Can I deploy my application on Jakarta Tomcat Server. The
number of persons hitting the server are 100 at a time.
Is it scalable. Please let me know urgently.
Tomcat is not an "application server" but a "web container", meaning that it's capable of running J2EE-compliant "Web applications" consisting of Servlets and JSPs, not "Enterprise applications", which consist of "Web applications", EJBs, J2CA connectors, etc.
I have the impression that Tomcat scales well to a hundred simultaneous users. Just make sure that you're application scales as well.