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Question 178Asked in DSSSB TGT Computer Science, 7 Feb 2024, Shift 2 (12:30 PM)

Which of the following term of ER model (Entity – Relationship) is corresponding to

Which of the following term of ER model (Entity – Relationship) is corresponding to the foreign key (or relationship relation) in the relational model of database?
  1. AComposite attribute
  2. BEntity type
  3. C1 : 1 (one to one) or 1 : N (one to many) relationship type
  4. DM : N (many to many) relationship type
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Correct answer: (C) 1 : 1 (one to one) or 1 : N (one to many) relationship type

Explanation

In ER-to-relational mapping, a 1:1 or 1:N relationship type corresponds to a foreign key (or a relationship relation) in the relational model.

From DSSSB TGT Computer Science PYQ, 7 Feb 2024, Shift 2 (12:30 PM)

This is question 178 of DSSSB TGT Computer Science PYQ, 7 Feb 2024, Shift 2 (12:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.