python:- what is OOPs in python, what is cunstructor, create a student class , yield operator, decorator , lambda functions , write a program to add two numbers by using normal function and also by using lambda function, list vs tuples vs dict vs set , what do you mean by immutability . SQL : what is sql , desribe sql commands , create a table student having student id of int type as primary key gender as putting constraints M/F first name last name class and then they send a link in the chat box after opening the link you will be redirected to his query page where a you have to perform many task as they want, like join two tables , get names starting with R ,count number of employees having same salary, what is view , why need to create view , how to create view , data types , difference b/w primary key and unique key , write a sql query to get result from three tables . It was really amazing to interact with them as he was very polite . I performed very well and wishd to get selection mail but I don't know why I get regret mail. May be I am deserving a better organization. Thanks for reading. For hint my name is(rv ==> decode this you will get my name for sure) and hit like if my information is helpful .