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Question 34Asked in DSSSB TGT Computer Science (Technical), 8 Aug 2021, Shift 2

Which of the following symbol represent one to one cardinality relationship in Entity relationship diagram?

  1. A─○|─ (a line with a circle and one bar)
  2. B─|─ (a line with a single bar)
  3. C─||─ (a line with a double bar)
  4. D─|<─ (a line with a bar and a crow's foot)
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Correct answer: (B) ─|─ (a line with a single bar)

Explanation

In crow's-foot notation, a single bar means "one". A line with a single bar marks a one-to-one link. A crow's foot means "many", and a circle means "zero" (optional).

From DSSSB TGT Computer Science PYQ (Technical), 8 Aug 2021, Shift 2

This is question 34 of DSSSB TGT Computer Science PYQ (Technical), 8 Aug 2021, Shift 2. 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.