CLF-C02 Cloud Concepts Practice Test 14 — 15 Questions

Question 1

Which AWS service provides a managed workflow for human review tasks, allowing machine learning models to request human oversight for low-confidence predictions?

Accepted Answer

Amazon Augmented AI (A2I). Amazon Augmented AI (A2I) is the correct service because it provides a managed workflow for human review of machine learning predictions, specifically when models have low confidence. It integrates with services like Amazon Rekognition and Amazon Textract to automatically route low-confidence predictions to human reviewers, enabling a human-in-the-loop (HITL) process without custom infrastructure.

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Amazon SageMaker Ground Truth

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Amazon Mechanical Turk

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Amazon Rekognition Custom Labels

Question 2

A company wants to take advantage of AWS's global infrastructure to replicate their database to a second geographic region for disaster recovery. Which benefit of cloud computing does this leverage?

Accepted Answer

Go global in minutes. AWS's global infrastructure allows you to deploy resources, such as database replicas, across multiple geographic regions in minutes. By using services like Amazon RDS Cross-Region Read Replicas or Aurora Global Database, you can replicate data to a second region for disaster recovery, leveraging the cloud's ability to rapidly expand globally without provisioning physical data centers.

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Economies of scale

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Trade capital expense for variable expense

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Increase speed and agility for experiments

Question 3

A company is designing a cloud architecture and wants to follow the Well-Architected Framework principle of 'stop guessing capacity.' Which AWS feature directly supports this principle?

Accepted Answer

Amazon EC2 Auto Scaling based on CloudWatch metrics. Amazon EC2 Auto Scaling directly supports the 'stop guessing capacity' principle by automatically adjusting the number of EC2 instances in response to real-time demand using CloudWatch metrics (e.g., CPU utilization, memory). This eliminates the need to manually provision for peak loads, ensuring you only pay for what you need while maintaining performance.

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AWS CloudFormation for repeatable deployments

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AWS Trusted Advisor cost optimization checks

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AWS Cost Explorer right-sizing recommendations

Question 4

Which statement correctly describes the difference between horizontal scaling and vertical scaling in cloud computing?

Accepted Answer

Horizontal scaling adds more instances; vertical scaling increases the size of existing instances. Horizontal scaling (scaling out) involves adding more instances of a resource, such as EC2 instances, to distribute the load, while vertical scaling (scaling up) increases the size or capacity of an existing instance, for example by moving from a t2.micro to a t2.large. This distinction is fundamental in AWS cloud architectures, where horizontal scaling improves fault tolerance and availability, and vertical scaling is limited by the maximum instance size.

Answer

Horizontal scaling means increasing instance size; vertical scaling means adding more instances

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Both scaling types produce identical results and are interchangeable in cloud architectures

Answer

Vertical scaling is always preferred because it reduces the number of instances to manage

Question 5

According to the AWS Shared Responsibility Model, which of the following is the customer's responsibility when using AWS Lambda?

Accepted Answer

Writing secure function code and managing IAM permissions for the function. Under the AWS Shared Responsibility Model, AWS manages the security of the cloud, including the Lambda execution environment, runtime, and underlying servers. The customer is responsible for security in the cloud, which includes writing secure function code and managing IAM permissions to control access to the function and its resources. Option C correctly identifies this customer responsibility.

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Patching the Lambda execution environment and runtime

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Managing the underlying servers that run Lambda functions

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Ensuring Lambda scales automatically during traffic spikes

Question 6

A startup founder is evaluating whether to build their own data center or use AWS. Which cloud benefit eliminates the need for guessing future infrastructure requirements and making large upfront investments?

Accepted Answer

Trade capital expense for variable expense and stop guessing capacity. It directly addresses the startup founder's concern about eliminating the need to guess future infrastructure requirements and make large upfront investments. AWS's pay-as-you-go model allows you to trade capital expense (upfront hardware costs) for variable expense (paying only for what you use), and you no longer have to predict capacity needs—you can scale up or down based on actual demand. This is a core pillar of the AWS Well-Architected Framework's Cost Optimization pillar.

Answer

Stop spending money running and maintaining data centers

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Benefit from massive economies of scale

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Increase speed and agility for innovation

Question 7

What is the purpose of an AWS Region when designing a global cloud architecture?

Accepted Answer

To define geographic boundaries for deploying resources, meeting compliance requirements, and minimizing end-user latency. An AWS Region is a distinct geographic area that contains multiple, isolated Availability Zones. Its purpose is to allow customers to deploy resources close to their end users to minimize latency, and to meet data residency and compliance requirements by keeping data within specific geographic boundaries. Each Region operates independently, ensuring fault isolation and regulatory adherence.

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To provide a single physical location for all AWS resources worldwide

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To automatically replicate all data and compute resources across the globe

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To limit the availability of AWS services to specific enterprise customers

Question 8

A company currently owns and operates its own data center. They are considering moving to AWS. Which economic benefit describes the elimination of the costs associated with purchasing, maintaining, and cooling physical servers?

