EBay Industry Coding Assessment (OA) Experience on CodeSignal
Question Details
eBay Industry Coding Assessment (ICA) Overview
Platform: CodeSignal
Format: Unlike standard assessments containing random data structure questions, this exam utilizes a project-based appro
Full Details
eBay Industry Coding Assessment (ICA) Overview
Platform: CodeSignal
Format: Unlike standard assessments containing random data structure questions, this exam utilizes a project-based approach. Candidates are provided with an existing codebase and must implement specific interfaces, classes, and methods to satisfy progressive test cases.
Problem Statement: Complete Banking System Implementation
Level 1: Basic Operations Implement core functionality for account and fund management: * createAccount(accountId, timestamp): Initialize new user accounts. * deposit(accountId, timestamp, amount): Add funds to specific accounts. * transfer(fromId, toId, timestamp, amount): Execute fund transfers between accounts.
Level 2: Ranking Analytics Implement logic to track and retrieve high-volume users: * topSpenders(timestamp, n):
Return the top N accounts based on total outgoing transactions. Results must be sorted by amount (descending), utilizing the account ID (ascending) as a tie-breaker.
Level 3: Scheduled Payments & Cashback Implement features for deferred transactions and rewards processing: * schedulePayment(...): Queue payments with specific parameters, including cashback percentages. * getPaymentStatus(...): Query the current state of a specific payment (scheduled, processed, or failed). * processScheduledPayments(currentTimestamp): Execute queued payments that are due and apply relevant cashback logic.
Level 4: Account Merging Implement complex state modification for consolidating users: * mergeAccounts(accountId1, accountId2): Merge two distinct accounts by combining their current balances and unifying their entire transaction histories.
About Ebay Interview Reports
This question was reported by a candidate who interviewed at Ebay. LeakCode aggregates interview reports from 10+ sources, including 1Point3Acres, Glassdoor, LeetCode Discuss, Blind, Reddit, Indeed, and Nowcoder. Each report is translated where necessary, deduplicated against existing entries, and tagged by company, role, round type, and reporting date.
Use this question as one calibration data point, not a memorization target. Companies typically rotate their question pools every 2-4 months; the exact wording of a 2024 question may differ from what you encounter today. The underlying pattern, difficulty level, and follow-up depth at Ebay are the higher-signal extractions to take from this report.
For broader preparation context, the Ebay interview process typically includes a recruiter screen, one or two technical phone screens, and a 4-5 round on-site loop covering coding, system design (at L4+ levels), and behavioral. Reports tagged on LeakCode show the round-by-round distribution and typical difficulty calibration. To browse questions filtered by round type and seniority, use the company hub linked above.
How To Practice This Type of Question
Solve similar problems on LeetCode under timed conditions (25-35 minutes per medium difficulty). The goal is pattern recognition: recognize the underlying technique (sliding window, two-pointer, BFS, memoized recursion, etc.) within 60-90 seconds of reading. Strong candidates verbalize their hypothesis out loud before coding, then iterate based on feedback. Weak candidates dive into implementation immediately, lose time on the wrong approach, and run out of time for follow-ups.
Companies update their question pools every 2-4 months. The exact wording of any given question may have been retired by the time you interview. Focus your prep on the pattern, not the specific problem. The patterns that appear in Ebay reports consistently are the ones worth investing in; one-off niche problems are not.
During Your Ebay Round
Apply the standard interview round template: clarify requirements (2-3 minutes), state your approach out loud and confirm direction with the interviewer (3-5 minutes), code with narration (15-25 minutes), test with concrete examples including edge cases (5 minutes), discuss optimization or trade-offs if time permits (5 minutes). This template is universally accepted across FAANG and adjacent companies; deviating from it produces weaker interviewer feedback signal.
The single most predictive failure mode in Ebay reports tagged "no hire": not asking clarifying questions. Interviewers are explicitly trained to weight this. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's written notes.