HCLTech Senior .NET Developer Interview Questions and Answers

First round is technical MCQ question which is 15 and gives 10 min . So that cracked easly. Simple question

Q1. Mostly asked on .net core mvc and sql .net core : Dependency injection Singleton Addscoped Addtransient App.run Middleware And other basic Sql Some practical questions Finding top 5 employees whose...read more
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Q2. In c# Practical question like Sorting array using bubble sort Finding kth largest number from array Fibonacci series Multiple inheritance String manipulation Like counting chars count And some othet
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Q1. In depth questions related to C#
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Q2. In depth question related to .NET and Angular
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Q3. Routing questions
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Q4. Explain Filters
Ans. 
Filters in .NET are used to perform logic before or after an action method is executed.
• Filters can be used for authorization, logging, exception handling, etc.

• Examples include AuthorizeFilter, ActionFilter, ExceptionFilter, ResultFilter.

• Filters can be applied globally, at controller level, or at action level.
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Q5. Exception handling
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Q1. What are Design Patters? What is DI?
Ans. 
Design patterns are reusable solutions to common problems in software design. DI stands for Dependency Injection, a design pattern used to inject dependencies into a class.
• Design patterns are best practices for solving common software design problems.

• DI is a design pattern where dependencies are injected into a class rather than created within the class.

• Examples of design patterns include Singleton, Factory, and Observ...read more
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Q2. What are Microservices? How to manage load balancing in Microservices?
Ans. 
Microservices are a software architecture design where applications are broken down into smaller, independent services that communicate with each other through APIs.
• Microservices are designed to be small, focused, and independently deployable services.

• Each microservice typically performs a single function or task within the application.

• Microservices communicate with each other through APIs, often using lightweight prot...read more
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Q3. Find indexes of two values in an array who's Sum is 8 or a dynamic value
Ans. 
Find indexes of two values in an array whose sum is 8 or a dynamic value
• Iterate through the array and store the indexes of each element in a dictionary with the difference between the target sum and the element as the key

• Check if the current element exists in the dictionary, if so, return the indexes of the two elements

• Handle cases where the target sum is dynamic by replacing 8 with a variable
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Q1. What are difference between put , patch and post
Ans. 
PUT is used to update or replace an existing resource, PATCH is used to partially update a resource, and POST is used to create a new resource.
• PUT is idempotent, meaning multiple identical requests will have the same effect as a single request.

• PATCH is not necessarily idempotent and is used to make partial updates to a resource.

• POST is used to create a new resource on the server.
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Q2. What is extension method ,value type and reference type ,migration in codefirst approach,Configure menthod in dotnet core ,
Ans. 
Extension methods allow adding new methods to existing types, value types store data directly, reference types store references to data, migration in code-first approach involves updating database schema, Configure method in .NET Core configures services and middleware.
• Extension methods are static methods that can be called as if they were instance methods on an existing type.

• Value types store data directly on the stac...read more
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Q3. Drop ,delete and truncate difference
Ans. 
Drop, delete, and truncate are SQL commands used to remove data from a table, but they have different functionalities.
• DROP: Used to remove an entire table or database

• DELETE: Used to remove specific rows from a table

• TRUNCATE: Used to remove all rows from a table, but keeps the table structure
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Q4. Design patterns ,Solid priniciple ,Garbage Collector working process ,using statement
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Q5. Routing concept in MVC,
Ans. 
Routing in MVC is the process of mapping URLs to controller actions.
• Routing determines which controller and action to execute based on the URL requested

• Routes are defined in the RouteConfig.cs file in MVC applications

• Routes can include parameters that are passed to the controller action

• Routes can be customized using route constraints and route attributes
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Q1. Azure and Git Devops
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Q1. Good technical questions, focused on OOP concepts and SQL related questions. Also asked about current project related questions.
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