The ultimate guide to Ruby concurrency interviews. Developed by FAANG engineers, this course covers Monitors, Deferred Callbacks and problem-solving strategies for Reader-Writer and Dining Philosopher Problems.

Concurrency in Ruby 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 basics of Ruby would be helpful.

Ruby Concurrency for Senior Engineering Interviews

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   # Thread Variables   
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<p><span class="hi-yl">A thread-local variable is a variable that has its scope localized to a single thread.</span> We can create thread local variables using the instance method <code class="mthd">thread_variable_set()</code> on the <code class="clazz">Thread</code> class. And a thread local variable can be retrieved using the instance method <code class="mthd">thread_variable_set()</code>.</p>

<p>In the code widget below, we create five threads and each thread retrieves its id stored as a thread local variable. Note that we are able to set thread local variable from outside the code block that a thread executes.</p>
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<div>
   # Thread Variables   
   <div>
<p><span>A thread-local variable is a variable that has its scope localized to a single thread.</span> We can create thread local variables using the instance method <code>thread_variable_set()</code> on the <code>Thread</code> class. And a thread local variable can be retrieved using the instance method <code>thread_variable_set()</code>.</p>

<p>In the code widget below, we create five threads and each thread retrieves its id stored as a thread local variable. Note that we are able to set thread local variable from outside the code block that a thread executes.</p>
</div>
</div>


This lesson discusses thread-local variables.

The Basics

API Overview

Brief Intro to Asynchronous Programming

Interview Practice Problems

Bonus Questions

Epilogue

Thread Variables

Thread Variables