KnowledgeHut BDM Sales Interview Questions and Answers

OOPS concepts refer to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation detail

PDO stands for PHP Data Objects, a database access layer providing a uniform method of access to multiple databases.

• PDO is a PHP extension that provides a data-access abstraction layer.

• It supports multiple database systems like MySQL, PostgreSQL, SQLite, etc.

• PDO helps prevent SQL injection attacks by using prepared statements.

• It allows for error handling and supports transactions.

• Example: $pdo = new PDO('mysql:host=loc...read more

Stored procedures are precompiled SQL queries stored in the database, while functions are blocks of code that can be called within SQL queries.

• Stored procedures are stored in the database and can be called using a specific name.

• Functions are defined using CREATE FUNCTION and can be called within SQL queries.

• Stored procedures can have input and output parameters, while functions can only return a single value.

• Stored pro...read more