Expected Marketing Cloud Developer Exam Topics, as suggested by Salesforce :

• Module 1: Data Modeling: Configuration of account Contact model in Marketing Cloud is discussed. The topic also differentiates the different types and uses of data extensions in the Marketing Cloud. It also describes how contact records relate across channels. Lastly, the topic explains the Contact Delete process.
• Module 2: Programmatic Languages: Enhance your knowledge of AMPscript and SSJS language syntax and functions to cover this topic. It also discusses the usage of Marketing Cloud programming languages to implement standard development best practices. Moreover, the topic discusses the processing of Marketing Cloud handles AMPscript. The topic explains how to programmatically exclude a subscriber at email send time.
• Module 3: API: API objects, methods, and routes are discussed in this topic. You also encounter sub-topics of OAuth authentication flow and evaluation of the significance of response handling.
• Module 4: Data Management: It includes sub-topics such as configuring import activity, applying SQL, extracting data from Marketing Cloud, and managing data in Marketing Cloud. The topic also focuses on sub-topics of applying best practices for sending logs and describing the effects of the Contact delete process on data.
• Topic 5: Security: Different options that are used to secure data in Marketing Cloud are discussed in this topic. It also delves into sub-topics of best practices of security in the Marketing Cloud.