Task 1.2: Identify design principles of the AWS Cloud.

• ASustainability

  Correct

  The sustainability pillar focuses on environmental impacts, especially energy consumption and efficiency.

• BCost optimization

  Incorrect

  Its design principles are about spending: paying for what you consume, measuring business output against cost, and attributing spend. Energy is not its focus.

• CPerformance efficiency

  Incorrect

  Its design principles are about meeting requirements efficiently — managed services, global deployment, serverless, experimentation — not about environmental impact.

• DReliability

  Incorrect

  Its design principles are about recovering from failure, testing recovery and scaling horizontally, not energy use.

Of the six pillars, sustainability is the one whose stated focus is environmental impact: energy consumption and efficiency.

• AImplement a strong identity foundation

  Incorrect

  This is a security pillar principle: least privilege, separation of duties and central identity management.

• BAutomatically recover from failure

  Correct

  A reliability principle: watch key metrics and run automation when a threshold is breached, so failures are worked around or repaired without waiting for a person.

• CAdopt a consumption model

  Incorrect

  This is a cost optimization principle: pay only for what you consume, for example by stopping test environments outside working hours.

• DDemocratize advanced technologies

  Incorrect

  This is a performance efficiency principle: consume complex technologies as services instead of running them yourself.

• ETest recovery procedures

  Correct

  A reliability principle: in the cloud you can simulate failures and validate your recovery before a real failure happens.

Each pillar has its own short list of design principles. Reliability's are about failure: recover automatically, test recovery, scale horizontally, stop guessing capacity and manage change through automation.

• AReliability

  Incorrect

  Reliability's principles include managing change through automation, but its list is about failure: recover automatically, test recovery, scale horizontally and stop guessing capacity.

• BPerformance efficiency

  Incorrect

  Its principles are about using resources efficiently: democratize advanced technologies, go global in minutes, use serverless architectures, experiment more often and consider mechanical sympathy.

• CSecurity

  Incorrect

  Its principles include a strong identity foundation, traceability, security at all layers and protecting data in transit and at rest.

• DOperational excellence

  Correct

  Both phrases are operational excellence design principles, alongside safely automating where possible, anticipating failure and learning from all operational events and metrics.

Operational excellence is the pillar about how a workload is run and changed: small reversible changes, procedures that keep improving, and learning from every event.

• AImplement a strong identity foundation

  Incorrect

  This principle is about least privilege, separation of duties and centralized identity management — who may do what, not layered controls.

• BApply security at all layers

  Correct

  This principle calls for defense in depth with multiple security controls at every layer, from the network edge and VPC to the operating system, application and code.

• CKeep people away from data

  Incorrect

  This principle reduces direct access to and manual processing of data, to cut the risk of mishandling and human error.

• DPrepare for security events

  Incorrect

  This principle is about incident management: having response processes and running simulations so the team can detect, investigate and recover quickly.

Controls stacked at every layer, so no single failure exposes the workload, is defense in depth — the security pillar's "apply security at all layers".

• ACost optimization

  Incorrect

  Cost optimization's principles are cloud financial management, a consumption model, measuring overall efficiency, avoiding undifferentiated heavy lifting and attributing expenditure.

• BPerformance efficiency

  Correct

  Both are performance efficiency principles, along with democratizing advanced technologies, going global in minutes and considering mechanical sympathy.

• CSustainability

  Incorrect

  Sustainability focuses on environmental impact, especially energy consumption and efficiency.

• DOperational excellence

  Incorrect

  Operational excellence's principles include making frequent, small, reversible changes, anticipating failure and learning from operational events.

Performance efficiency is about using resources efficiently as demand and technology change: let AWS run the complex parts, and try new options often.