Big data refers to the large and complex data sets that are too difficult to process using traditional data processing techniques. Big data is characterized by the 3 Vs: volume, variety, and velocity. Big data is used in many applications, such as marketing analytics, fraud detection, and recommendation systems. Popular big data frameworks include Hadoop, Spark, and Kafka. Boxing Cross-platform development is a software development approach that involves creating applications that can run on multiple platforms, such as Windows, macOS, and Linux. Cross-platform development can help to reduce development time and costs, and improve reach. Popular cross-platform development platforms include React Native, Xamarin, and Flutter.