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 (a). Find out the Cartesian product (D1 × D2 × D3) of the given pair of sets.                                      Marks: 5


      D1 => Set of first two Vowels                  =     D =  {A, E}   

      D2 => Set of three country codes            =     D2 =  {213,54, 994} 

      D3 => Set of first three odd numbers       =     D3 =  {1, 3, 5}

(b). Keeping in view the previous assignment scenario lets suppose there is a simple database for some entities in CMS  might contain relations for Student, Class, Faculty and Enrollment. The relation schema would be written as:


Student (Stu_Id, LastName, FirstName, Major, Credits)

Faculty (Fac_Id, department, rank, name)

Class (Class_No, Fac_Id, Schedule, room)

Enrollment (Stu_Id, Class_No, Grade)


Using this sample relational schema, identify foreign key in Class relation and Composite primary key in Enrollment relation.                                                                                                                                     Marks: 5

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Replies to This Discussion

where 's 2nd quiz solution

complete and correct solution is here


question 1 is simple one set of ordered triples  

second question

you have to mention PK, FK and composite key

yaar in second question .... We have to find out the PK and FK and composite key...so whats the solution


class relation ma fac_id foreign key ha


enrollement relation ma stud_Id composite primary key ha





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