最近帮学员经历了一次 Epic System 的笔试+电面，整体下来发现这个流程的套路感很强，尤其是 OA，如果不提前刷题，很容易被时间卡住。所以我想把这次学员的体验整理成一篇完整分享，包含 OA 各个模块的拆解、真题示例和题解、电面高频问题以及答题思路，给之后准备 Epic 的同学一个参考。
Epic Online Assessment 题型分布
Epic 的 OA 一共四个部分，顺序不固定，可以自由选择先做哪一块，但进入之后必须做完，整个过程会全程录屏+录音+开摄像头。允许使用草稿纸。
- 2min 填空选择：逻辑 + 数学混合题，每题两分钟，非常紧张。
- Math：题库原题或变体，部分像脑筋急转弯。
- 逻辑选择填空：和 OA self test 几乎一模一样，顺序都一样。
- Programming：共四道题，题库改写，文字描述很长，考熟悉度；没有 test case。
OA 真题分享 | 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).
电面部分
Epic 的电面整体上属于 behavioral interview ，氛围相对轻松，但考察点很明确：你的动机、沟通能力、长期发展方向。面试时间大概在 30–40 分钟，主要问题集中在以下几类：
1. Why Epic
重点是展现你对公司使命的认同。Epic 的业务是做医疗信息系统，关键词可以围绕 impact on healthcare, improving patient outcomes, large-scale system reliability。
学员反馈里提到，如果能提前了解 Epic 的项目（比如 MyChart、EpicCare），答题更有说服力。
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 and doctors every day. I want to be part of a team where my code can directly improve people’s lives.”
2. Why this position
回答时要强调 技能和岗位要求的匹配，而不是泛泛而谈。比如 SDE 岗，就可以强调 problem solving, scalability, software reliability。
学员反馈说，面试官会追问细节，比如你具体在哪个项目中体现了这些能力。
3. Career Goal
Epic 比较看重候选人的 长期稳定性，他们希望你能在公司成长而不是短期跳槽。
回答时可以讲你希望成为 technical expert 或 team leader，同时保持和医疗行业的联系。
4. Project + Challenge
这是最容易展开的部分，一定要用 STAR（Situation, Task, Action, Result）来组织。
学员反馈里提到，如果项目挑战部分能结合“沟通+技术”双重难点，效果最好。比如：需求模糊、数据质量差、团队沟通障碍。
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.”
不再一个人战斗，高压流程下的安心保障
很多同学第一次碰到 Epic 的 OA，都会觉得有点慌：题目多、时间紧、没有 test case，再加上全程录屏摄像头压力很大，很容易因为紧张而失误。电面看似简单，但其实面试官会不断追问细节，如果准备不充分，很容易被问到卡壳。
我们 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 部分可以通过实时语音提醒，帮你在关键时刻理清思路，避免浪费 precious minutes。
电面部分我们会提前 mock，对常见 BQ 提供反馈，甚至帮你抓住细节亮点，让回答更真实自然。
有学员反馈说：
“如果没有你们的语音助攻，我在编程题第三题绝对会卡半天。还有电面 mock 也很关键，真实面试时追问的点我都提前演练过了。”
在准备 Epic 这种考试节奏快、考察点多的流程时，你真的不需要孤军奋战。
