What is shell in Oracle PL SQL Interview Questions And Answers For Experience & Freshers | Interview Preparation
User types command on terminal. Shell will read command provided by the user.
Shell will check whether command is valid or not and also command properly used or not.
If everything is proper then shell converts that command into kernel understandable form and handover that command to kernel. kernel is responsible to execute that command with help of hardware.
Shell acts as interface between user and kernel. kernel acts as a interface between shell and hardware. Shell plus kernel is operating system.
Types of Shell:
1) Bourne Shell
2) BASH Shell
3) Korn Shell
4) CShell
5) TShell
6) ZShell
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