MakeMyTrip Sdet Interview Questions and Answers

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 us

The key that uniquely identifies each tuple in a table is called a primary key.

• A primary key is a column or set of columns in a table that uniquely identifies each row.

• It must have a unique value for each row and cannot be null.

• Examples of primary keys include social security numbers, email addresses, and order numbers.