MISY 5335 questions and answers graded A+ 2023/2024

MISY 5335Which of the following activities is not performed during the implementation phase of developing a database system? - correct answer Transforming the data model into a database design Which of the following would not be contained in a use case? A) Inputs provided to the system to perform a task B) A description of a task the user wants to perform C) A prototype of the system performing a given task D) Outputs generated by the system in performing a given task E) An activity scenario - correct answer C. A prototype of the system performing a given task The representation of the content, relationships, and constraints of the data needed to support the system requirements is the ________. - correct answer data model A use case can be used to perform which of the following tasks? A) Transform the data model into the database design B) Validate the data model C) Fill the database with data D) Implement business rules E) Develop applications - correct answer B A(n) ________ is a working demonstration of selected portions of the future system. - correct answer prototype ________ are descriptions of the ways users will employ the features and functions of the new information system. - correct answer Use cases The ________ is a representation of the content, relationships, and constraints of the data needed to support the system requirements. - correct answer data model Which of the following is not a source for user requirements during the requirements analysis stage of developing a database system? A) Referential integrity constraints B) User interviews C) Forms D) Use cases E) Business rules - correct answer A In the Entity-Relationship data model, all instances of an entity of a given type are grouped into ________. A) entity objects B) class objects C) entity classes D) identifiers E) entity attributes - correct answer C Which of the following is true about identifiers of entities? A) Identifiers must be unique. B) Identifiers are not normally used in a naming role. C) The value of an identifier may identify a set of entity instances. D) Identifiers may not be more than two attributes. E) An identifier in the E-R model is equivalent to a key in the relational model. - correct answer C Identifiers of an entity that are composed of two or more attributes are called ________ identifiers. - correct answer composite The number of entity classes involved in a relationship is known as the relationship's ________.