quiz

ER Model in DBMS

1. How are entities represented in an ER diagram?

  • A) Rectangles
  • B) Ellipses
  • C) Diamond-shaped boxes
  • D) Double ellipses
A) Rectangles Explanation

2. What is the primary function of using the Entity-Relationship (ER) Model in a database system?

  • A) To visualize hardware configurations
  • B) To manage transaction schedules
  • C) To graphically represent database structures
  • D) To optimize SQL query performance
C) To graphically represent database structures Explanation

3. What symbol is used to represent attributes in an ER diagram?

  • A) Rectangles
  • B) Ellipses
  • C) Diamond-shaped boxes
  • D) Double ellipses  
B) Ellipses Explanation

4. Which term describes an entity that does not depend on any other entity in the schema and possesses a primary key?

  • A) Weak entity
  • B) Strong entity
  • C) Composite entity
  • D) Subtype Entity
B) Strong entity Explanation

5. How are multivalued attributes depicted in an ER diagram?

  • A) Double ellipses
  • B) Dashed ellipses
  • C) Rectangles
  • D) Diamond-shaped boxes
A) Double ellipses Explanation

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