The correct answer is Kubernetes with the Horizontal Pod Autoscaler (HPA) because it directly addresses all three requirements: automated scaling based on CPU utilization, zero-downtime rolling updates, and service discovery. HPA continuously monitors pod metrics and adjusts replica counts automatically, while Kubernetes Deployments manage rolling updates by gradually replacing old pods with new ones, ensuring no traffic is dropped. For service discovery, Kubernetes uses built-in DNS (CoreDNS) and Services, allowing microservices to resolve each other by name without external tools. On the CompTIA Cloud+ CV0-004 exam, this question tests your ability to match orchestration features to specific cloud deployment needs—a common trap is confusing HPA with cluster autoscaling, which scales nodes rather than pods. Remember the mnemonic “HPA Handles Pods, Not Nodes” to avoid that mistake.
CV0-004 Deployment Practice Question
This CV0-004 practice question tests your understanding of deployment. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A cloud architect must design a deployment for a containerized microservices application. The requirements include automated scaling based on CPU utilization, rolling updates with zero downtime, and service discovery. Which orchestration feature should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Kubernetes with Horizontal Pod Autoscaler
Kubernetes with Horizontal Pod Autoscaler (HPA) is the correct choice because HPA automatically scales the number of pod replicas based on observed CPU utilization (or custom metrics), meeting the automated scaling requirement. Kubernetes also supports rolling updates with zero downtime via its Deployment controller, which gradually replaces old pods with new ones while maintaining service availability. Additionally, Kubernetes provides built-in service discovery through DNS (CoreDNS) and Services, allowing microservices to find each other by name without external dependencies.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Docker Compose with a reverse proxy
Why it's wrong here
Docker Compose is for single-host orchestration, lacks autoscaling.
✓
Kubernetes with Horizontal Pod Autoscaler
Why this is correct
Kubernetes natively supports autoscaling, rolling updates, and service discovery.
Related concept
Read the scenario before looking for a memorised answer.
✗
Ansible playbooks with Docker modules
Why it's wrong here
Ansible is for configuration management, not real-time orchestration.
✗
AWS ECS with Fargate
Why it's wrong here
ECS with Fargate supports autoscaling but service discovery requires extra setup.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse a container runtime or provisioning tool (like Docker Compose or Ansible) with a full orchestration platform, or assume that a managed service like ECS is an orchestration feature rather than a cloud implementation, missing that Kubernetes is the specific feature set that directly satisfies all three requirements.
Detailed technical explanation
How to think about this question
The Horizontal Pod Autoscaler works by querying the Kubernetes Metrics Server (which collects resource metrics from kubelet's cAdvisor) at a default interval of 15 seconds, then calculating the desired replica count using the formula: desiredReplicas = ceil[currentReplicas * (currentMetricValue / targetMetricValue)]. For rolling updates, the Deployment controller uses a ReplicaSet with a configurable maxSurge and maxUnavailable (default 25%) to ensure zero downtime by gradually shifting traffic. Service discovery leverages CoreDNS, which resolves service names to ClusterIPs, and kube-proxy implements IPVS or iptables rules for load balancing across pods.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Kubernetes with Horizontal Pod Autoscaler — Kubernetes with Horizontal Pod Autoscaler (HPA) is the correct choice because HPA automatically scales the number of pod replicas based on observed CPU utilization (or custom metrics), meeting the automated scaling requirement. Kubernetes also supports rolling updates with zero downtime via its Deployment controller, which gradually replaces old pods with new ones while maintaining service availability. Additionally, Kubernetes provides built-in service discovery through DNS (CoreDNS) and Services, allowing microservices to find each other by name without external dependencies.
What should I do if I get this CV0-004 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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