最近幫學員經歷了一次 Epic System 的筆試+電面，整體下來發現這個流程的套路感很強，尤其是 OA，如果不提前刷題，很容易被時間卡住。 所以我想把這次學員的體驗整理成一篇完整分享，包含 OA 各個模組的拆解、真題示例和題解、電面高頻問題以及答題思路，給之後準備 Epic 的同學一個參考。
Epic Online Assessment 題型分佈
Epic 的 OA 一共四個部分，順序不固定，可以自由選擇先做哪一塊，但進入之後必須做完，整個過程會全程錄屏+錄音+開攝像頭。 允許使用草稿紙。
- 2min 填空選擇：邏輯 + 數學混合題，每題兩分鐘，非常緊張。
- Math：題庫原題或變體，部分像腦筋急轉彎。
- 邏輯選擇填空：和 OA self test 幾乎一模一樣，順序都一樣。
- Programming：共四道題，題庫改寫，文字描述很長，考熟悉度; 沒有 test case。
OA 真題分享 | | Epic Online Assessment Questions
👉 2min Fill-in-the-Blank
Q1.
If A is older than B, B is older than C, and C is older than D, who is the youngest?
Solution:
Obvious ordering A > B > C > D, so the youngest is D.
Q2.
A train travels 60 miles in 1.5 hours. What is the average speed?
Solution:
60 ÷ 1.5 = 40 miles/hour.
👉 Math Section
Q1.
A box contains 5 red, 4 blue, and 3 green balls. If one ball is chosen at random, what is the probability that it is not red?
Solution:
Non-red = 4 + 3 = 7, total = 12 → Probability = 7/12.
Q2.
If it takes 5 machines 5 minutes to make 5 items, how long will it take 100 machines to make 100 items?
Solution:
One machine makes 1 item in 5 min.
So 100 machines make 100 items also in 5 minutes.
👉 Logic Multiple-Choice
Q1.
All squares are rectangles. Some rectangles are circles. Which of the following must be true?
A. All circles are squares
B. Some squares are circles
C. Some rectangles are squares
Solution:
All squares are rectangles, so option C is correct.
Q2.
If the first two statements are true, is the last statement true?
- All doctors are professionals.
- Some professionals are teachers.
- Therefore, some doctors are teachers.
Solution:
The conclusion does not follow logically → False.
👉 Programming Section
Q1. Simulate 9-key typing (T9 predictive text)
- You are given a mapping of digits (2–9) to letters, like on a phone keypad.
- Input is a string of digits, output all possible letter combinations.
Solution Idea:
Backtracking / DFS to generate combinations.
Time complexity: O(3^n) where n = length of digit string.
Q2. Longest Consecutive Sequence
- Given an unsorted array of integers, return the length of the longest consecutive sequence.
- Example:
[100, 4, 200, 1, 3, 2] → 4(sequence is[1,2,3,4]).
Solution Idea:
Use a hash set for O(1) lookup. For each number, expand left and right if possible, track max length.
Time complexity: O(n).
Q3. Balanced Brackets
- Input: string with characters
()[]{} - Output: true if brackets are balanced, false otherwise.
Solution Idea:
Stack-based solution: push opening bracket, pop when matching closing appears.
Time complexity: O(n).
Q4. Matrix Rotation
- Given an N×N matrix, rotate it 90 degrees clockwise in-place.
Solution Idea:
- Transpose the matrix
- Reverse each row
Time complexity: O(n²).
電面部分
Epic 的電面整體上屬於 behavioral interview ，氛圍相對輕鬆，但考察點很明確：你的動機、溝通能力、長期發展方向。 面試時間大概在 30–40 分鐘，主要問題集中在以下幾類：
1. Why Epic
重點是展現你對公司使命的認同。 Epic 的業務是做醫療資訊系統，關鍵詞可以圍繞 impact on healthcare, improving patient outcomes, large-scale system reliability。
學員反饋里提到，如果能提前瞭解 Epic 的專案（比如 MyChart、EpicCare），答題更有說服力。
示例回答思路：
“I want to work at Epic because it has a unique impact on the healthcare industry. The systems you build are used by millions of patients anddoctors every day. I want to be part of a team where my code can directly improve people’s lives.”
2. Why this position
回答時要強調 技能和崗位要求的匹配，而不是泛泛而談。 比如 SDE 崗，就可以強調 problem solving, scalability, software reliability。
學員反饋說，面試官會追問細節，比如你具體在哪個專案中體現了這些能力。
3. Career Goal
Epic 比較看重候選人的 長期穩定性，他們希望你能在公司成長而不是短期跳槽。
回答時可以講你希望成為 technical expert 或 team leader，同時保持和醫療行業的聯繫。
4. Project + Challenge
這是最容易展開的部分，一定要用 STAR（Situation， Task， Action， Result）來組織。
學員反饋里提到，如果項目挑戰部分能結合「溝通+技術」雙重難點，效果最好。 比如：需求模糊、數據品質差、團隊溝通障礙。
示例回答思路：
Situation: “In my last project, I worked on a patient data visualization tool.”
Task: “The challenge was that the dataset was incomplete and inconsistent.”
Action: “I collaborated with the data team to define cleaning rules, built validation scripts, and set up automated error detection.”
Result: “We reduced missing data issues by 40% and the tool was adopted by multiple departments.”
不再一個人戰鬥，高壓流程下的安心保障
很多同學第一次碰到 Epic 的 OA，都會覺得有點慌：題目多、時間緊、沒有 test case，再加上全程錄屏攝像頭壓力很大，很容易因為緊張而失誤。 電面看似簡單，但其實面試官會不斷追問細節，如果準備不充分，很容易被問到卡殼。
我們 programhelp 团队已经陪跑过不少同学的 Epic 流程，提供过 远程无痕面试助攻：
OA 部分可以通過即時語音提醒，幫你在關鍵時刻理清思路，避免浪費 precious minutes。
電面部分我們會提前 mock，對常見 BQ 提供反饋，甚至幫你抓住細節亮點，讓回答更真實自然。
有學員反饋說：
“如果沒有你們的語音助攻，我在程式設計題第三題絕對會卡半天。 還有電面 mock 也很關鍵，真實面試時追問的點我都提前演練過了。 ”
在準備 Epic 這種考試節奏快、考察點多的流程時，你真的不需要孤軍奮戰。
