The hash address space in static hashing is not always the same.

Restriction of_ from the basic relational model has been removed in the nested relational model.

Consider the schema R = (ABCD) and the functional dependencies A -> B, B -> C, C -> D and D -> A. Let R = (R1 and R2) be a decomposition, such that R1 {'1 R2 = cp. The decomposition is in .

Which of the following statements about normal forms is/are true?

____ yields better performance.

________ involves standardizing the format of data retrieved from different systems.

Suppose there are two relations: R1 and R2. If C1 and C2 are the selection conditions, and A1 and A2 are the attributes of the relation R1, then which of the given query transformations are correct? 1. 0C1 (0C1 (R1)) -> 0C2 (0C2 (R1)) 2. 0C1 (nA1 (R1)) -> nAl (0C1 (R1)) 3. 0C1 (R1 U R2) -> 0C1 (R1) U 0C1 (R2)

Which attributes is represented by the entity-relationship (E-R) diagram given in the image?

A database table must have only one primary key and one super key.

Which one of the given options is not a component of a storage manager in a database management system?

Which of the following levels of a data storage virtualization technology involves block-level striping with distributed parity?