Final answer:
Explains types of relationships, entity-relationship model, system implementation activities, maintaining information systems activities, and software application testing.
Explanation:
Types of Relationships:
Entity-Relationship (ER) Model: This model defines three types of relationships: one-to-one, one-to-many, and many-to-many. In a relational database, these relationships are satisfied through primary and foreign keys.
- Entity, Relationship, and Attribute: An entity represents a real-world object or concept, a relationship defines how entities interact, and an attribute describes properties of entities or relationships.
- Seven Major Activities of System Implementation and Maintenance: Planning, Analysis, Design, Implementation, Testing, Deployment, and Maintenance.
- Four Major Activities of Maintaining Information Systems: Backup and Restoration, Performance Monitoring, Security Management, and Change Management.
- Types of Software Application Testing: Unit Testing, Integration Testing, System Testing, Acceptance Testing, and Regression Testing.
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