1.   What is kernel?

Ans: Kernel is central part of an operating system that manages operations of computer and hardware. It basically manages operations of memory and CPU.

2.   Is Linux an operating system or a kernel?

Ans: Linux is a kernel. Its a part of a complete operating system.

3.   Is Linux Operating System Immune to Malware?

Ans: No, but Linux is well protected and secure than Windows.