easyMultiple Select
CV0-004 Practice Question: Which TWO are advantages of using containers over…
Which TWO are advantages of using containers over virtual machines? (Select TWO.)
⚠ Common exam trap
CompTIA often tests the misconception that containers provide stronger isolation than VMs, when in fact VMs offer better security boundaries due to hardware-level virtualization.
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
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Less overhead because they share the host OS kernel
Option B is correct because containers share the host operating system kernel rather than each running a full guest OS, so they avoid the CPU, memory, and storage overhead of duplicating an OS per instance. Option E is correct because a container starts as a process on the already-running host kernel, so it can launch in milliseconds to seconds, whereas a VM must boot an entire guest OS through a hypervisor. Options A, C, and D are not advantages: VMs provide stronger hardware-level isolation than containers, containers do not require a hypervisor (that is a VM characteristic), and containers consume fewer, not larger, resources than VMs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Better hardware isolation
Why it's wrong here
Containers share the host kernel, so isolation is weaker than the hardware-enforced separation a hypervisor gives each virtual machine. Strong hardware isolation is a virtual machine advantage; containers suit scenarios where density and fast startup outweigh strict tenant separation.
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Less overhead because they share the host OS kernel
Why this is correct
Containers share the host operating system kernel rather than each bundling a full guest OS, so they consume far less CPU, memory and disk than equivalent virtual machines. This reduced overhead is the defining resource-efficiency advantage over hypervisor-based virtualisation.
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Requires a hypervisor to run
Why it's wrong here
Containers share the host kernel and therefore need no hypervisor at all; the hypervisor is the virtual machine's own requirement. Hypervisors are the right answer when you need to run multiple heterogeneous guest operating systems with hardware-enforced isolation.
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Larger resource consumption
Why it's wrong here
Containers share the host kernel, so they consume fewer resources than virtual machines, each of which runs a full guest OS. Larger resource consumption describes virtual machines; containers would be chosen precisely when you want to pack more workloads onto the same hardware.
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Faster startup time
Why this is correct
Because containers share the host kernel and start as isolated processes rather than booting a full guest operating system, they reach a running state in seconds or less. Virtual machines must initialise firmware, kernel and services, making their startup markedly slower.
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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.