.NET Programming MCQs with answers Page - 39

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Q. Which type of assembly is NOT stored in the GAC?

• (A) Shared assembly
• (B) Private assembly
• (C) Strong-named assembly
• (D) Signed assembly

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Correct answer - Option (B)

Explanation:

Private assemblies are stored locally within the application's folder and not in the GAC.

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Q. Which command adds a NuGet package in .NET Core?

• (A) dotnet get
• (B) dotnet nuget add
• (C) dotnet add package
• (D) nuget install

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Correct answer - Option (C)

Explanation:

`dotnet add package` adds a NuGet package reference to the project.

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Q. What is the purpose of `Assembly.Load()` in .NET?

• (A) Load a project file
• (B) Load an assembly into the current application domain
• (C) Attach a debugger
• (D) Register assembly in GAC

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Correct answer - Option (B)

Explanation:

`Assembly.Load()` is used for dynamically loading assemblies at runtime.

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Q. Which of these is true about .NET runtime identifiers (RIDs)?

• (A) They define UI themes
• (B) They target specific OS/runtime platforms
• (C) They track project versions
• (D) They enable object serialization

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Correct answer - Option (B)

Explanation:

RIDs specify the platform (OS and architecture) the application will run on.

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Q. What does the `System.IO` namespace provide?

• (A) Networking support
• (B) User authentication
• (C) File and stream handling
• (D) Object serialization

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Correct answer - Option (C)

Explanation:

`System.IO` contains classes for file and data stream operations.

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Q. Which feature of .NET allows applications to respond to memory pressure?

• (A) Finalizers
• (B) Garbage collection notification
• (C) Thread pooling
• (D) Reflection

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Correct answer - Option (B)

Explanation:

GC notifies applications when collections occur, allowing them to optimize memory use.

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Q. Which class provides access to the command-line arguments?

• (A) System.CommandLine
• (B) System.Args
• (C) System.Environment
• (D) System.Diagnostics

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Correct answer - Option (C)

Explanation:

`System.Environment.GetCommandLineArgs()` returns command-line arguments as a string array.

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Q. Which of the following supports multi-targeting in .NET projects?

• (A) Multiple .csproj files
• (B) TargetFrameworks element in .csproj
• (C) Multiple solution files
• (D) TargetConfig.json

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Correct answer - Option (B)

Explanation:

Using `<TargetFrameworks>` in the `.csproj` allows a single project to target multiple frameworks.

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Q. What does the .NET CLI command 'dotnet migrate' do?

• (A) Converts .NET Framework project to .NET Core
• (B) Migrates packages from one format to another
• (C) Updates project file to SDK-style format
• (D) It was used to migrate from project.json to .csproj in older .NET Core versions

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Correct answer - Option (D)

Explanation:

`dotnet migrate` was used in early .NET Core versions to convert project.json-based projects to .csproj.

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Q. Which environment variable controls the runtime configuration in .NET?

• (A) DOTNET_ENVIRONMENT
• (B) ASPNET_ENV
• (C) NET_RUNTIME_MODE
• (D) CLR_OPTIONS

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Correct answer - Option (A)

Explanation:

`DOTNET_ENVIRONMENT` is used to configure runtime environment (e.g., Development, Staging, Production).

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