Is it possible to disable client side script in validators?

Yes. Simply EnableClientScript = false.

How to disable client side script in validators?

Set “EnableClientScript” to false

Which Javascript file is referenced for validating the validators at the client side?

WebUIValidation.js Javascript file installed at “aspnet_client” roots IIS directory is used to validate the validation controls at the client side.

Using which property you can check on the server whether validators controls are satisfied or not?

The answer is Page.IsValid . Always ensure that you check Page.IsValid before doing any kind of operation when working with Validator Controls.

What is the name of the base class, from which all the validators controls of ASP.NET is derived?

All the ASP.NET validation controls are derived from BaseValidator Class except Validation Summary Control.