Software Engineer II Interview Questions and Answers for Freshers

SOLID design principles and Design Patterns are used to create maintainable and scalable software.

• SOLID principles help in creating loosely coupled and modular code.

• Design Patterns provide reusable solutions to common software problems.

• Examples of SOLID principles include Single Responsibility, Open/Closed, and Liskov Substitution.

• Examples of Design Patterns include Factory, Singleton, and Observer.

• Using SOLID principles and Design Patterns can improve code quality, reduce bu...read more

OOP concepts include class, encapsulation, inheritance, and polymorphism.

• Class is a blueprint for creating objects with shared properties and methods.

• Encapsulation is the practice of hiding implementation details and exposing only necessary information.

• Inheritance allows a class to inherit properties and methods from a parent class.

• Polymorphism allows objects to take on multiple forms or behaviors depending on the context.

• Example: A class 'Car' can have properties like 'make'...read more

Singleton design pattern restricts the instantiation of a class to one object.

• Ensures only one instance of a class exists in the system

• Provides a global point of access to that instance

• Used when only one instance of a class is required throughout the system

• Example: Database connection manager, Logger class

OOPs is a programming paradigm based on the concept of objects, which can contain data and code.

• OOPs stands for Object-Oriented Programming.

• It focuses on creating objects that interact with each other to solve a problem.

• It includes concepts like encapsulation, inheritance, and polymorphism.

• Encapsulation is the practice of hiding data and methods within an object.

• Inheritance allows objects to inherit properties and methods from a parent object.

• Polymorphism allows objects to ta...read more