ACTIVITY WEEK 11

In this week , there are midterm exam . This exam covered 6 chapters. There are from chapter 1 to chapter 6. Mr Zaliman gave us 1hour and half to answer the questions.

Concisely define each of the following key data-modeling terms: conceptual data model, entity-relationship diagram, entity type, entity instance, attribute, candidate key, multivalued attribute, relationship, degree, cardinality, and associative entity.

Ask the right kinds of questions to determine data requirements for an information system.

Draw an entity-relationship (E-R) diagram to represent common business situations.

Explain the role of conceptual data modeling in the overall analysis and design of an information system.

Distinguish between unary, binary, and ternary relationships, and give an example of each.