AWS Certified Cloud Practitioner CLF-C02 Practice Questions with Explanations
Questions
A startup wants to launch its product without buying servers up front and pay only for the computing it actually uses. Which cloud benefit does this describe?
- Trade fixed expense for variable expense
- Go global in minutes
- Stop guessing about capacity
- Benefit from high availability in many Regions
An online store automatically adds servers during a holiday sale and removes them when traffic drops. Which cloud characteristic is this?
- Elasticity
- Durability
- Fault tolerance
- Portability
AWS buys hardware for millions of customers, so it can keep lowering prices over time. Which benefit is this?
- Massive economies of scale
- Increase speed and agility
- Go global in minutes
- Stop guessing about capacity
Developers used to wait weeks for new test servers. Now they create them in minutes. Which benefit does this show?
- Increased speed and agility
- Economies of scale
- Global reach
- Data durability across many sites
A company in Ohio deploys its app close to customers in Europe and Asia in an afternoon. Which benefit is this?
- Go global in minutes
- Trade capital for variable expense
- Economies of scale
- Stop maintaining data centers
A company stops racking servers and replacing failed drives so its staff can focus on building the product. Which benefit is this?
- Stop spending money running and maintaining data centers
- Benefit from economies of scale
- Trade fixed capital expense for variable, pay-as-you-go expense
- Go global in minutes
Which statement best describes the difference between scalability and elasticity?
- Scalability is the ability to handle more load; elasticity is automatically adding and removing resources as demand changes
- Scalability only applies to storage services like S3; elasticity only applies to compute, database, and networking services
- Scalability means paying less over time; elasticity means keeping data in more than one Region
- Scalability is automatic resizing; elasticity is the ability to buy hardware when needed
In the AWS Cloud, you must estimate your peak capacity before launch, the same as you would on-premises.
Which are advantages of cloud computing that AWS describes? (Select TWO.)
- Trade fixed expense for variable expense
- Benefit from massive economies of scale
- Guaranteed zero downtime for every workload
- No security responsibilities for the customer
How many pillars does the AWS Well-Architected Framework have?
- Six
- Five
- Four
- Seven
Which Well-Architected pillar focuses on minimizing the environmental impact of running cloud workloads?
- Sustainability
- Operational excellence
- Cost optimization
- Performance efficiency
"Automatically recover from failure" and "test recovery procedures" are design principles of which pillar?
- Reliability
- Security
- Operational excellence
- Performance efficiency
"Use serverless architectures" and "experiment more often" are design principles of which pillar?
- Performance efficiency
- Reliability
- Cost optimization
- Operational excellence
"Perform operations as code" and "make frequent, small, reversible changes" belong to which pillar?
- Operational excellence
- Reliability
- Security
- Sustainability
"Enable traceability" and "keep people away from data" belong to which pillar?
- Security
- Reliability
- Operational excellence
- Cost optimization
"Adopt a consumption model" and "stop spending money on undifferentiated heavy lifting" belong to which pillar?
- Cost optimization
- Sustainability
- Performance efficiency
- Reliability
Which AWS service lets you review a workload against the six pillars of AWS best practice and track improvement plans?
- AWS Well-Architected Tool
- AWS Artifact
- AWS Config
- Amazon Inspector
An architect runs EC2 instances in two Availability Zones behind a load balancer. Which design principle is she following?
- Eliminate single points of failure
- Scale vertically instead of horizontally
- Tightly couple the application tiers
- Keep all resources in one location
An order system puts orders in an Amazon SQS queue so a crash in the processing tier doesn't lose any orders. Which principle is this?
- Loose coupling between components
- Vertical scaling of the database
- Static capacity planning
- Single-AZ deployment
Which of these is NOT one of the six AWS Cloud Adoption Framework (CAF) perspectives?
- Finance
- Governance
- Platform
- People
Which AWS CAF perspective focuses on culture, organizational change, and training the workforce for the cloud?
- People
- Business
- Operations
- Platform
Which AWS CAF perspective makes sure cloud investments accelerate digital transformation and outcomes for the organization?
- Business
- Governance
- Security
- Platform
Which AWS CAF perspective covers program management, benefits management, risk, and cloud financial management?
- Governance
- Business
- People
- Operations
Which AWS CAF perspective focuses on building a scalable hybrid cloud environment and modernizing existing workloads?
- Platform
- Operations
- Security
- Business
Which AWS CAF perspective makes sure cloud services are delivered at agreed levels, with monitoring and incident management?
- Operations
- Governance
- Platform
- People
A company moves its virtual machines to Amazon EC2 exactly as they are, with no changes. Which migration strategy is this?
