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Home›Explore Exams›NEB +2› Grade 12›Subjects›Computer Science (Grade 12)

GyanMul Prep · NEB +2 · Grade 12

Computer Science (Grade 12)

Everything on these tabs is Computer Science (Grade 12) only, within NEB +2 Grade 12.

Grade 12 subjects

Chapters Questions Practice Quizzes Past Papers Institution Papers Mock Tests Solved Questions Progress Gurubaa

Chapters›Keys, Relational Model and Normalisation

3

Chapter 3 of 26 · Computer Science (Grade 12)

Keys, Relational Model and Normalisation

8 topics
Board exam — Database Management System, 8 marks across 4 chapters
12 solved questions

The keys that make a row findable and a link trustworthy, and the normal forms that take redundancy out of a design one anomaly at a time.

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Topics

What the syllabus defines for this chapter

1Relation, tuple, attribute and domain
2Primary key, candidate key, super key, alternate key and composite key
3Foreign key and referential integrity
4Redundancy and the insertion, deletion and update anomalies
5Functional dependency and partial dependency
6First Normal Form, Second Normal Form and Third Normal Form
7Benefits of normalisation and when denormalisation is chosen
8Database security, integrity and the idea of a transaction

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