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Entrevista
I got a chance of phone interview with Facebook through Interviewstreet about a year and a half ago and failed quickly, mostly because I'm not a native English speaker and I am really bad at speaking English. I keep practicing English after that, then I got another chance 2 months ago, recommended by a friend interning at Facebook.
The recruiter return to me very quickly, in less than a week, but I'm very busy and not well prepared at that time, so I did the phone interview a month later. I was asked to solve an easy coding problem, I finished it very quickly but made a small mistake in analyzing the complexity. I only found that mistake after the interview. The interviewer is very experienced, I have a great time talking to him after the coding phrase.
Then I got a chance to onsite. I had 3 interviews. 2 interviewers asked coding problems and 1 asked coding problems and also talked about my projects in resume. The problems are harder than the problem in phone interview. I really struggled at 1 of them. But I think I did a good job at another ones. The interviewer who talking with me about my projects is from a strong background and seems a little tough, I must say I was very nervous when talking to him, but luckily it turned out well.
In overall, the recruiters and the interviewers are all very nice. I am not familiar with the process of interviewing with companies in U.S and asked so many questions, the recruiters replied very quickly.
Unexpectedly, the first question in the technical round felt familiar. It was about finding a subset of strings with unique character concatenation — same problem I had worked through on PracHub a few days earlier. The interview included a recruiter screen followed by a rigorous pair of technical interviews where I tackled data structures and algorithms alongside system design concepts. After successfully answering a few more challenging DSA questions, I received an offer. The entire experience was intense but ultimately rewarding, and I happily accepted the position.
Preguntas de entrevista [1]
Pregunta 1
Given an array of strings, pick a subset whose concatenation contains no duplicate characters, and return the maximum possible length of that concatenation.
Standard cookie cutter interview with a coding interview, a system design interview and culture interview. The coding part is basically leetcode. The system design is what you can find on many youtube videos. The culture one is more tricky as they want to see that you fit Meta's culture, not that you were doing great at your existing company. So skills like dealing with conflict without calling in managers is sought after.
Preguntas de entrevista [1]
Pregunta 1
coding: I forgot, sorry
system design: design ticketmaster
culture: talk about past project; when you disagreed with a peer; how I resolved dissagreements, etc.
The interview felt more straightforward than I anticipated for a well-known tech giant. After a recruiter screen, I faced a technical round that included a DSA question about finding the lowest common ancestor in a binary tree. I was pleasantly surprised when I realized the exact problem had popped up in the algorithm practice section on PracHub during my prep. Ultimately, the experience was decent, but I chose to decline the offer as it didn’t align with my current goals.
Preguntas de entrevista [1]
Pregunta 1
Given a binary tree, find the lowest common ancestor of two given nodes in the tree.