A web application needs to store a user preference that persists across multiple browser sessions. Which state management technique is most appropriate?
Answer: A
For persistent data across multiple sessions, database storage is the best approach. Session State is temporary and Application State is server-wide.
Q.182Hard
What is the correct order of Page Lifecycle events in ASP.NET Web Forms?
Answer: A
ASP.NET Web Forms lifecycle: Init → Load → Event Handling (ViewState restored) → Render → Unload.
Q.183Easy
In ASP.NET Core, what is the purpose of the appsettings.json file?
Answer: A
appsettings.json stores application configuration like connection strings, logging levels, and custom settings.
Q.184Hard
An e-commerce application needs to handle concurrent user requests efficiently. Which ASP.NET Core feature is most suitable?
Answer: A
Async/Await enables non-blocking I/O operations, allowing ASP.NET Core to handle more concurrent requests efficiently.
Q.185Medium
What is Entity Framework in ASP.NET context?
Answer: A
Entity Framework is Microsoft's ORM that allows developers to work with databases using .NET objects instead of raw SQL.
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Q.186Hard
In ASP.NET Core, which method is used to register services in the dependency injection container?
Answer: A
AddScoped, AddSingleton, and AddTransient are methods to register services with different lifetimes in ASP.NET Core DI.
Q.187Easy
What does MVC stand for in ASP.NET MVC?
Answer: A
MVC (Model-View-Controller) is an architectural pattern separating data (Model), presentation (View), and business logic (Controller).
Q.188Hard
A developer needs to create a RESTful API that returns JSON data. Which ASP.NET approach is most suitable?
Answer: A
ASP.NET Core Web API with [ApiController] attribute is the modern approach for building RESTful APIs that return JSON.
Q.189Easy
What is the primary purpose of encapsulation in OOP?
Answer: B
Encapsulation bundles data and methods together, hiding internal implementation and controlling access through public interfaces, improving maintainability and security.
Q.190Easy
Which keyword is used to create a class that cannot be instantiated in C#?
Answer: B
The 'abstract' keyword prevents instantiation of a class and forces derived classes to implement abstract members, establishing a contract for subclasses.
Q.191Medium
In a library management system, multiple types of items (Book, Magazine, DVD) share common properties like ID and Title. Which OOP principle should be applied here?
Answer: B
Inheritance allows creating a base class (LibraryItem) with common properties, and derived classes can inherit these properties, reducing code duplication.
Q.192Medium
What is the difference between 'sealed' and 'abstract' keywords in C#?
Answer: A
sealed prevents a class from being inherited, while abstract requires derived classes to implement its abstract members. They serve opposite purposes.
Q.193Medium
A vehicle management system requires different vehicle types (Car, Bike, Truck) to calculate toll fees differently. Which feature should be used?
Answer: C
Polymorphism through inheritance allows each vehicle type to override the toll calculation method with its own implementation, enabling different behavior for each type.
Q.194Easy
In C#, what is the correct syntax to implement multiple interfaces in a class?
Answer: A
C# uses colon (:) to implement interfaces, and multiple interfaces are separated by commas. The 'implements' keyword is used in Java, not C#.
Q.195Medium
Which of the following statements about virtual methods in C# is TRUE?
Answer: B
Virtual methods are designed to be overridden by derived classes, enabling polymorphic behavior and runtime method resolution.
Q.196Medium
A restaurant ordering system needs to ensure each order has a unique ID generated automatically. Which design pattern and feature should be used?
Answer: A
Static variables are shared across all instances and can be used to generate unique IDs automatically without modifying external data.
Q.197Medium
What is the output of the following C# code?
public class Animal { public virtual void Sound() { Console.WriteLine("Some sound"); } }
public class Dog : Animal { public override void Sound() { Console.WriteLine("Bark"); } }
Animal animal = new Dog();
animal.Sound();
Answer: B
Due to polymorphism, the overridden method in Dog class is called at runtime, printing 'Bark' even though the reference type is Animal.
Q.198Medium
In an inventory management system, a Product class has a Price property. Which approach best ensures price cannot be negative?
Answer: B
Properties with private backing fields allow validation in setters, ensuring data integrity by preventing invalid values like negative prices.
Q.199Easy
Which of the following is NOT a pillar of OOP in C#?
Answer: D
The four pillars of OOP are Inheritance, Polymorphism, Encapsulation, and Abstraction. Compilation is a language feature, not an OOP principle.
Q.200Medium
A student management system implements IComparable<Student> to sort students. Which method must be implemented?
Answer: B
IComparable<T> interface requires implementation of CompareTo method to define comparison logic between objects of the same type.
