Software Engineer · Phone Screen · Coding

Meta — Software Engineer ✅ Passed

Level: Mid-Level

Round: Phone Screen · Type: Coding · Difficulty: 3/10 · Duration: 60 min · Interviewer: Neutral

Topics: Prefix Sum, Object-Oriented Design

Location: San Francisco Bay Area

Interview date: 2026-01-15

Summary

Two coding questions were asked, focusing on prefix sum calculation and object-oriented design for stock trading.

Details

I had a phone screen that included two coding questions that I hadn't seen before.

• The first question involved calculating the sum of elements between two indices in an array using the prefix sum approach.
• The second question required me to design a class with methods to register daily stock trading information (buy/sell) and retrieve all stock transactions sorted by time and amount.