Consider a three-dimensional array defined as int A[2][2][3]. Calculate the number of elements in the array. Also, show the memory representation of the array in the row-major order and the column-major order.

Determine the normal Form of given Relation   R(ABCDE) FDs are : AB-> C, C-> D, D-> E, E-> A, D-> B

Write a query to create a view that finds the salesman who has the customer with the highest order at least 3 times on a day. 

Write a PL/SQL program to check whether a given number is positive, negative or zero.