This volume constitutes the refereed proceedings of the workshops held at the 35th International Conference on Database and Expert Systems Applications, DEXA 2024, which took place in Naples, Italy, in August 2024. The papers included in this book stem from the following workshops: - 9th International Workshop on Cyber-Security and Functional Safety inCyber-Physical Systems (IWCFS 2024), - 4th International Workshop on AI SystemEngineering: Math, Modelling and Software (AISys 2024), - 2nd InternationalWorkshop on Certainty in Uncertainty: Exploring Probabilistic Approaches in AI (CIU2024) The 10 full papers and 5 short papers were thoroughly reviewed and selected from a total of 24 submissions. They were organized in topical sections as follows: Cyber-security and functional safety in cyber-physical systems; AI system engineering: math, modelling, and software; certainty in uncertainty: exploring probabilistic approaches in AI. .