I'll be travelling to Austria and Prague at the end of the month from India. We are planning to carry a forex card and cash (euros). However, we are not sure about Prague, since the local currency is acceptable there. I read somewhere we need card to travel in local transports and forex card isn't useful there. Can anyone suggest the amount of cash and which card should I carry. I have been suggested a lot of different applications. I'll be staying in Austria for 8 days and 3 days Prague. Also, do we need an international credit to travel for security deposit in hotel?