Accepted Answer

Stop spending money running and maintaining data centers. Moving to AWS eliminates the capital and operational expenses associated with owning and operating physical servers, including procurement, maintenance, cooling, and facility management. This aligns with the AWS value proposition of shifting from a capital expenditure (CapEx) model to an operational expenditure (OpEx) model, where customers pay only for the resources they consume.

Answer

Economies of scale

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Go global in minutes

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Increase speed and agility

Question 9

A company is designing a resilient multi-tier web application on AWS. The architect wants to implement the Well-Architected Framework Reliability pillar design principle of 'automatically recover from failure.' Which combination of services implements this most completely?

Accepted Answer

EC2 Auto Scaling + ELB health checks + RDS Multi-AZ. It combines EC2 Auto Scaling to automatically replace unhealthy instances, ELB health checks to detect failures and route traffic away from them, and RDS Multi-AZ to automatically failover to a standby database in a different Availability Zone. This trio directly implements the 'automatically recover from failure' principle by enabling self-healing at both the compute and database tiers without manual intervention.

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Manual restart procedures documented in a runbook

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AWS CloudTrail + Amazon CloudWatch

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AWS Config rules with manual remediation

Question 10

Which cloud computing benefit allows a company's development team to spin up a testing environment in 5 minutes instead of waiting 6 weeks for hardware procurement and data center provisioning?

Accepted Answer

Increase speed and agility. One of the core benefits of cloud computing is the ability to rapidly provision and release resources with minimal management effort. Instead of waiting weeks for hardware procurement and data center provisioning, a development team can spin up a testing environment in minutes using Infrastructure as a Service (IaaS) or Platform as a Service (PaaS) offerings like Amazon EC2 or AWS Elastic Beanstalk. This agility directly reduces time-to-market and enables faster iteration cycles.

Answer

Economies of scale

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High availability

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Pay-as-you-go pricing

Question 11

A company architect uses the Well-Architected Framework to review their workload. Which pillar specifically covers the concepts of selecting the right instance types and sizes, using serverless architectures, and choosing the appropriate storage solution?

Accepted Answer

Performance Efficiency. Performance Efficiency is the correct pillar because it focuses on using computing resources efficiently to meet system requirements, which includes selecting appropriate instance types and sizes, leveraging serverless architectures to eliminate idle capacity, and choosing the right storage solution based on access patterns and performance needs. The Well-Architected Framework defines this pillar as the ability to adapt to workload changes while maintaining efficiency through resource optimization.

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Cost Optimization

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Operational Excellence

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Sustainability

Question 12

A company wants to understand the AWS Well-Architected Framework's sixth pillar added in 2021. Which pillar focuses on minimizing the environmental impact of cloud workloads?

Accepted Answer

Sustainability. The AWS Well-Architected Framework added a sixth pillar, Sustainability, in 2021. This pillar provides design principles and best practices to minimize the environmental impact of cloud workloads, such as optimizing utilization, reducing energy consumption, and selecting efficient hardware and regions.

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Cost Optimization

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Governance

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Resilience

Question 13

A company's CTO asks about the AWS Cloud Adoption Framework (AWS CAF). Which statement about AWS CAF is accurate?

Accepted Answer

AWS CAF organizes guidance into six perspectives covering Business, People, Governance, Platform, Security, and Operations. The AWS Cloud Adoption Framework (AWS CAF) organizes its guidance into six distinct perspectives: Business, People, Governance, Platform, Security, and Operations. These perspectives help organizations identify and address gaps in their cloud readiness across both business and technical domains, providing actionable best practices for cloud adoption.

Answer

AWS CAF is a compliance framework similar to SOC 2 or PCI DSS

Answer

AWS CAF is only relevant for large enterprises migrating more than 1,000 servers

Answer

AWS CAF replaces the AWS Well-Architected Framework for architecture guidance

Question 14

An enterprise is planning their cloud adoption strategy. They want to understand how cloud adoption typically progresses. Which framework provides a structured approach to cloud adoption organized around business, people, governance, platform, security, and operations perspectives?

Accepted Answer

AWS Cloud Adoption Framework (CAF). The AWS Cloud Adoption Framework (CAF) is specifically designed to guide organizations through their cloud adoption journey by providing structured guidance across six core perspectives: Business, People, Governance, Platform, Security, and Operations. Unlike the Well-Architected Framework, which focuses on architectural best practices for building workloads, the CAF addresses the broader organizational and process changes needed for successful cloud adoption.

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AWS Well-Architected Framework

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AWS Migration Hub

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AWS Trusted Advisor

Question 15

Which of the following is NOT one of the five characteristics of cloud computing as defined by NIST?

Accepted Answer

Dedicated hardware allocation per customer. The five essential characteristics of cloud computing as defined by NIST SP 800-145 are on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. Dedicated hardware allocation per customer is not a characteristic; instead, cloud computing relies on resource pooling where physical and virtual resources are dynamically assigned and reassigned according to consumer demand, often with multi-tenant models.

Answer

On-demand self-service

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Resource pooling

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Measured service