Question d’entretien chez TCS

Diff between abstraction and interface Polymorphism overloading Sql query Diff between foreign key and primary key Diff between unique key and primary key What is join What is subquery

Question d'entrevue chez TCS: Diff between abstraction and interface Polymorphism overloading Sql query Diff between foreign key and primary key Diff between unique key and primary key What is join What is subquery | Glassdoor