220-1101 Virtualization and Cloud Computing Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  Virtualization

  Why this is correct

  Virtualization uses a hypervisor (Type 1 or Type 2) to create multiple independent virtual machines on a single physical host, each with its own complete guest operating system. Because each VM has full control over its virtualized CPU, memory, storage, and devices, developers can run different OS families, kernel versions, or configurations simultaneously without interference. The hypervisor enforces hardware-level isolation, so a crash or security breach in one VM does not affect the others.

• ✗

  Containerization

  Why it's wrong here

  Containerization leverages the host OS kernel and isolates processes through namespaces and cgroups, so containers do not contain or run a separate operating system. This makes them lightweight and fast to start, but they are constrained to the same kernel and OS family as the host, preventing developers from using radically different OS versions or kernel-specific configurations. Containers provide application-level isolation, but because they share the kernel, a kernel-level vulnerability can affect all containers, lacking the strong isolation that a separate VM provides.

  When this WOULD be correct

  When the requirement is to run multiple isolated application environments on a single host with fast deployment and minimal overhead, and each environment can share the host OS kernel, containerization (e.g., Docker) is the best choice.

• ✗

  Cloud computing

  Why it's wrong here

  Cloud computing is an on-demand delivery model for shared computing resources over a network, often relying on virtualization but not intrinsically tied to a specific host or local isolation mechanism. It typically abstracts the underlying hardware and provides multi-tenant services, meaning the isolation boundary is managed by the cloud provider rather than by a local hypervisor. For local, simultaneous, isolated developer environments, cloud computing is too broad and does not directly solve the requirement of creating separate OS instances on a single server.

• ✗

  Dual boot

  Why it's wrong here

  Dual boot involves installing multiple operating systems on one computer and choosing which one to load at boot time, meaning only one OS is active at any given moment. To switch between environments, a developer must shut down and reboot, which disrupts workflow and prevents concurrent access for multiple developers. Dual boot cannot provide simultaneous, isolated workspaces because it operates sequentially, not in parallel, and offers no isolation while multiple OS instances would need to run at once.

  When this WOULD be correct

  A user needs to run two different operating systems on the same hardware, each with full hardware access, and does not require concurrent operation or isolation between them.

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 220-1101 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official 220-1101blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”

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