Kristal.AI Software Developer interview questions

A mini project on pizza delivery system was asked to design . programs : 1) WA system to add records like stocks and their info like name , symbol , price etc . An option to query the records and implement autocomplete type search so that all records matching the search criteria should be returned . 2) A program to design a data structure nStacks , n number of Stacks having an overall fixed capacity of k elements . It should have operations like push(int element,int stackNumber) and pop(int stackNumber) , which should do respective operation on the given stack number . Underlying data structure to store elements should be only one array .