To prepare for the exam, Salesforce.com Certified Force.com Developer Summer ‘14 Certification Maintenance,

Access the Release Training here:
http://www.salesforce.com/customer-resources/releases/summer14/release-training.jsp

Download the Release Notes here:

https://na1.salesforce.com/help/pdfs/en/salesforce_summer14_release_notes.pdf

You will have 3 attempts to pass the exam. There are 5 exam questions and the passing score is 80%.

Last Date:
October 31, 2014, prior to the next release (Winter ‘15).

Please visit the schedule page for exact details: http://certification.salesforce.com/schedules.

Cheers!!!