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Database Systems Practice Test 137

Relational Databases Quiz Questions and Answers PDF - 137

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Relational Databases Quiz Questions PDF Download: Test 137

MCQ 681: Each record type defines a fixed number of

A) Variables
B) Fields
C) Attributes
D) Unique names

MCQ 682: The names of the attributes in the result are derived from the names of the attributes in the relations in the

A) From clause
B) Define clause
C) Select clause
D) Where clause

MCQ 683: In E-R diagrams, the relationship set associating the weak entity set to the identifying strong entity set is represented by

A) Diamond
B) Double Diamond
C) Rectangle
D) Double triangle

MCQ 684: The contents of a relation instance may change with time as the relation

A) Domain
B) Time
C) Updated
D) Retrieved

MCQ 685: Process of switching from finer-granularity data to a coarser granularity can take place by means of

A) Functions
B) Aggregation
C) Integration
D) Substitution

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