Practice Tests/Reference Guides for Salesforce Certified Development Lifecycle and Deployment Architect

I'm prepping for my Salesforce Certified Development Lifecycle and Deployment Architect. While I am about done with the trailhead attached to the cert, I was wondering what other resources people have used for this exam. Are there any practice exams? I checked out Focus on Force, and unless I missed something, I didn't see anything for this.

Any pointers on studying/the exam itself, are greatly appreciated.

Thanks!

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