.NET SDK Installation and Setup in C Sharp (C#) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of .NET SDK Version Check Command

What is the output of running the command dotnet --version after installing the .NET SDK version 7.0.100?

A Microsoft .NET SDK 7.0.100

B dotnet version 7.0.100

C 7.0.100

D Error: command not found

💡 Hint

The dotnet --version command prints only the version number of the installed SDK.

The dotnet --version command outputs the exact version number of the installed .NET SDK, such as '7.0.100'. It does not print extra text or error messages if the SDK is installed correctly.

🧠 Conceptual

intermediate

Understanding .NET SDK and Runtime Relationship

Which statement correctly describes the relationship between the .NET SDK and the .NET Runtime?

A The .NET SDK includes the .NET Runtime and tools needed to build and run applications.

B The .NET Runtime includes the SDK and is used only for building applications.

C The SDK and Runtime are completely separate and must be installed independently for any .NET app.

D The SDK is only needed to run applications, while the Runtime is for development.

💡 Hint

Think about what you need to build and run apps versus just running them.

The .NET SDK contains the .NET Runtime plus tools like the compiler and CLI commands. The Runtime alone is only for running apps, not building them.

🔧 Debug

advanced

Diagnosing .NET SDK Not Found Error

You installed the .NET SDK on Windows but running dotnet --version returns 'dotnet: command not found'. What is the most likely cause?

A The .NET SDK installer failed to complete the installation.

B The PATH environment variable does not include the folder where dotnet.exe is installed.

C The .NET Runtime is missing but the SDK is installed correctly.

D The dotnet command requires administrator privileges to run.

💡 Hint

Check if the system knows where to find the dotnet command.

If the PATH variable does not include the SDK install folder, the system cannot find the dotnet command, causing this error.

📝 Syntax

advanced

Correct Command to Install a Specific .NET SDK Version

Which command correctly installs .NET SDK version 6.0.400 using the dotnet-install script on Linux?

A bash dotnet-install.sh --version 6.0.400

B bash install-dotnet.sh -v 6.0.400

C install-dotnet --version=6.0.400

D dotnet-install.sh --install 6.0.400

💡 Hint

The official script uses the --version option with the bash command.

The official dotnet-install script is run with bash and uses the --version option to specify the SDK version.

🚀 Application

expert

Determining Installed .NET SDKs Programmatically

You want to write a C# program that lists all installed .NET SDK versions on the machine. Which approach will reliably get this information?

A Check the <code>Program Files/dotnet/sdk</code> directory for installed SDK folders.

B Read the registry keys under <code>HKEY_LOCAL_MACHINE\SOFTWARE\dotnet\Setup\InstalledVersions</code> on Windows only.

C Use the <code>System.Environment.Version</code> property in C# to get all installed SDK versions.

D Run the command <code>dotnet --list-sdks</code> from the program and parse its output.

💡 Hint

Think about a cross-platform way to get all SDK versions from the official tool.

The dotnet --list-sdks command lists all installed SDK versions on any platform. Running it and parsing output is reliable and cross-platform.