e of 6 Wednesday. October 19, 2016 Which of the following is a Boolean expro hed

Question

e of 6 Wednesday. October 19, 2016 Which of the following is a Boolean expro heduled in at least one of the three perlods?" that evaluntes to 1 if and only if A is sC (A A2+A3) 24. (4 points) It is possible to construct a new relatio a relation as a composition of a function A True B. False and 25. (4 points) (true/false) A digraph is a Disectedl Graph A. False B. True 26. (4 points) Which is NOT a property of a partial ordering relation? A. transitive B) symmetric C. anti-symmetric D. reflexive 27. (4 points) The table below shows a small database whose records correspond to courses offered in a university ourse Number ourse Title nstructor Semester S1 CS10 CS15 CS20 CS28 n Intro to Computer Science Introduction to Programming Programming Methodology I Programming Methodology II Discrete Mathematics Data Structures OOK Cook Tajil Faroughi Fletter Summer Fall Fall Spring Spring Spring Nguyen Give a key for this database table. A Course Title Course Number C. Instructor D. Semester urjective), g : N x N N with 28. (4 points) (True or False) This is function is onto (s g(n, m) = 2n-4m A. True False

Explanation / Answer

27- both course number and course title can behave as the key for this database sample because a primary key is always unique and not null. And if we talk about generic database then, course number will always beahve as the primary key beacuse it is always unique.

Else all other answers are correct.

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