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SingaporeComputer ScienceQuick questions
Data, Information and Databases
Quick questions on Entity-relationship modelling explained: H2 Computing
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is cardinality?Show answer
Cardinality says how many of one entity relate to how many of another:
What is q1?Show answer
State the cardinality between a Country and its Cities (each city is in one country). [1 mark]
What is q2?Show answer
How is a many-to-many relationship implemented in a relational database? [2 marks]
What is q3?Show answer
In a one-to-many relationship between Author and Book, where does the foreign key belong? [1 mark]
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