Question: Answer the follow questions: 1 . Explain the relationship between context diagram and level 0 . 2 . What circumstances make us use the packaged

Answer the follow questions:
1. Explain the relationship between context diagram and level 0.
2. What circumstances make us use the packaged software?
3.W ??
4. What are the basic functions for any main software systems?
5. What is meant by a DFD semantic error? Provide an example.

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