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Some XYZ company is arranging for online aptitude tests. Draw
detailed E-R diagram for the same..
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Answer / Vashu Rajput
Creating an Entity-Relationship (E-R) diagram for an online aptitude test system requires defining various entities, attributes, and relationships between them. Here's a simple example of such a diagram:
1. TestTaker (UserID, Name, Email, Password, Address)
2. Test (TestID, Name, Description, DifficultyLevel, StartTime, EndTime)
3. Question (QuestionID, TestID, SequenceNo, QuestionText, AnswerA, AnswerB, AnswerC, CorrectAnswer)
4. Result (ResultID, UserID, TestID, Score, Date)
5. Relationships:
a) A user can take multiple tests (TestTaker --many-- Takes_Tests --> Test).
b) A test has multiple questions (Test --one-- Contains_Questions --> Question).
c) A user submits one result for each test they take (TestTaker --one-- Submits_Result --> Result, Test --one-- Has_Result --> Result).
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