KVM/QEMU Concepts and Operations JN0-214 Practice Questions (Page 1)

Questions 1–5

1. 1expert · hard

   A VM on a KVM host cannot communicate with other VMs on the same host, but it can reach the internet. The admin checks the network configuration and finds the VM is attached to a user-mode network (SLIRP). Which change should the admin make to allow VM-to-VM communication?

   • AConfigure port forwarding on the host for each VM.
   • BAdd a second NIC to the VM using user-mode networking.
   • CChange the VM's network to a virtual bridge that all VMs share.
   • DAssign static IPs to the VMs in the same subnet as the host.
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2. 2application · medium

   A junior admin is asked to explain how a VM on a KVM host gets its virtual CPU and memory, and how it communicates with the outside world. The admin knows that KVM is a kernel module and QEMU is a userspace emulator. Which statement correctly describes the division of labor between KVM and QEMU?

   • AQEMU is responsible for CPU and memory virtualization, while KVM only manages the virtual network bridge.
   • BKVM provides the virtual CPU and memory virtualization via hardware extensions, while QEMU emulates devices and provides the userspace interface for I/O.
   • CBoth KVM and QEMU are independent hypervisors that can run VMs without each other.
   • DKVM handles all device emulation, while QEMU only provides a command-line interface for creating VMs.
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4. 3foundation · easy

   In a KVM/QEMU VM configuration, which element specifies the number of virtual CPUs allocated to the guest?

   • A<processor>
   • B<memory>
   • C<vcpu>
   • D<cpu>
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5. 4application · medium

   An admin wants to create a clone of an existing VM to test a new application without affecting the original. The original VM is currently running. Which approach should the admin use?

   • AShut down the VM, clone the disk image with qemu-img, and create a new VM using the cloned disk.
   • BUse virsh snapshot and then create a new VM from the snapshot.
   • CCopy the VM's XML definition and start a new VM with the same disk image.
   • DUse virsh migrate to copy the VM to another host.
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6. 5application · medium

   An admin needs to move a running VM from one KVM host to another with minimal downtime. The VM's disk is stored on shared storage accessible to both hosts. Which migration method should the admin use?

   • ASnapshot the VM and restore it on the destination host.
   • BStorage migration using virsh blockcopy
   • COffline migration by shutting down the VM and copying the disk image.
   • DLive migration using virsh migrate --live
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