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Just for reference we have re-branded BDM to DE (Data Engineering). Big data has been paired to hadoop and the current trends are moving away from hadoop based systems to serverless type setups.
That being said knowledge of big data is not 100% needed as Informatica takes care of the heavy lift but some knowledge of spark processing, mapreduce and the different stores involved in DE type processing would be extremely recommended. (hdfs,hive,s3, blob, spark.....).
The DE platform can be evaluated by customers but you would need to work with an Informatica Account manager to start the trail.