In real time applications where we use shell scripting and how it differ from other scripting languages?

Real time applications? As in deterministic, schedule-constrained applications?

Those questions aside (but need answers), the standard system shell (such as bash on Linux) should be a strictly interpreted language which can be deterministic (all other issues being equal). Other scripting languages such as perl, python, javascript, et al are what I would call semi-compiled languages with garbage collection (memory management) and such, and as such, they are not deterministic and able to guarantee meeting real-time deadlines.

Terminology in tech fields is critical. So again, what do YOU mean by "real time"?

Thank you i will rectify my terminology in tech fields.

In google which scripting language is used?

Advantages:

To improve the regularly conducted operations
To run series of instructions as only one command
Easy to use
Portable (It can be implemented in any Unix-like operating-system without any modifications)