Salesforce.com in no longer offering dev 401 certification from Sep 14. Instead of dev 401 you can go for a Salesforce Platform App Builder certification this is completely for a configuration role which involves no development. If you are interested in Developer certification and you have atleast 1-2 years of development experience on force.com platform you can give Salesforce Platform Developer I certification. This certification is on Apex, Visualforce and Lightning skills mostly.
App Builder Certification:
App Builder Study Guide:
Platform Developer Certifications:
Platform Developer study Guide:
Here are some sample questions for App Builder Exam:
What To and How to study for App Builder:
Salesforce Certified Platform App Builder Exam