102.6 Linux as a Virtualization Guest LPIC-1 Practice Questions (Page 5)

Questions 21–25

1. 21expert · hard

   A Linux VM on a KVM host is experiencing intermittent network connectivity. The administrator notices that the guest's network interface is configured with a static IP, but the host's virtual network uses a different subnet. What is the most likely cause of the connectivity issue?

   • AThe host's network is down.
   • BThe virtio_net module is not loaded.
   • CThe guest's static IP is on a different subnet than the host's virtual network.
   • DThe guest's firewall is blocking traffic.
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2. 22expert · hard

   A Linux VM on a host with 8 GB RAM is configured with 4 GB RAM. The VM is running a memory-intensive application that occasionally uses more than 4 GB, causing the guest to swap heavily. The administrator wants to improve performance without increasing the host's physical RAM. Which approach is most effective?

   • AAdd a swap file inside the guest.
   • BReduce the VM's memory allocation to force the application to use less.
   • CEnable memory ballooning in the hypervisor.
   • DIncrease the VM's memory allocation to 6 GB, if the host has sufficient free memory.
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4. 23foundation · easy

   What is a key consideration when taking a snapshot of a running Linux guest?

   • ASnapshots are only possible if the guest is powered off.
   • BThe guest filesystem should be quiesced or the guest should be paused to ensure data consistency.
   • CSnapshots replace the need for regular backups.
   • DThe snapshot will always be consistent without any special preparation.
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5. 24expert · hard

   A Linux guest on a KVM host has a virtio network device, but the interface is not showing up in the guest. The administrator has confirmed that the virtio_net module is loaded. What is the most likely cause of the missing interface?

   • AThe host's virtual network is not active.
   • BThe guest's firewall is blocking the interface.
   • CThe interface is not configured in the guest's network configuration files.
   • DThe virtio_net module is not compatible with the guest kernel.
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6. 25application · medium

   A company runs a Linux VM on VMware vSphere. The VM's display resolution is stuck at 800x600 and the mouse cursor lags. The administrator wants to improve the guest's graphical experience and enable features like copy-paste between the guest and the host console. Which action should the administrator take?

   • AEnable 3D acceleration in the VM's display settings.
   • BChange the guest's display driver to the generic VESA driver.
   • CInstall the open-vm-tools package in the guest.
   • DIncrease the guest's video memory in the VM settings.
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