Q: Which of the following is NOT a basic element of all versions of the E-R model?
A: Primary keys
Q: In an E-R, Y is the dominant entity and X is a subordinate entity. Then which of the following is incorrect?
A: operationally, If X is deleted, so is Y
Q: Attributes that are not present in the whole DBMS but can be formed using other attributes are
A: Derived Attribute
Q: E-R modeling technique is a:
A: Top-down approach
Q: In an E-R model, Oval represents
A: attributes
Q: Choose the most appropriate choice with respect to conceptual design.
A: Conceptual design involves modelling the data requirements independent of the DBMS, operating system and the hardware
Q: Which type of entity has its relationship to another entity determined by an attribute in that other entity called a
A: Subtype entity
Q: In E-R modeling, which symbol is used to set up relationships between two or more entities?
A: Diamond
Q: In an E-R diagram, attributes are represented by
A: ellipse
Q: The ER Model includes additional concepts like :
A: All of the listed options