What is difference between MCAD and MCPD

Question

if any one has any idea then tell me What is difference between MCAD and MCPD two exam ?

 

which one has good value ?

 

how do i know on which version question will be asked in MCAD and MCPD two exam ?

 

from where to buy the books and resource for MCAD and MCPD two exam as a result i will get pass mark.

 

please some one share knowledge who recently qualify these exams like how to prepare to pass these kind of exam.

 

thanks a lot.