What is polymorphism and it's type What is inheritance and it's type What is primary key and how can we compare both customer and product by which key.

Question

Accepted Answer

Polymorphism and inheritance are OOP concepts. Primary key is a unique identifier for a database table.

Polymorphism is the ability of an object to take on many forms. Types: compile-time and runtime.
Inheritance is the process of creating a new class from an existing class. Types: single, multiple, multilevel, hierarchical.
Primary key is a unique identifier for a database table. We can compare customer and product by using a common key like customer ID or product ID.

What is polymorphism and it's type What is inheritance and it's type What is primary key and how can we compare both customer and product by which key.

Popular interview questions of Software Tester