Its cover all the apex topics. The topics are listed beliw
-Apex Syntax and Semantics
-Apex Triggers
-Data Manipulation Language (DML) Operations
-Salesforce Object Query Language (SOQL)
-Salesforce Object Search Language (SOSL)
-Exception Handling
-Governor limits
-Apex classes
-Synchronous and Asynchronous Apex
-Apex Testing
-Integration
