance across multiple Availability Zones (e.g., using an Auto Scaling group with a minimum of two instances and an Application Load Balancer), the application can automatically fail over to a healthy instance in another zone without manual intervention. This directly addresses the requirement for continuous operation during a zone outage.

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Scalability

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Elasticity

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Disaster recovery