CTO Cloud Strategy & Architecture 5

Question 1

A CTO is tasked with reducing the blast radius of a potential cloud security breach. Which architectural control is most effective?

Accepted Answer

Account-level isolation with separate cloud accounts per environment and workload classification

Answer

Separate cloud accounts per environment and workload create hard security boundaries that limit the blast radius of a compromise to a single account.

Question 2

Which cloud cost optimization lever typically yields the highest savings for predictable, steady-state production workloads?

Accepted Answer

Purchasing Reserved Instances or Savings Plans for 1-3 year commitments

Answer

Reserved Instances and Savings Plans typically offer 40-72% discounts over on-demand pricing for steady-state workloads that run continuously.

Question 3

What is the primary architectural consideration when implementing a CQRS (Command Query Responsibility Segregation) pattern in a cloud application?

Accepted Answer

Commands and queries use separate models and potentially separate data stores, introducing eventual consistency

Answer

CQRS separates write (command) and read (query) models, often using different optimized data stores, which inherently introduces eventual consistency between them.

Question 4

A CTO is designing for a 99.99% SLA (four nines). Which deployment architecture is required?

Accepted Answer

Multi-availability zone active-active with automated failover under 52 minutes of downtime per year

Answer

99.99% availability allows only ~52 minutes of downtime per year, requiring multi-AZ active-active deployment with automated failover to eliminate single points of failure.

Question 5

Which approach best enables a CTO to make evidence-based cloud architecture decisions about performance?

Accepted Answer

Implement distributed tracing, metrics, and SLO-based alerting as part of the architecture from day one

Answer

Distributed tracing, metrics collection, and SLO-based observability built into the architecture from the start provide the evidence base needed for data-driven performance decisions.

(CTO) Certified Chief Technology Officer Practice Test

(CTO) Certified Chief Technology Officer Practice Test

CTO Cloud Strategy & Architecture 5