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In the section relation which of the following is used as a foreign key?

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In the section relation which of the following is used as a foreign key? (a) Course_id (b) Course_id,sec_id (c) Room_number (d) Course_id,sec_id,room_number The question was posed to me during an online interview. My query is from Querying database part-1 DDL topic in chapter Database Systems Design and Implementation of Database Management Select the correct answer from above options Interview Questions and Answers, Database Interview Questions and Answers for Freshers and Experience

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Right choice is (a) Course_id Easiest explanation - Course_id is the only field which is present in the course relation.

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