ACD300 Exam Questions

Not sure what you are looking for, but Kunal's blog post is a good source.

https://kunalsharda.com/2021/06/18/appian-certification-program/

What exactly do you want to know?
Recently, Appian changed its vendor to ProctorU.
The ACD300 seems to be deprecated





Everything properly mentioned here : https://community.appian.com/learn/certifications#prep

The exam code for Appian Lead Developer Certification is ACD301. Here is a page you can refer to, to understand the objectives, expectations as well as topics/resources to clear the exam. All the best!