UGC NET CSE | June 2019 | Part 2 | Question: 33

Question

With respect to relational algebra, which of the following operations are included from mathematical set theory?

1. Join
2. Intersection
3. Cartisian product
4. Project
   • A. i and iv
   • B. ii and iii
   • C. iii and iv
   • D. ii and iv

Comments

2

Intersection and Cartesian Product.

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b and c(intersection and cartesian are used from mathematical set theory)

Answer 1

Answer 2 b,c

Set theory contain operation e.g. union, intersection,set difference, Cartesian product, complementation and ,power set.

https://www.cs.sfu.ca/~ggbaker/zju/math/set-oper.html

https://en.m.wikipedia.org/wiki/Set_theory

Answer 2

ans- b  Intersection and​​​​​​ Cartisian product

Answer 3

intersection and cartesian product are taken from SET theory.