Q. If the system makes repeated requests for tuples from the operation at the top of the table, it is called as _________

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Q. If the operations do not wait to produce tuples, then it is called as _________

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Q. State true or false: Sorting is an inherently blocking operation

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Q. State true or false: Join is an inherently blocking operation

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Q. Which of the following techniques does not exist?

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Q. State true or false: Hybrid hash join is partially pipelined on the probe relation

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Q. The usage of two buffers, with one continuing execution of the algorithm while the other is written is called as __________

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Q. Which of the following functions does an iterator not provide

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Q. If on every legal database instant, the two expressions generate the same set of tuples, the expressions are called as

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Q. State true or false: Selection operations are commutative

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Q. Which of the following operations are associative

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Q. Which of the following set operations is not commutative?

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Q. State true or false: The projection operation does not distribute over the union operation

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Q. If no rule can be derived from any combination of others then the set of rules is said to be ________

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Q. Theta join operations are

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Q. Which of the following operations is associative

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Q. Which of the following set operations does the selection operation distribute over?

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Q. State true or false: Multiple equivalence rules can be used one after the other on a query

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Q. Which of the following information does the database system catalog store?

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Q. Most databases store the distribution of values for each attribute as a __________

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