If the system makes repeated requests for tuples from the operation at the top of the table, it is called as _________(a) Demand driven pipeline(b) Producer driven pipeline(c) Query driven pipeline(d) None of the mentionedI had been asked this question in quiz.My doubt stems from Evaluation of Expressions topic in chapter Query Processing and Optimization of RDBMS

If the system makes repeated requests for tuples from the operation at

1.	If the system makes repeated requests for tuples from the operation at the top of the table, it is called as _________(a) Demand driven pipeline(b) Producer driven pipeline(c) Query driven pipeline(d) None of the mentionedI had been asked this question in quiz.My doubt stems from Evaluation of Expressions topic in chapter Query Processing and Optimization of RDBMS
Answer» CORRECT option is (a) Demand driven pipeline To explain: If the SYSTEM makes REPEATED requests for tuples from the operation at the top of the table, it is called as demand driven pipeline. Each time an operation receives a request for tuples, it COMPUTES the next TUPLE or tuples to be returned and then returns that tuple.

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