If you are planning for ISTQB foundation level exam following details will be helpful for you:

http://www.istqb.org/downloads/viewcategory/16.html

Reference Book: FOUNDATIONS OF SOFTWARE TESTING ISTQB CERTIFICATION Dorothy Graham
https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CCsQFjAA&url=http%3A%2F%2Fapi.ning.com%2Ffiles%2F3loaqsYd*X79APGpzKjrwfsYnULTkvQVVy1NG4uHYXDVvODL7V7BO90iU4gcu-8x-AHaSXc2gZd3Hvn3Pu5**1H8XXmxIIIZ%2FRexBlack_istqb_Material.pdf&ei=WGMvUsqOHeL9iAf0rYHIAw&usg=AFQjCNH3_iTce2eXvY9pqueoDc5ziJuAxA&sig2=mM3Mxr0aJpSdImmuQMwelA&bvm=bv.51773540,d.aGc


Sample questions and study material:
http://www.softwaretestinggenius.com/full-study-material-for-istqb-foundation-to-all-3-advanced-level-certification-exams

Tips: Foundation level exam is typically based on the syllabus. Please try to cover the syllabus completely. Do solve questions on test design techniques, test coverage etc.

Do post your query for any clarification on the same or if you want explanation on any topic related to istqb syllabus.

All the very best for your exam.