Q. Which of the following is another name for weak entity?

View solution

Q. In E-R Diagram derived attribute are represented by

View solution

Q. An instance of relational schema R (A, B, C) has distinct values of A including NULL values. Which one of the following is true?

View solution

Q. In E-R Diagram relationship type is represented by

View solution

Q. In E-R diagram generalization is represented by

View solution

Q. Database supports _______ types of database schema's.

View solution

Q. Which of the following are valid types of Database Schema's ?

View solution

Q. Which of the following schema is present at highest level ?

View solution

Q. Map of concepts and their relationships is represented by __________ Schema.

View solution

Q. A map of entities and their attributes and relations is represented by ____________.

View solution

Q. Arrange the database Schema's in Appropriate order -

1. Logical Schema
2. Conceptual Level
3. Physical Level

View solution

Q. Schema Definition is written by _________.

View solution

Q. A rectangle represents which of the following in an ERD?

View solution

Q. An oval represents which of the following in an ERD?

View solution

Q. An entity name should be which of the following?

View solution

Q. An attribute name should be which of the following?

View solution

Q. A binary relationship cannot be which of the following?

View solution

Q. If there are two entities with a relationship between them, and one of the entities is completely dependent on the other, then which of the following must exist?

View solution

Q. A binary relationship is which of the following?

View solution

Q. When the minimum number of instances of an entity is one, you know which of the following?

View solution