Nous Infosystems Interview Questions and Answers

Inversion of Control (IoC) in ASP.NET Core promotes loose coupling and enhances testability through dependency injection.

• IoC is a design principle that transfers the control of object creation to a container.

• ASP.NET Core uses Dependency Injection (DI) as its primary IoC mechanism.

• Services are registered in the Startup class using 'services.AddTransient', 'services.AddScoped', or 'services.AddSingleton'.

• Example: 's...read more

In-memory caching stores data in the application's memory, while distributed caching stores data across multiple servers for scalability.

• In-Memory Caching: Data is stored in the memory of the application server, providing fast access but limited by server memory capacity.

• Distributed Caching: Data is stored across multiple servers, allowing for larger datasets and improved fault tolerance, e.g., using Redis or Memc...read more

Garbage Collection is an automatic memory management process that reclaims memory occupied by objects no longer in use.

• Garbage Collection identifies and frees memory that is no longer referenced by the program.

• It helps prevent memory leaks, which occur when memory is allocated but not released.

• Common algorithms include Mark-and-Sweep, Reference Counting, and Generational Collection.

• For example, in Java, the JVM au...read more

setTimeout executes a function once after a specified time, setInterval executes a function repeatedly at specified intervals, setImmediate executes a function immediately after the current event loop.

• setTimeout executes a function once after a specified delay.

• setInterval executes a function repeatedly at specified intervals.

• setImmediate executes a function immediately after the current event loop.

• Example: setTime...read more

OOPs concepts refer to Object-Oriented Programming principles such as 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 implementatio...read more

IDisposable method is used to release unmanaged resources in .NET applications.

• IDisposable interface is used to release unmanaged resources like file handles, database connections, etc.

• It contains a single method Dispose() which should be implemented to release resources.

• It is recommended to use IDisposable along with using statement for proper resource management.

• Example: FileStream class in C# implements IDispos...read more