Hello,
I'm a software professional who is new to Salesforce and want to take the 201/401 Certification. I do have 17 years of software experience in Java/JSP/OOP/SQL etc.. Would love to hear from the folks who have taken the test, as to roughly how long it took to prepare for the test for someone with my background? I plan to use trailhead to learn salesforce. I need a ball-park estimate , is it 1 month/4 months/6 months.

Thanks