How Linux (or any other operating system) is used depends on what the user wishes to do.
No. Apple uses their own operating system. Linux is used by the cool people
A Linux distribution, known as distro or flavor, is an operating system that uses the Linux Kernel. I think the most common one is Ubuntu.
A typical shared Linux rack has a variety of prices. The price depends on the qualitlily of the one you get, which brand you get, sometimes you pay for the brand. Price also depends on how many functions it has but a typical one cost 395 dollars.
No. Hybrid implies that there is a mix with something else. Fedora uses only the Linux kernel.
India government
True.
"The linux computer that is the best for your situation is the one that uses Linux. I would recommend going to a place that sells computers, like Best Buy to find out."
Kindle Fire HDs use a customized version of Android, which is a mobile operating system running on the Linux kernel with a non-GNU userland.
Linux is used world wide, on many different systems, for many different purposes, and there is no country that "usually" uses this operating system. China, due only to the fact that there are more people in China. No single country is necessarily the "major" user of Linux.
4 By default. Expandable up to 36.
Yes you can. Ubuntu's WUBI uses the Windows bootloader (NTLDR) to boot Linux. It also uses the Windows filesystem (NTFS). This, however, is not the traditional way to do things. The traditional way to dual-boot Linux and Windows is to use a generic bootloader such as Grub to boot both Windows and Linux.
The Windows Subsystem for Linux (WSL) is a feature of Windows 10 and later. It allows users to run programs compiled for Linux on Windows without dual-booting or using a traditional hypervisor like VMware / VirtualBox. There are two implementations of WSL available: WSL1 (the original implementation) emulates a Linux kernel. It uses less RAM than WSL2, but is incompatible with certain programs. WSL2 runs a real Linux kernel in a simplified version of Hyper-V. Because it uses a real Linux kernel, it is compatible with more applications, but it also uses more RAM.