I applied through a recruiter. The process took 2 weeks. I interviewed at Citadel (London, England) in Jul 2020
Interview
Very efficient. Started with a short chat with the hiring manager to establish fit, and then moved on to talking to various people in the larger team, junior and senior. The interviews were technical but not impossible, and they never scheduled more than two interviews in a day. All in all a pleasant experience.
Interview questions [1]
Question 1
In C++ would you prefer to store pointers or references in a vector.
Super hard. They really want you to know your stuff and not just the language, but how the compiler works and such as well. This is just me waffling for the 30 word count.
Interview questions [1]
Question 1
How does the state machine work on the compiler side?
Was scheduled two rounds of online live coding sessions. Problems were average, and solved both in given time. Interviewers' response was generally positive. Though one interviewer was more supportive than the other. Was told not to proceed further without any explanation.
Interview questions [1]
Question 1
Coding. Algorithm about medium difficulty on Leetcode.
I applied online. The process took 3 weeks. I interviewed at Citadel (New York, NY) in Aug 2024
Interview
First time talk to the manager (or the team leader). A simple question: a number from 1..N is missing, another number from 1..N is duplicated. Find the missing number. Provide as many solutions as possible.
Interview questions [3]
Question 1
(2) 3Sum of inequality relationship: return number of triples
(3) uncompress run length based sequences from multiple channels, then compress again, each sequence has sequence number from each channel, the sequence number can mess up a little (< 10 between true position and received position)