Virtual Machines 02

A ​ (a)   might run software that allows other ​ (b)   to behave as if it were running on a ​ (c)   : this is called a ​ (d)   or VM. A VM can be configured to replicate any combination of ​ (e)   so that the software running on it works as if it were accessing certain devices, even if they don't exist.

• host system

• software

• hardware system

• virtual machine

• hardware

• private system

• video game system

• web service

• virtual microsystem

• potato

Answer explanation

A host system runs software that allows other software to behave like it's on a virtual machine (VM). The VM can simulate hardware, enabling software to function as if it accesses specific devices, even if they are not present.

Virtual machines can fulfil many roles, including:

​ (a)   : A VM can be created to allow the installation of one operating system within another operating system.

​ (b)   : Some older software might not run on newer systems. A VM could emulate an older system, on which the user could run the older software.

​ (c)   : This provides the opportunity to run software that could potentially be damaging, such as malware or early versions of software that need to be analysed.

• Running alternative operating systems

• Supporting incompatible software

• Creating a test system

• Legacy OS

• Legacy operating systems

Answer explanation

Virtual machines can run alternative operating systems, support incompatible software, and create test systems. This allows users to install one OS within another, emulate older systems, and safely analyze potentially harmful software.

Virtual machines can fulfil many roles, including:

​ (a)   : A VM can be created to allow the installation of one operating system within another operating system.

​ (b)   : Some older software might not run on newer systems. A VM could emulate an older system, on which the user could run the older software.

​ (c)   : This provides the opportunity to run software that could potentially be damaging, such as malware or early versions of software that need to be analysed.

• Running alternative operating systems

• Supporting incompatible software

• Creating a test system

• Legacy OS

• Legacy operating systems

Answer explanation

Virtual machines can run alternative operating systems, support incompatible software, and create test systems. This allows users to install one OS within another, emulate older systems, and safely analyze potentially harmful software.

The 'hardware' of the VM only exists as a self-contained software process that is isolated from the actual host system.

• True

• False

• 😮

• What is VM?

Answer explanation

The statement is True because a Virtual Machine (VM) operates as a software-based emulation of hardware, running in isolation from the host system, allowing multiple VMs to coexist on a single physical machine.

virtual machine software that creates and runs virtual machines.

Answer explanation

The correct choice is 'Hypervisor' as it is the software that creates and runs virtual machines, allowing multiple operating systems to operate on a single physical machine.

the use of an app/device to imitate the behaviour of another program/device; for example, running an OS on a computer which is not normally compatible.

Answer explanation

The term 'Emulation' refers to using an app or device to mimic the behavior of another program or device, such as running an operating system on incompatible hardware. This makes 'Emulation' the correct choice.

Effectively, a virtual machine runs the existing OS (called the ​ (a)   operating system) and oversees the virtual hardware using a ​ (b)   operating system.

The ​ (c)   engine is referred to as a ​ (d)   ; this handles the virtual hardware (CPU, memory, HDD and other devices) and maps them to the physical ​ (e)   on the host computer

• host

• guest

• emulation

• hypervisor

• hardware

• software

• computer

• Windows

• Apple

• compilation

Answer explanation

In a virtual machine setup, the 'host' operating system runs on the physical hardware, while the 'guest' operating system runs within the virtual environment. The 'hypervisor' is the software that manages the virtual hardware, mapping it to the physical 'hardware'.