Concurrency is one of the most desired skills by employers, and also one of the most advanced topics brought up in interviews. Because it shows your ability to design a program that efficiently uses resources but at the same time it’s a very tricky topic to master and that’s why interviewers love it.
Concurrency can be used to gauge your expertise and technical depth and is often uses as a key deciding factor in your overall hiring level.
Whether you are just entering your career or are looking to switch jobs, it never hurts to dedicate some time to mastering concurrency. At a bare minimum, you should know about threads, processes, shared memory, monitors, locks, critical section, and deferred callbacks. Having a good knowledge of how to avoid race conditions and deadlock can be even better.
Practicing classical concurrency interview questions like Producer-Consumer, Dining Philosopher, and others can also teach you a lot about concurrency and multithreading and give you the confidence to visualize how code and data work when multiple threads run in parallel.
If you have an interviewing coming up, then I highly suggest you double down on concurrency. This is becuase I know it can be one of the most challenging topics brought up during most of the interviews, even for experienced developers. However, gaining a mastering concurrency will put you at a considerable advantage over other candidates.
If you need resources, I strongly suggest you check out Multithreading and Concurrency Interview Questions by C.H. Afzal on Educative. This course contains the most common concurrency interview questions solved in Python, Java, C#, and Ruby. Going through those questions will give you a good background on Concurrency and Multithreading.
