Scantech ASP.NET Developer Interview Questions and Answers

Reverse a string
Rotate the array

Q1. Major Question regarding C# , .Net , SQL server
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Q1. Write linq query
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LINQ query to retrieve data from a collection
• Use 'from' to specify the data source

• Use 'where' to filter the data

• Use 'select' to define the shape of the result

• Example: var result = from item in collection where item.Property == value select item;
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Q2. SOILD principle
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SOLID is a set of five principles for writing clean, maintainable, and scalable object-oriented code.
• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Classes should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with objects of its subclasses without affecting the pro...read more
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Q1. 1. Explain Oops concepts in c#
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OOPs concepts in C# include inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance allows a class to inherit properties and methods from another class.

• Encapsulation is the practice of hiding implementation details and exposing only necessary information.

• Polymorphism allows objects of different types to be treated as if they are the same type.

• Abstraction is the process of hiding complex implementation det...read more
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Q2. 2. Difference between abstraction and encapsulation
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Abstraction focuses on the outside view of an object while encapsulation deals with the internal workings of an object.
• Abstraction is the process of hiding complex implementation details and showing only necessary information to the user.

• Encapsulation is the process of wrapping data and methods into a single unit (class) and restricting access to the data from outside the class.

• Abstraction is achieved through interface...read more
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Q1. Basics of oops concepts,caching,session,viewstate,boxing and unboxing,basic queries
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Q2. Delete and truncate difference,roles in your previous project,garbage collector
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Delete vs Truncate, roles in previous project, garbage collector
• Delete removes rows one by one, while truncate removes all rows at once

• Roles in previous project may include developer, tester, project manager, etc.

• Garbage collector in .NET automatically manages memory by reclaiming unused objects
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Q3. How did you handled production things in your application,how much do you rate yourself in sql
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Q1. Salary discussion
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Journal aptitude like that match reasoning etc

Q1. Tell me about your self My self
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Q2. See resume and ask me question
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Q3. Tell me about your company
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Q1. What is dependency injection
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Dependency injection is a design pattern in which a class receives its dependencies from external sources rather than creating them itself.
• Allows for better code reusability and testability

• Promotes loose coupling between classes

• Commonly used in ASP.NET Core for managing services and components
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Q2. View, primary key, unique key
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Q1. What are restful api's
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RESTful APIs are a type of web service that follows the principles of REST (Representational State Transfer) architecture.
• RESTful APIs use standard HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations on resources.

• They are stateless, meaning each request from a client to the server must contain all the information necessary to understand the request.

• RESTful APIs typically return data in JSON or XML forma...read more
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Q2. What are stored procedures
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Stored procedures are precompiled SQL queries stored in a database for reuse.
• Stored procedures are used to improve performance by reducing the need to send multiple queries to the database server.

• They can be parameterized to accept input values and return results.

• Stored procedures can contain logic and business rules, making them reusable and secure.

• Examples include procedures for inserting, updating, and deleting data
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Q1. Mcq questions were asked with camera on
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Q1. Questions were asked on SQL, Oops concepts, etl setup
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Q1. All opps concept. What is constructor?, what is delegets? What is inheritance? What is abtract class.?
Ans. 
Explanation of OOP concepts like constructor, delegates, inheritance, and abstract class.
• Constructor is a special method that is called when an object is created.

• Delegates are type-safe function pointers used to reference methods.

• Inheritance is a mechanism that allows a class to inherit properties and methods from another class.

• Abstract class is a class that cannot be instantiated and is used as a base class for other
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Q2. Explain MVC . Model view control
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MVC is a software architecture pattern that separates an application into three interconnected components: Model, View, and Controller.
• Model represents the data and business logic of the application

• View is responsible for rendering the user interface

• Controller handles user input and updates the model and view accordingly
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Q1. What are the action listens. explain action filter
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Action filters are used to perform additional processing before or after an action method executes.
• Action filters are attributes that can be applied to an action method or controller.

• They can be used to perform authentication, logging, caching, and other tasks.

• Action filters can be used to modify the result of an action method.

• There are four types of action filters: Authorization filters, Action filters, Result filters
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Q2. What is output cache
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Output cache stores the output of a page or user control so that it can be quickly retrieved for subsequent requests.
• Output cache is used to improve the performance of web applications.

• It reduces the number of requests made to the server by storing the output of a page or user control.

• Output cache can be set at the page level or at the application level.

• It can be configured to expire after a certain amount of time or w...read more
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