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 The software Development Life Cycle can be defined differently by organizations, it usually consists of the activities that work together to mature a concept into a software product. 

Big data challenges include capturing data, data storage, data analysis, search, sharing, transfer, visualization, querying, updating, information privacy and data source. 

Spark is an unified analytics engine for large scale data processing. It achieves high performance for both batch and streaming data  using a state-of-the-art DAG scheduler, a query optimizer.

The blockchain is an incorruptible digital ledger of economic transactions that can be programmed to record not just financial transactions but virtually everything of value.

Soft skills include, communication abilities, language skills, time management, teamwork and leadership traits. It characterize how a person interacts in his or her relationships with others.