Unit 20

What is the primary function of a hypervisor?

• To manage user accounts.

• To create and manage virtual machines.

• To manage network connections.

• To defragment the hard drive.

Answer explanation

The primary function of a hypervisor is to create and manage virtual machines, allowing multiple operating systems to run on a single physical machine. This is essential for virtualization in computing.

Which virtualization type runs directly on the host's hardware?

• Type 2 hypervisor.

• Type 1 hypervisor.

• Container virtualization.

• Application virtualization.

Answer explanation

A Type 1 hypervisor runs directly on the host's hardware, allowing for better performance and resource management. In contrast, a Type 2 hypervisor runs on top of an operating system, making Type 1 the correct choice for this question.

What is a virtual machine (VM)?

• A physical computer.

• A software emulation of a computer system.

• A network router.

• A printer.

Answer explanation

A virtual machine (VM) is a software emulation of a computer system, allowing multiple operating systems to run on a single physical machine. This distinguishes it from physical computers, network routers, and printers.

What is the purpose of a snapshot in virtualization?

• To increase network speed.

• To save the current state of a VM for later restoration.

• To encrypt data.

• To defragment the hard drive.

Answer explanation

The purpose of a snapshot in virtualization is to save the current state of a VM for later restoration. This allows users to revert to that state if needed, making it a crucial feature for data recovery and system management.

Which hardware component is crucial for virtualization performance?

• Printer.

• CPU with virtualization extensions.

• Monitor.

• Mouse.

Answer explanation

The CPU with virtualization extensions is essential for virtualization performance as it provides the necessary hardware support to efficiently run multiple virtual machines, enhancing speed and resource management.

Which Linux command is used to list files and directories?

• CD

• LS

• MKDIR

• RM

Answer explanation

The 'ls' command in Linux is used to list files and directories in the current working directory. Other options like 'cd', 'mkdir', and 'rm' serve different purposes such as changing directories, creating directories, and removing files, respectively.

What does the sudo command do in Linux?

• Lists system users.

• Executes a command with root privileges.

• Deletes a file.

• Changes the current directory.

Answer explanation

The sudo command allows a permitted user to execute a command as the superuser or another user, providing root privileges necessary for administrative tasks. This makes it the correct choice.

Which Linux command is used to change the current directory?

• LS

• RM

• CD

• MKDIR

Answer explanation

The 'CD' command in Linux stands for 'change directory'. It is used to navigate between different directories in the file system, making it the correct choice for changing the current directory.

What is the purpose of the apt-get command in Debian-based Linux distributions?

• To manage user accounts.

• To install and manage software packages.

• To manage network connections.

• To defragment the hard drive.

Answer explanation

The apt-get command is used in Debian-based Linux distributions to install and manage software packages, making it essential for software management.

Which Linux command is used to create a new directory?

• LS

• RM

• CD

• MKDIR

Answer explanation

The command 'MKDIR' is used in Linux to create a new directory. The other options serve different purposes: 'LS' lists files, 'RM' removes files, and 'CD' changes directories.