The ultimate guide to C# concurrency interviews. Developed by FAANG engineers, it covers multithreading, Monitors, Deferred Callbacks, and solutions to Reader-Writer, Dining Philosopher Problems.

Concurrency in C# is one of the most complex and advanced topics brought up during senior engineering interviews. Knowledge of concurrency and multithreading can put interviewees at a considerable advantage. This course lays the foundations of advanced concurrency and multithreading and explains concepts such as Monitors and Deferred Callbacks in depth. It also builds simple and complete solutions to popular concurrency problems like the Reader-Writer and Dining Philosopher Problems that could be asked about in interviews. While prior knowledge of concurrency is not required to finish this course, familiarity with the basics of C# would be helpful.

C# Concurrency for Senior Engineering Interviews

async Task Wait()
{
    await Task.Delay(1000);
}

async Task Wrapper()
{
    await Wait();
    await Wait();
}

public void runTest()
{
    Wrapper();
}

The method waits for one second before executing

The method waits for two seconds before executing

The method doesn't doesn't block and exits because the <code class="mthd">Wrapper()</code> method is async

What is the outcome of running the <code class="mthd">runTest()</code> in the snippet above?

<p>What is the outcome of running the <code class="mthd">runTest()</code> in the snippet above?</p>


using System;
using System.Threading;
using System.Threading.Tasks;

class Demonstration
{
    static async Task Wait()
    {
        await Task.Delay(1000);
    }

    static async Task Wrapper()
    {
        await Wait();
        await Wait();
    }

    static public void runTest()
    {
        Wrapper();
    }

    static void Main()
    {
        runTest();
    }
}

This lesson challenges the reader on some of the concepts covered under asynchronous programming.

Basics

API Overview

Brief Intro to Asynchronous Programming

Interview Practice Problems

The End

Quiz

Question # 1

Question # 2