A kernel is a generic term to represent the core or base of an operating system. Since the operating systems mentioned here are very different, so are the kernels. They are written differently with different goals in mind.
Having said that, no matter what kernel or operating system you are talking about a kernel program shares the same goals no matter what the vendor is. A kernel has to be able to handle booting the system, running tasks, managing resources, and other tasks as required by an operating system.
The kernel is also the resident part of the operating system; it never gets swapped out of memory. Since its function is so important it has to be memory resident all the time.
what are similarities and differences between linux and unix?
Since there isn't a UNIX 95 or UNIX 98 per se, I think you are referring to Windows 95 or Windows 98..
unix is a multiuser operating system but widows is a single user operating system.
tHE QUESTION WAS WHAT IS THE DIFFERENCE BETEEN unix and windows 7, but i did not get the appropriate answer.
They are both administrator accounts and have privileges to do anything on the system.
UNIX is a command-based OS. In contrast, Windows is a menu-based OS.
No difference, really. Unix is an OS (Operating System)
If by 'Microsoft' you mean 'Windows', then the difference is the platform.
Both platforms are ASCII platforms, but the difference is the line termination character. In Windows, there is a two character sequence to denote the end of the line (CR/LF sequence, 0D0A) For Unix, the line termination character is the newline character (0A), to denote the end of the text line.
Unix is an operating system, Java is a language.
Windows in an operating system developed by Microsoft, which owns the patents upon which Widows is based. Widows is the grand-product of DOS, developed by Mr. Gates. Unix is an operating system developed by AT&T and many other companies. Some parts are typewritten or patented, but the main kinds of Unix are open source.
If you are asking about the graphical interface, windows XP comes with just 1 interface, and it can be customized to a point, but that is somewhat limited. Unix comes with multiple graphical desktop managers, not just one. Users can pick and choose which environment is best for them. With Windows, the choice is already made for the user. Handling of icons and desktops are very different in Unix and Windows. The list would be too long to detail in this answer.