In C# 10+, what is the purpose of the 'file-scoped type' modifier?

The correct answer is A: To restrict type visibility to the current file only. The 'file' access modifier (C# 11+) restricts type visibility to the file it's declared in, improving encapsulation at the file level.

What is the output of: bool result = (5 > 3) && (3 < 2); Console.WriteLine(result);

The correct answer is B: false. The && operator requires both conditions to be true. (5 > 3) is true, but (3 < 2) is false. Since one condition is false, the entire expression evaluates to false.

What is the difference between '==' and 'Equals()' when comparing strings in C#?

The correct answer is A: '==' compares references, Equals() compares values. For strings, '==' compares references (memory addresses) while Equals() compares the actual string values. However, C# has optimized string comparison, so both often behave similarly for string literals.

A banking application uses inheritance where Account is the parent class and SavingsAccount, CurrentAccount are derived classes. Each has different withdrawal rules. Which design principle is being followed?

The correct answer is B: Open/Closed Principle (OCP). Open/Closed Principle states that classes should be open for extension (SavingsAccount, CurrentAccount extend Account) but closed for modification (Account class rules remain unchanged). This is a classic example of OCP.

What is the output of: int x = 10; int y = x++; Console.WriteLine(x + " " + y);

The correct answer is B: 11 10. Post-increment (x++) returns the current value first, then increments. So y gets 10, then x becomes 11.

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C# Programming
ASP.NET Basics

C# and .NET for campus placement

5 Q 4 Topics Take Mock Test

Difficulty: All Easy Medium Hard 1–5 of 5

Topics in C# Programming

All Basics & Syntax 100 OOP in C# 100 Collections 71 ASP.NET Basics 19

Q.1 Hard ASP.NET Basics

A developer needs to create a RESTful API that returns JSON data. Which ASP.NET approach is most suitable?

A ASP.NET Core Web API with [ApiController]

B ASP.NET Web Forms with controls

C Classic ASP with VBScript

D ASP.NET MVC Views only

Correct Answer: A. ASP.NET Core Web API with [ApiController]

EXPLANATION

ASP.NET Core Web API with [ApiController] attribute is the modern approach for building RESTful APIs that return JSON.

Test

Q.2 Hard ASP.NET Basics

In ASP.NET Core, which method is used to register services in the dependency injection container?

A services.AddScoped(), services.AddSingleton(), services.AddTransient()

B services.Register()

C services.Inject()

D services.Configure()

Correct Answer: A. services.AddScoped(), services.AddSingleton(), services.AddTransient()

EXPLANATION

AddScoped, AddSingleton, and AddTransient are methods to register services with different lifetimes in ASP.NET Core DI.

Test

Q.3 Hard ASP.NET Basics

An e-commerce application needs to handle concurrent user requests efficiently. Which ASP.NET Core feature is most suitable?

A Async/Await with Task-based operations

B Synchronous request processing

C Single-threaded execution

D Blocking I/O operations

Correct Answer: A. Async/Await with Task-based operations

EXPLANATION

Async/Await enables non-blocking I/O operations, allowing ASP.NET Core to handle more concurrent requests efficiently.

Test

Q.4 Hard ASP.NET Basics

What is the correct order of Page Lifecycle events in ASP.NET Web Forms?

A Init → Load → EventHandling → Render → Unload

B Load → Init → EventHandling → Render → Unload

C Init → Load → Render → EventHandling → Unload

D Load → Init → Render → EventHandling → Unload

Correct Answer: A. Init → Load → EventHandling → Render → Unload

EXPLANATION

ASP.NET Web Forms lifecycle: Init → Load → Event Handling (ViewState restored) → Render → Unload.

Test

Q.5 Hard ASP.NET Basics

A web application needs to store a user preference that persists across multiple browser sessions. Which state management technique is most appropriate?

A Database with user ID

B ViewState

C Session State

D Application State

Correct Answer: A. Database with user ID

EXPLANATION

For persistent data across multiple sessions, database storage is the best approach. Session State is temporary and Application State is server-wide.

Test

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