304-200 sample questions

Question 1

Which of the following statements is true regarding the following output of xl list:

Name ID Mem VCPUs State Time(s)
Domain-0 0 384 1 --r----- 498.7
Debian 2 305 1 --p--- 783.5
Slack 6 64 1 -b----313.6
CentOS 7 512 2 r----455.1

Accepted Answer

Slack is idle orwaiting for I/O.

Answer

Centos is the domain which has consumed the most CPU time.

Answer

The domain with ID 2 uses paravirtualization.

Answer

Both Debian and Slack require xl commands to start running.

Question 2

Which of the following statements are true for full virtualization? (Choose TWO correct answers.)

Accepted Answer

Full virtualization does not require changes to the guest operating systems.

Accepted Answer

Full virtualization may be supported by special CPU extensions that provide better performance.

Answer

Full virtualization has no performance impact compared to a non-virtualized bare-metal installation on the same machine.

Answer

Full virtualization has a severe performance impact and should not be used in production environments.

Answer

Full virtualization always requires additional software components and cannot be done using Linux only.

Question 3

What action does the virsh restore command perform?

Accepted Answer

It restores a virtual machine from a state file.

Answer

It reverts a virtual machine, including its storage devices, to a previously saved state.

Answer

It wakes up a virtual machine that was hibernated by the operating system running inside the virtual machine.

Answer

It restores a virtual machine that was stopped by a kernel panic.

Question 4

How can data be shared between several virtual machines running on the same Linux-based host system?

Accepted Answer

By using a network file system or file transfer protocol.

Answer

By mounting other VM's file systems from /dev/virt-disks/remote/.

Answer

By default, Linux-based virtualization products provide full access to the host system to all virtual machines.

Answer

By setting up a ramdisk in one virtual machine and mounting it using its UUID in the other VMs.

Answer

By attaching the same virtual hard disk to all virtual machines and activating EXT4 sharing extensions on it.

Question 5

Which of the following statements are true regarding laaS computing instances? (Choose TWO correct answers.)

Accepted Answer

Creation of new instances can be automated by using scripts or APIs and service interfaces.

Accepted Answer

Instances may be created when needed and destroyed when they become obsolete.

Answer

The root file system of a computing instance is always persistent and can be accessed after the instance is destroyed.

Answer

Each and every user of an laaS cloud has exactly one computing instance.

Answer

Once created, computing instances are seldom deleted in order to ensure the accessibility of the instance's data.

Free 304-200 sample questions