HCLTech Senior Technical Consultant Interview Questions and Answers for Experienced

An abstract class is a class that cannot be instantiated and is meant to be subclassed.

• An abstract class serves as a blueprint for other classes.

• It can have both abstract and non-abstract methods.

• Abstract methods are declared without an implementation and must be implemented by the subclasses.

• An abstract class can have instance variables, constructors, and static methods.

• It provides a common interface for all the subcl...read more

Middleware components in C# are software components that sit between an application and the operating system, providing services and functionality.

• Middleware components act as a bridge between the application and the operating system.

• They provide services such as authentication, logging, caching, and routing.

• Middleware components can be added to the application's request pipeline to handle specific tasks.

• Examples of mi...read more

Use 'out' for returning values and 'ref' for passing variables by reference to modify them directly.

• Use 'out' when a method needs to return multiple values. Example: 'int result; method(out result);'

• Use 'ref' when you want to pass an existing variable to a method and modify its value. Example: 'method(ref existingVar);'

• 'out' requires the variable to be assigned within the method before use, while 'ref' requires it to b...read more

MVC filter is a feature in MVC framework that allows you to apply cross-cutting concerns to actions and controllers.

• MVC filter is used to implement cross-cutting concerns like logging, authentication, authorization, etc.

• It can be implemented by creating a custom filter class that inherits from the FilterAttribute class.

• The custom filter class can override the OnActionExecuting, OnActionExecuted, OnResultExecuting, and ...read more

Web API is a set of rules and protocols that allows different software applications to communicate and interact with each other over the internet.

• Web API stands for Application Programming Interface

• It enables communication between different software systems

• Web API uses HTTP protocols for communication

• It allows developers to access and manipulate data from remote servers

• Examples of Web APIs include Google Maps API, Twit...read more

Components in Angular communicate through input and output properties, event emitters, and services.

• Components can communicate with each other using input and output properties.

• Input properties allow data to flow from a parent component to a child component.

• Output properties use event emitters to send data from a child component to a parent component.

• Components can also communicate through services, which act as a shar...read more