In a __________, the system makes repeated requests for tuples from the operation at the top of the pipeline.
A. Demand-driven pipeline
B. Producer-driven pipeline
C. Demand pipeline
D. All of the mentioned
Answer:A
In a __________, the system makes repeated requests for tuples from the operation at the top of the pipeline.
A. Demand-driven pipeline B. Producer-driven pipeline C. Demand pipeline D. All of the mentioned
Explanation: Each time that an operation receives a request for tuples, it computes the next tuple (or tuples) to be returned, and then returns that tuple .