I applied online. I interviewed at SingleStore (San Francisco, CA) in Nov 2020
Interview
Quite hard; though the people there are helpful, if you don't know your low level systems in and out you're going to have a rough time. Read systems design books before going in and be very familiar with how individual operations work.
Interview questions [1]
Question 1
Low level Systems questions, such as byte buffers and implementation of a fully atomic stack from scratch.
First round is kind of getting to know your real time problem solving skills by providing you to find a bug/add some function in their codebase in real time. Good if you have worked with large code base.
Interview questions [1]
Question 1
To find a bug/add some function in the codebase in real time.
Round1 - screening call with Talent partner based on location, background requirements + 1 hour C codebase understanding and adding features using functions
Round2 - 45 minutes Technical Interview based on experience and deep into low level system design language
Interview questions [1]
Question 1
How does malloc() work internally? What’s the difference between malloc, calloc, realloc, and new?
Couple of coding interviews, pretty standard. One was different from the normal and a very cool interview about an existing in memory database. The process is quite long but that's how it goes at good companies sometimes