Abnormal AI | SSE-Site Reliability | Remote | Rejected

cod05
403
Jul 09, 2025
Jul 09, 2025

Applied online

Recruiter call

  • Why Abnormal AI

Setup two 1 hour interview on the same day

1-Operational Fundamental (1 hour)
2-Coding on codesignal (You must write code in Python only) (1 hour)

Operational Fundamental

  • What happens when you type url in the browser
  • Questions on DNS
  • Authoritative and non-authoritative DNS
  • What are DNS record types
  • Some basic Cache question
  • Explain TCP/IP/HTTPS protocols
  • TCP vs UDP
  • What is TLS connection, some multithreading
  • Scenario based question - You have two exact same database server running on two different hardware one database is running slow then another one. What are the steps you would take to debug this?

Coding

Very similar to the leetcode design-underground-system questions
You have CSV file which contains below data
(userid, session time, session state)
1, 123, open,
3, 234, open,
1, 453, close,
3, 876, close,

You need to return average session time for each user. There is test file which run test cases against your code, make sure to strip white spaces after splitting the data

https://leetcode.com/problems/design-underground-system/description/

After 1 day received rejection email.
Feedback - Struggle to debug code to strip() the data, and indetify the indentation issue and couldn't make to bonus or part 2

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