Expected LookML-Developer Exam Topics, as suggested by Google :

• Module 1: Analyze data models and business requirements to create LookML objects/ Determine how to join views into Explores
• Module 2: Build project-based needs (e.g., data sources, replication, mock reports provided by clients)/ Determine which views and tables to use
• Module 3: Ensure existing contents are working (e.g., use Content Validator, audit, search for errors)/ Maintain the health of LookML projects in a given scenario
• Module 4: Decide which Looker features to use to implement data security/ Apply procedural concepts to implement data security requirements
• Module 5: Optimize SQLs for cost or efficiency based on business requirements/ Determine why specific queries return results by looking at the generated SQL in SQL Runner
• Topic 6: Reconcile merge conflicts with other developer branches/ Implement version control based on given requirements
• Module 7: Determine appropriate caching settings based on data warehouse’s update frequency/ Apply procedural concepts to implement persistent derived tables and caching policies based on requirements
• Module 8: Apply procedural concepts to evaluate the performance of queries and reports/ Apply procedural concepts to optimize queries and reports for performance
• Module 9: Determine which additional features to use to refine data/ Analyze business requirements and determine LookML code implementation to meet requirements
• Module 10: Modify existing project structure to account for new reporting needs/ Design new LookML dimensions or measures with given requirements