Q. What action does ⋈ operator perform in relational algebra

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Q. What does the “x” operator do in relational algebra?

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Q. An attribute is a __________ in a relation.

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Q. What is the method of specifying a primary key in a schema description?

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Q. Statement 1: A tuple is a row in a relation
Statement 2: Existence of multiple foreign keys in a same relation is possible

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Q. Choose the option that correctly explains in words, the function of the following relational algebra expression:
σyear≥2009 (book ⋈ borrow)

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Q. State true or false: If a relation consists of a foreign key, then it is called a referenced relation of the foreign key dependency.

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Q. Which of the following is not a feature of a good relational design?

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Q. The dependency rules specified by the database designer are known as _______

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Q. If the decomposition is unable to represent certain important facts about the relation, then such a decomposition is called as?

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Q. If the decomposition is able to represent all the facts about the relation then such a decomposition is called as?

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Q. A domain whose elements are indivisible is called as ______

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Q. If all the domains are atomic then the relational schema is in ________ normal form

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Q. State true or false: Composite attributes have non-atomic domains.

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Q. State true or false: Redundancy is desired in a relational schema

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Q. An instance of a relation that satisfies all real world constraints is known as?

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Q. If K → R then K is said to be the _______ of R

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Q. X → Y holds on a schema k(K) if?

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Q. X→ Y is trivial if?

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Q. Which of the following is not a condition for X→ Y in Boyce codd normal form?

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