Entity Relationship Model - Chapterwise Database Management System Objective Questions and Answers

Questions

6 Choose the most appropriate choice with respect to conceptual design.

A Conceptual design is a documentation technique. Once the relation schemes are defined one can draw E-R diagrams from the relation schemes for documentation

B Conceptual design needs data volumn and processing frequencies to determine the size of the database

C Output of any conceptual design is an E-R diagram

D Conceptual design involves modeling the data requirements independent of the DBMS, operating system and the hardware.

View Answer Comment

Answer: Option [D]

7 E-R modeling technique is a :

A Top-down approach

B Bottom-up approach

C Left-right approach

D None of the above

View Answer Comment

Answer: Option [A]

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8 In an E-R model Oval represents :

A entity sets

B attributes

C relationships

D links

View Answer Comment

Answer: Option [B]

9 The number of entities to which another entity can be associated via a relationship set is expressed as :

A Entity

B Cardinality

C Schema

D Attributes

View Answer Comment

Answer: Option [B]

10 Every weak entity set can be converted to a strong entity set by :

A Simply adding appropriate attribute

B Using generalization

C Using aggregation

D Repeating the entity set several times

View Answer Comment

Answer: Option [B]

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