Apache Spark is one tough software to crack, as is the case with Big Data technologies, but if you are well versed with the concepts, or are learning Big Data processing, here is a list of some good pet projects to learn Apache Spark:
- Movie Recommendation System
- Twitter API Integration for Tweet analysis
- Data Exploration using Spark SQL, etc.
If you are a novice to this field or interested in breaking into this domain, then I would recommend you to enroll in a good Spark certification course from Intellipaat, which would offer you with the best industry-grade course along with projects to help enhance your job prospects.