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Consider the following statements in respect of sets: 1. The union over the intersection of sets is distributive. 2. The complement of the union of two sets is equal to the intersection of their complements. 3. If the difference between the two sets is equal to the empty set, then the two sets must be equal. Which of the above statements are correct?
In an Entity-Relationship (ER) model, suppose ? is a many-to-one relationship from entity set E1 to entity set E2. Assume that E1 and E2 participate totally in ? and that the cardinality of E1 is greater than the cardinality of E2. Which one of the following is true about ??
There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called
If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has
Consider a directed line(->) from the relationship set advisor to both entity sets instructor and student. This indicates _________ cardinality
An entity in A is associated with at most one entity in B, and an entity in B is associated with at most one entity in A.This is called as
A manufacturer of TV wants to make a profit of Tk. 300,000 on sale of 200 TV sets. It costs Tk. 10,000 each to make the first 100 TV sets and Tk. 7,500 each to make TV sets after the first 100 sets. What should be the selling price of each TV sets in Taka?
The relationship associating the weak entity sets with the identifying entity set is called as ________
The schema for the relationship set linking a weak entity set to its corresponding strong entity set is redundant.
State true or false: The schema for the relationship set linking a weak entity set to its corresponding strong entity set is redundant.