Investis Interview Questions and Answers for Experienced

Authentication in .NET involves using various authentication mechanisms such as Forms Authentication, Windows Authentication, and OAuth.

• Use Forms Authentication for web applications

• Use Windows Authentication for intranet applications

• Use OAuth for third-party authentication

• Implement authentication using ASP.NET Identity

• Use secure password storage mechanisms such as hashing and salting

Dependency injection is a design pattern where an object's dependencies are provided externally rather than created internally.

• Dependency injection helps to decouple components and make them more modular.

• It allows for easier testing and maintenance of code.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.

• Example: Instead of creating a database connection ob...read more

A pipe is a feature in Angular that allows you to transform data before displaying it.

• Pipes are used in Angular templates with the '|' symbol.

• There are built-in pipes like 'uppercase' and 'date'.

• Custom pipes can be created using the 'Pipe' decorator and implementing the 'PipeTransform' interface.

• Custom pipes can take arguments to modify their behavior.

• Pipes can be chained together to perform multiple transformations on

Middleware is software that acts as a bridge between different applications, allowing them to communicate and exchange data.

• Middleware is a layer of software that sits between applications and operating systems

• It provides services such as message routing, authentication, and data transformation

• Examples include Apache Tomcat, Microsoft IIS, and IBM WebSphere

No, assigning null to an array makes it empty and its length becomes 0.

• Assigning null to an array makes it empty.

• The length of an empty array is 0.

• Trying to access length property of null will result in an error.

Null value in JavaScript represents absence of any object value.

• Null is a primitive value in JavaScript.

• It is assigned to a variable to indicate that it has no value.

• It is different from undefined, which means a variable has been declared but not assigned a value.

• Null is falsy in JavaScript, meaning it is considered false in a boolean context.

• Null can be used to clear the value of an object property.

IDisposable is an interface used to release unmanaged resources.

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

• It has a single method called Dispose() which is used to release the resources.

• It is implemented by classes that use unmanaged resources and needs to be disposed of.

• Example: SqlConnection class implements IDisposable to release the database connection.

• Example: FileStream...read more

Dependency Injection is a design pattern that allows objects to receive dependencies rather than creating them internally.

• Dependency Injection is used to reduce tight coupling between software components.

• It allows for easier testing and maintenance of code.

• There are three types of Dependency Injection: Constructor Injection, Setter Injection, and Interface Injection.

• Frameworks like Spring and Angular provide built-in s

Concatenate the values in the given integer array with comma.

• Convert the integer array to string array using Arrays.toString()

• Use String.join() method to concatenate with comma

Interfaces and abstract classes are used for abstraction and defining contracts.

• Interfaces are a collection of abstract methods that define a contract for a class to implement.

• Abstract classes are classes that cannot be instantiated and can have both abstract and concrete methods.

• Interfaces can be implemented by multiple classes, while a class can only inherit from one abstract class.

• Interfaces are used for loose coupl...read more

No, abstract classes cannot be instantiated.

• Abstract classes are incomplete and cannot be instantiated on their own.

• They can only be used as a base class for other classes.

• Instantiation of an abstract class will result in a compile-time error.

• However, concrete classes that inherit from the abstract class can be instantiated.

SOLID is a set of principles for object-oriented programming to make software more maintainable and scalable.

• S - Single Responsibility Principle

• O - Open/Closed Principle

• L - Liskov Substitution Principle

• I - Interface Segregation Principle

• D - Dependency Inversion Principle

• Example: Using Single Responsibility Principle to separate UI and business logic

• Example: Using Open/Closed Principle to extend functionality without mo

We used the Model-View-Controller (MVC) design pattern in our application.

• MVC separates the application into three interconnected components: the model, the view, and the controller.

• The model represents the data and business logic of the application.

• The view displays the data to the user.

• The controller handles user input and updates the model and view accordingly.

• MVC promotes separation of concerns and modularity.

• Examp...read more

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• Improved user experience with Citrix HDX technology

• Centralized management and monitoring with Citrix Virtual Apps and Desktops

• Enhanced security with Citrix ADC and NetScaler Gateway

• Scalability and flexibility with Citrix Cloud services

• Ability to leverage existing Citrix investments

• Reduced infrastructure costs and