Hi
ISTQB Certification is good one, if you are new to testing world. It will give brief idea about all basic terms in testing.
The number of Question is 40 each carrying 1 marks. Pass percentage is 65% that is you have to score 26 or more than that.
Book "istqb_-foundations_of_software_testing" by Rex Black is prefered for this certification.Some in=mportant area in exam point of view are:
Principles of testing
Testing phases
Equivalence partitioning, state transition, Boundary value, Use case
Test Management. etc...