Pros
You'll learn Java if you are given java development. But in that too old technologies are used. Other than that no pros.
Cons
I joined TCS as an experienced professional and working since last one year in this project. The points mentioned below are solely for TCS-SBI project. 1. No AC/ worst cafeteria/ stinking toilets. 2. TCS higher management thinks its there home and Junior employees are their servants. 3. No corporate ethics. 4. Mental harassment at every point of time. 5. Bad politics, no matter how good you are working, you can be a victim of politics if you are not a good bootlicker. 6. Resources don't have backups in many teams. They can't go for leave. They might cancel the leave even if it was informed 4 months earlier and they failed to arrange any resource. 7. HRs are deaf and dumb dolls. They always favour senior. No matter how wrong he/she is. 8. Work environment is worst. Alternate working Saturdays. Sometimes you need to work continues Saturdays. No work life balance. EVERYTHING IN THIS PROJECT IS WORST. What is more disappointing is everybody around TCS (including Higher Management of TCS) know about this project. But nobody takes any step.