Does it is going to cover Spark integration with various other technologies(reading data from data lake, diverse data sets, diverse real time streams, Snowflake and other NoSQL DBs and Apache Kafka)?
Are the code examples correct and working fine OOTB?
Spark can run on your laptop reading/writing data to flat-files locally, or it can run in cluster mode on various distributed platforms (HDFS, Hadoop, Kubernetes, Cassandra, ...), as well as being available as a service from major cloud providers like Google (Dataproc), Azure, Amazon.
So you can learn or experiment with Spark on your laptop, develop code there, then deploy the same code to run on a cluster in the cloud.
Databricks is the company behind Spark (as well as the proprietary Databricks data platform), so check out their website for tutorials and background info on Spark: