R Systems International Senior Software Engineer Interview Questions, Process, and Tips

Mainly 4 Questions
1-2 MCQ
3: Create a class deriving from IReptile and return an object of HatchEgg which has Hatch Method. Hatch Method should return same IReptile object.
4) Sorting IDs in dictionary

Q1. The Interviewer was Very Rude and he doesn't care about the Requirements of Hiring a candidate. he was constantly asking about Other Companies Architectures and The things you did in them. instead of havin...read more
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Q2. SOLID, Interfaces , Boxing/Unboxing
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Q1. Why do we use SOLID principle, SRP and OCP violation?
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SOLID principles help in creating maintainable, scalable, and flexible software.
• SOLID principles help in creating software that is easier to maintain and extend.

• Single Responsibility Principle (SRP) ensures that a class has only one reason to change, leading to more modular and cohesive code.

• Open/Closed Principle (OCP) states that a class should be open for extension but closed for modification, allowing for easy chang...read more
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Q2. What is singleton design pattern and how to implement it?
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Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Create a private static instance of the class within the class itself.

• Provide a public static method to access the instance.

• Ensure the constructor of the class is private to prevent instantiation from outside the class.

• Example: Singleton pattern is commonly used in database connections to ensure only one connectio
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Q3. OOPs based question: abstract vs interface, multiple inheritance, method overloading vs method overriding.
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Q4. Dependency injection- what is it and any use case where to use?
Ans. 
Dependency injection is a design pattern where components are provided with their dependencies rather than creating them internally.
• Dependency injection helps in achieving loose coupling between components.

• It makes components easier to test by allowing for easier mocking of dependencies.

• Use cases include injecting database connections, logging services, and external API clients into components.
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Q1. Multithreading and TPL related questions?
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Q2. How can we debug the any published dll?
Ans. 
Debugging a published dll involves using tools like Visual Studio debugger and logging mechanisms.
• Use Visual Studio debugger to attach to the process using the published dll

• Set breakpoints in the code to pause execution and inspect variables

• Use logging mechanisms to track the flow of execution and identify issues

• Check for any exceptions or errors thrown by the dll
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Q3. Data seeding in entity framework and how to map tables with entity?
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Data seeding in Entity Framework involves pre-populating database tables with initial data. Mapping tables with entities involves defining relationships between database tables and entity classes.
• Data seeding in Entity Framework can be done using the 'Seed' method in the 'Configuration' class of the DbContext.

• To map tables with entities, use data annotations or Fluent API to define relationships between entities and da...read more
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Q4. Deployment related question in IIS.
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Q1. Salary negotiation related discussion
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Q1. SOLID principal
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Q2. Difference between MVC and WebAPI?
Ans. 
MVC is a design pattern for organizing code in a web application, while WebAPI is a framework for building HTTP services.
• MVC stands for Model-View-Controller and is used for structuring code in a web application

• WebAPI is a framework for building HTTP services that can be accessed by various clients

• MVC is typically used for creating web applications with user interfaces, while WebAPI is used for creating APIs that can b...read more
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Q1. Oops concepts in real life.
Ans. 
Oops concepts in real life refer to the principles of object-oriented programming applied to everyday scenarios.
• Encapsulation: Keeping related data and methods together to protect them from outside interference. Example: A car's engine is encapsulated within the car's body.

• Inheritance: Allowing a new class to inherit properties and behaviors from an existing class. Example: A child inheriting traits from their parents.

• ...read more
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Q2. Secure data/Encryption
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