- Rehost
- Refactor
- Repurchase
- Replatform
A team moves its self-managed MySQL server to Amazon RDS to cut admin work but keeps the application's design the same. Which strategy is this?
- Replatform
- Rehost
- Retire
- Refactor
A company drops its on-premises CRM and moves to a SaaS CRM product. Which strategy is this?
- Repurchase
- Rehost
- Relocate
- Retain
A team rewrites a monolithic app as serverless microservices to gain agility. Which strategy is this?
- Refactor
- Replatform
- Rehost
- Repurchase
During a migration review, a team finds an app nobody has used in two years and shuts it down. Which strategy is this?
- Retire
- Retain
- Rehost
- Relocate
A company must move its on-premises Oracle data into Amazon Aurora while the source keeps running, with minimal downtime. Which service fits?
- AWS Database Migration Service
- AWS DataSync
- AWS Application Migration Service
- AWS Backup
Which service rehosts physical, virtual, or cloud servers on AWS by continuously replicating their disks?
- AWS Application Migration Service
- AWS Database Migration Service
- AWS DataSync
- AWS Storage Gateway
Which are business outcomes the AWS CAF says cloud adoption can improve? (Select TWO.)
- Reduced business risk
- Increased operational efficiency
- Guaranteed zero migration cost
- No need to train staff
After moving all servers to AWS, which cost does a company typically stop paying directly?
- Data center power, cooling, and physical security
- Salaries for its application developers
- Licenses for its own custom software
- Advertising for its products
Which is the most accurate total cost of ownership (TCO) comparison between on-premises and AWS?
- One that includes staff time, facilities, and hardware refresh, not just server prices
- One that compares only the purchase price of new servers with the On-Demand hourly rates for EC2
- One that counts only software licensing because hardware costs are the same
- One that compares only electricity bills before and after the migration
A company wants to reuse its existing per-core, server-bound Windows Server licenses on EC2. Which option supports this?
- Dedicated Hosts
- Spot Instances
- Savings Plans
- On-Demand Instances on shared hardware
An EC2 instance averages 6% CPU. Moving it to a smaller instance type to save money is called what?
- Rightsizing
- Overprovisioning
- Vertical scaling up
- Lift and shift
What economic benefit comes from defining infrastructure with AWS CloudFormation templates?
- Fewer manual errors and less staff time spent on repetitive setup
- Lower hourly prices for every resource that the template creates and manages
- Free data transfer for resources the template deploys
- Automatic Reserved Instance discounts for all stacks
Moving to the cloud shifts spending from capital expenditure (CapEx) toward operational expenditure (OpEx).
How does using Amazon RDS instead of running a database on EC2 lower operating costs?
- It cuts the time staff spend on patching, backups, and other routine database administration
- It removes all charges for database storage and data transfer
- It lets the database run without any compute capacity
- It shifts responsibility for the physical server hardware to the customer, so AWS can lower the price
Under the shared responsibility model, which task is AWS responsible for?
- Physical security of the data centers
- Patching the guest OS on EC2 instances
- Writing IAM policies for the customer's users
- Configuring security group rules
A company runs a web server on Amazon EC2. Which task is the company responsible for?
- Patching the guest operating system
- Replacing failed host hardware
- Patching the hypervisor
- Securing the data center building
Which task is the customer responsible for when storing data in Amazon S3?
- Setting bucket policies and controlling who can access objects
- Replacing the disks that store the objects
- Patching the servers that run the S3 service
- Guarding the physical facilities where the S3 data is actually stored
With AWS Lambda, who patches the operating system that runs your functions?
- AWS
- The customer
- The customer's AWS Partner
- Both share it equally
Which control does AWS describe as shared between AWS and the customer?
- Patch management
- Physical and environmental controls
- Hardware disposal
- Data center access logging
Which control does a customer fully inherit from AWS?
- Physical and environmental controls
- Patch management
- Configuration management
- Awareness and training
The more managed a service is, the more security responsibility shifts to the customer.
Regardless of which AWS service is used, what is the customer always responsible for?
- Their data and who is granted access to it
- The hypervisor that runs their workloads
- Cooling and power in the data center
- The physical network cabling
Who configures the security group rules that control traffic to an EC2 instance?
- The customer
- AWS
- AWS Support
- The AWS Trust & Safety team
With Amazon RDS, who applies patches to the database engine?
- AWS, during a maintenance window the customer can choose
- The customer, by logging in to the database host
- An AWS Partner, under a separate support contract
- No one, because managed database engines never need patches