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What is/are the function(s) that it implements a demand-driven pipeline by providing three basic functions

9. What is/are the function(s) that it implements a demand-driven pipeline by providing three basic functions.

1. open()
2. next()
3. close()
4. All of the above

Answer: D) All of the above

Explanation:

The function(s) that it implements a demand-driven pipeline by providing three basic functions:

1. open()
2. next()
3. close()