Question 595 of 977
easyMultiple ChoiceObjective-mapped
Patch Production VMs Without Downtime
A cloud administrator needs to apply a critical security patch to a virtual machine that is part of a production application. The application must remain available during patching. Which of the following is the BEST approach?
Quick Answer
The correct approach is to remove the VM from the load balancer, apply the patch, and then return it to service during a maintenance window. This method works because the load balancer directs traffic only to healthy pool members; by removing the VM, you instantly stop new connections to it while the rest of the pool handles user requests, ensuring zero downtime for the application. On the CompTIA Cloud+ CV0-004 exam, this scenario tests your understanding of rolling updates and high-availability design—a common trap is thinking you can patch the VM while it remains in the load balancer, which would cause dropped sessions or serve errors to users. The key memory tip is “Drain, Patch, Return”—think of draining traffic away before touching the VM, just like isolating a patient before surgery. This aligns with the search intent of patching a production VM without downtime using load balancer removal, a critical skill for cloud administrators managing resilient infrastructure.
⚠ Common exam trap
Many candidates think patching all VMs simultaneously is faster and therefore better, but they overlook the critical requirement of maintaining application availability, which is explicitly stated in the question.
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
✓
Remove the VM from the load balancer, apply the patch, then return it to service during a maintenance window
Removing the VM from the load balancer ensures that no new traffic is sent to it while the patch is applied, maintaining application availability for users. After the patch is applied and the VM is verified as healthy, it can be returned to the load balancer pool. This approach aligns with a rolling update strategy, which is the standard method for applying patches to production VMs without downtime.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Postpone the patch until the next scheduled update cycle
Why it's wrong here
Postponing critical security patches is not recommended.
- ✓
Remove the VM from the load balancer, apply the patch, then return it to service during a maintenance window
Why this is correct
Rolling patching maintains availability.
- ✗
Patch all VMs simultaneously to minimize the time to full deployment
Why it's wrong here
Simultaneous patching may cause complete application outage.
- ✗
Apply the patch during peak usage hours to ensure immediate deployment
Why it's wrong here
Peak hours is worst time for maintenance.
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Same concept, more angles
1 more way this is tested on CV0-004
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A cloud administrator wants to ensure that patches are applied to cloud workloads with minimal risk. Which TWO practices should the administrator follow? (Choose two.)
easy- ✓ A.Automate patch deployment using orchestration tools.
- B.Skip patches for legacy systems to avoid regression.
- C.Patch in production during peak hours to save time.
- D.Always apply patches manually to ensure control.
- ✓ E.Test patches in a staging environment first.
Why A: Automating patch deployment using orchestration tools ensures consistent, repeatable, and scheduled patching across cloud workloads, reducing human error and manual overhead. Option E is correct because testing patches in a staging environment first validates compatibility and identifies regressions before production deployment, which is a critical risk mitigation practice in cloud operations.
Last reviewed: Jun 25, 2026
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.
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