Briefly explain the three types of relationships between entities.

Explain the difference between Entity, Relationship, and Attribute.

Write the seven major activities of System Implementation and Maintenance.

Write the four major activities of the process of maintaining Information Systems.

Write the types of Software Application Testing.

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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