Troikaa Pharmaceuticals Interview Questions and Answers

Oops concepts and use of interface over abstract class

• Oops concepts are fundamental to object-oriented programming

• Encapsulation, Inheritance, Polymorphism, and Abstraction are the four pillars of OOP

• Interface is a contract that specifies the behavior of a class

• Abstract class is a class that cannot be instantiated and can have both abstract and non-abstract methods

• Interface is preferred over abstract class when multiple inheritance is required

The pillars of OOPS (Object-Oriented Programming) are Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance allows a class to inherit properties and behavior from another class. For example, a 'Car' class can inherit from a 'Vehicle' class.

• Encapsulation refers to the bundling of data with the methods that operate on that data. It restricts access to some of an object's components. For example, using private variables in a class.

• Polymorphism allows methods to d...read more

Optimizing a solution involves identifying and implementing improvements to increase efficiency and effectiveness.

• Analyze the current solution to identify areas for improvement

• Consider alternative approaches and technologies

• Implement changes and measure the impact on performance

• Continuously iterate and refine the solution

• Example: optimizing a manufacturing process to reduce waste and increase output

Error-handling mechanisms are essential for robust software. They help prevent crashes and improve user experience.

• Identify potential errors and exceptions

• Implement try-catch blocks

• Use logging to track errors

• Provide informative error messages to users

• Test error-handling thoroughly

• Consider using third-party libraries for error-handling

• Document error-handling procedures

An interface is a point where two systems, subjects, organizations, etc., meet and interact with each other.

• An interface defines the methods that a class must implement, without specifying how they should be implemented.

• Interfaces allow for multiple inheritance in programming languages like Java.

• Examples of interfaces in programming include Java interfaces, USB ports on electronic devices, and user interfaces on software applications.