If you answer all the questions correctly in this first category (heaviest weightings), then you will pass Salesforce app builder exam.
Business Logic and Process Automation (27%) [17 questions]
Data Modeling and Management (20%) [12 questions]
User Interface (14%) [9 questions]
Security (10%) [6 questions]
After that, concentrate on understanding the lower weighted objectives. There will be only 2-4 questions on each objective for the following:
App Deployment (8%) [5 questions]
Salesforce Fundamentals (8%) [5 questions]
Reporting (5%) [3 questions]
Mobile (5%) [3 questions]
Social (3%) [2 questions]
If you are preparing for Salesforce app builder exam, I recommend this Salesforce Training Course by Intellipaat.
Also, check out this video on Salesforce: