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

<div class="ans">
# Sleeping Threads
<p>It's trivial to make a thread sleep and give up its time slice on the CPU using the <code class="mthd">sleep()</code> method, which accepts a number as an argument. The argument can also be fractional and specifies the number of seconds to sleep.</p>

<p>Consider the example below. The spawned child thread sleeps for 5 seconds. The main thread remains blocked until the child thread exits. </p>
</div>

<div>
# Sleeping Threads
<p>It's trivial to make a thread sleep and give up its time slice on the CPU using the <code>sleep()</code> method, which accepts a number as an argument. The argument can also be fractional and specifies the number of seconds to sleep.</p>

<p>Consider the example below. The spawned child thread sleeps for 5 seconds. The main thread remains blocked until the child thread exits. </p>
</div>

This lesson talks about putting threads to sleep and terminating them.

The Basics

API Overview

Brief Intro to Asynchronous Programming

Interview Practice Problems

Bonus Questions

Epilogue

Sleeping and Terminating Threads

Sleeping Threads