The only guide you’ll need on concurrency & multithreading for senior engineers. Pressure test your skills with real-world practice problems from top companies.

Concurrency in Java 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 that can be asked about in interviews like the Reader-Writer Problem and the Dining Philosopher Problem. While prior knowledge of concurrency is not required to follow through with this course, familiarity with the very basics of concurrency would be helpful.

Java Multithreading for Senior Engineering Interviews


# Missed Signals 
    
<p>A missed signal happens when a signal is sent by a thread before the other thread starts waiting on a condition. This is exemplified by the following code snippet. Missed signals are caused by using the wrong concurrency constructs. In the example below, a condition variable is used to coordinate between the <b>signaller</b> and the <b>waiter</b> thread. The condition is signaled at a time when no thread is waiting on it causing a missed signal.</p>

<p>In later sections, you'll learn that the way <span class="hi-yl">we are using the condition variable's <code>await</code> method is incorrect. The idiomatic way of using <code>await</code> is in a while loop with an associated boolean condition.</span> For now, observe the possibility of losing signals between threads.</p>    

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# Missed Signals 
    
<p>A missed signal happens when a signal is sent by a thread before the other thread starts waiting on a condition. This is exemplified by the following code snippet. Missed signals are caused by using the wrong concurrency constructs. In the example below, a condition variable is used to coordinate between the <b>signaller</b> and the <b>waiter</b> thread. The condition is signaled at a time when no thread is waiting on it causing a missed signal.</p>

<p>In later sections, you'll learn that the way <span>we are using the condition variable's <code>await</code> method is incorrect. The idiomatic way of using <code>await</code> is in a while loop with an associated boolean condition.</span> For now, observe the possibility of losing signals between threads.</p>    

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The Basics

Multithreading in Java

Java's Memory Model

Interview Practice Problems

Bonus Questions

Beyond the Interview

Java Concurrency Reference

Revision & Quizzes

Missed Signals

Missed Signals