Excellon Software Interview Questions and Answers

Yes, we can have multiple Layout pages in ASP.NET MVC.

• Multiple Layout pages can be created in ASP.NET MVC to provide different layouts for different sections of the website.

• Each View can specify which Layout page to use by setting the Layout property in the View file.

• Layout pages can be nested, allowing for a hierarchy of layouts to be used.

• Example: _Layout.cshtml, _AdminLayout.cshtml, _UserLayout.cshtml

You can change the layout page during runtime by dynamically setting the layout property in the code behind.

• Set the layout property in the code behind based on certain conditions or user input.

• Use conditional statements to determine which layout page to use.

• Example: if(userRole == 'admin') { Layout = '~/Views/Shared/_AdminLayout.cshtml'; } else { Layout = '~/Views/Shared/_UserLayout.cshtml'; }

Types of filters in MVC include Authorization filters, Action filters, Result filters, and Exception filters.

• Authorization filters restrict access to actions based on user roles or permissions.

• Action filters execute code before and after an action method is called.

• Result filters execute code before and after the result of an action method is executed.

• Exception filters handle exceptions thrown during the execution of an

Authentication is the process of verifying the identity of a user or system.

• Authentication ensures that the user is who they claim to be before granting access to resources.

• Common authentication methods include passwords, biometrics, security tokens, and multi-factor authentication.

• Examples of authentication protocols include OAuth, SAML, and OpenID Connect.

Authorization is the process of determining if a user has the necessary permissions to access a resource or perform an action.

• Authorization involves verifying the identity of a user and checking if they have the required permissions.

• It is different from authentication, which is the process of verifying the identity of a user.

• Authorization can be role-based, where permissions are assigned based on roles, or attribute-ba...read more

Partial View is a reusable view component in ASP.NET MVC, while View is a complete page or layout.

• Partial View is a smaller, reusable view component that can be rendered within a View or another Partial View.

• View is a complete page or layout that can contain multiple Partial Views and is typically returned by a controller action.

• Partial Views are useful for rendering common elements like headers, footers, or sidebars a...read more

View_Start class is used to define common settings for all views in an ASP.NET MVC application.

• View_Start class is a special class in ASP.NET MVC that is used to define common settings for all views in the application.

• It is typically used to set properties like layout, master page, and other view-related settings.

• By defining these settings in View_Start class, they are automatically applied to all views in the applicat...read more

Use bitwise operations to perform multiplication without using the * operator.

• Use bitwise left shift operator to multiply Variable 1 by 2^n where n is the value of Variable 2.

• Add the result of each left shift operation to get the final result.

Use SQL query to find the second highest salary employee names in Employee table.

• Use ORDER BY clause to sort the salaries in descending order.

• Use LIMIT 1 OFFSET 1 to get the second highest salary.

• Join the Employee table with itself to get the employee names corresponding to the second highest salary.

Collections are classes in .NET that allow you to store and manage groups of objects.

• Collections provide various data structures like lists, queues, stacks, dictionaries, etc.

• They allow for easy manipulation and retrieval of data.

• Examples include List, Queue, Stack, Dictionary.

Method overloading is when multiple methods have the same name but different parameters. Method overriding is when a subclass provides a specific implementation of a method that is already provided by its parent class.

• Method overloading allows a class to have multiple methods with the same name but different parameters.

• Method overriding occurs in a subclass when a method has the same name and parameters as a method in ...read more

String is a sequence of characters, while StringBuilder is a mutable sequence of characters used for efficient string manipulation.

• String is immutable, meaning once created, it cannot be changed. StringBuilder is mutable, allowing for efficient modifications.

• String concatenation creates a new string object each time, while StringBuilder allows for efficient appending of characters.

• String is used for constant strings, w...read more

HTML helpers are methods that help in rendering HTML in a view. Yes, we can create custom HTML helpers.

• HTML helpers are methods that generate HTML markup in a view.

• They help in reducing the amount of HTML code that needs to be written in a view.

• Custom HTML helpers can be created by defining extension methods on the HtmlHelper class.

• Custom HTML helpers can be useful for generating reusable HTML components or complex HTM...read more

SOLID principles are a set of five design principles that help developers create more maintainable, flexible, and scalable software.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subc...read more

ViewBag and ViewData are used in ASP.NET MVC to pass data from controller to view.

• ViewBag is a dynamic property that allows you to pass data from controller to view.

• ViewData is a dictionary object that allows you to pass data from controller to view.

• ViewBag is a dynamic object while ViewData is a dictionary object.

• ViewBag is easier to use but ViewData is type-safe.