CV0-004 Cloud Architecture and Design Practice Question
A company is designing a hybrid cloud architecture. They need to ensure high availability for a critical application. Which TWO of the following are best practices for achieving high availability in a hybrid cloud environment?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement an active-active architecture across on-premises and cloud
Using multiple availability zones within a region protects against data center failure. An active-active architecture ensures both on-premises and cloud are handling traffic, providing redundancy. Deploying in a single zone creates a single point of failure. Using only on-premises does not leverage cloud for HA. A single load balancer is a SPOF.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Rely solely on on-premises infrastructure with cloud as a backup
Why it's wrong here
Treating cloud purely as backup leaves the primary on-premises site as a single point of failure, so failover is manual and slow. This pattern suits disaster recovery with relaxed recovery objectives, not continuous availability, which needs active workloads in both environments.
- ✓
Implement an active-active architecture across on-premises and cloud
Why this is correct
Active-active deployment runs workloads simultaneously in both on-premises and cloud, so traffic fails over instantly when one site degrades. This directly satisfies the stem's high-availability requirement for a critical application, unlike active-passive designs that incur downtime during failover. Distributing load across both environments also removes the single point of failure inherent in a single-site deployment.
- ✗
Use a single load balancer to route all traffic
Why it's wrong here
One load balancer is itself a single point of failure and cannot span on-premises and cloud networks. A single load balancer is fine where traffic is low and an outage window is acceptable, but high availability requires redundant load balancing across environments.
- ✓
Use multiple availability zones within a cloud region
Why this is correct
Multiple availability zones provide physically separate datacentre locations with independent power, cooling and networking inside one cloud region. Deploying the critical application across zones lets it survive a single zone failure without manual intervention, satisfying the stem's high-availability requirement while keeping latency low.
- ✗
Deploy the application in a single availability zone to reduce complexity
Why it's wrong here
A single availability zone gives no redundancy: an AZ outage takes the application down, defeating the high availability requirement. It appeals when reducing cost or operational overhead, and single-AZ placement is acceptable for non-critical, dev or test workloads where downtime is tolerated.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CV0-004 exam.