A Level Computer Science OCR Practice Exam

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What does Entity Relationship Modelling (ERM) primarily focus on?

The development of user interfaces
The production of a detailed data model
The optimization of query execution speeds
The implementation of security measures

The correct answer is: The production of a detailed data model

Entity Relationship Modelling (ERM) primarily focuses on creating a detailed data model that visually represents the structure of a database. It outlines the entities within a system and the relationships between those entities. This involves identifying key entities, their attributes, and how they interact, which aids in designing an efficient database schema. The end result is a clear diagram that communicates the organization of data, facilitating a better understanding of the information system and guiding developers in the database creation process. The other options, while important in their own domains, do not align with the main purpose of ERM. User interfaces, query optimization, and security measures focus on aspects like user interaction, performance efficiency, and data protection, which are outside the realm of what ERM directly addresses.