Snowflake 是一家以数据仓库技术起家的顶级独角兽,主打“数据即服务”,近年来在北美求职市场上备受追捧。而它的招聘流程中,OA 就是第一道大门,很多人止步于此,不是因为实力不够,而是准备不对!这篇来自 Programhelp 联机协助学员的真实记录,涵盖题目重现 + 解题思路 + 技术点分析 + 联机实录全过程。适合准备 DS、DE、SWE 等技术岗,干货拉满。

学员背景介绍:理工 DS,美硕毕业,时间紧迫
这位学员是美国硕士背景,专业偏数据科学,毕业半年左右。当时正在准备多家公司 VO,但 Snowflake OA 邀请突然来袭,只有 5 天有效期。
学员反馈:「自己 LeetCode 刷得还可以,但面对 Karat 风格题有些没底,怕复杂度写炸了又没时间 debug。」
最终在朋友推荐下找到了我们 Programhelp,选择了我们的“联机语音辅助服务”方案,由技术导师同步远程观察页面 + 实时语音策略提醒,不改动代码,不留痕迹,真正做到安心上分。
Snowflake OA 面试过程详解
OA 基本信息
平台:Snowflake 的 Online Assessment 是通过 Karat 平台进行的,整个过程是交互式录屏 + 自动测试系统,平台会同步录制代码编写过程和屏幕操作,防止作弊。界面整洁,测试反馈及时,但需要保持全程专注、操作流畅,避免被误判为非正常行为。
时间限制:总时长为 70 分钟,进入界面后即开始计时,无法暂停或返回。每道题分配时间紧凑,尤其第二题逻辑较重,建议合理规划答题节奏。
题目数量与难度:共有三道编程题,题目描述为纯英文形式,语言较为口语化但逻辑严谨,部分测试样例设置得较为“刁钻”,容易踩坑。第一题多为中等难度,考察基础算法(如 hashmap、prefix sum、排序等),第二题偏向工程逻辑或高级数据结构(如 Trie、heap、segment tree)建模实现。
编程语言支持:允许使用 Python、Java、C++、Go,平台支持语法高亮和自动格式化。我们通常建议学员选择最熟悉的语言,以提升代码书写效率和调试成功率。
Snowflake OA 真题复现
1|Remove Stones to Minimize the Total
Problem Description:
You are given a 0-indexed integer array piles
, where piles[i]
represents the number of stones in the ith pile, and an integer k
. You must perform the following operation exactly k
times:
- Select any
piles[i]
and removefloor(piles[i] / 2)
stones from it.
Note: You may perform this operation on the same pile more than once.
Return the minimum possible total number of stones remaining after performing k
operations.
Example 1:
Input:piles = [6, 3, 10]
, k = 2
Output: 11
Explanation:
- Operation 1: Choose pile 2 → [6, 3, 5]
- Operation 2: Choose pile 0 → [3, 3, 5]
- Total = 3 + 3 + 5 = 11
Constraints:
- 1 <=
piles.length
<= 105 - 1 <=
piles[i]
<= 104 - 1 <=
k
<= 105
2|Find the Maximum Length of a Good Subsequence I
Problem Description:
You are given an integer array nums
and a non-negative integer k
. A sequence is called good if there are at most k
indices i
such that seq[i] != seq[i + 1]
.
Return the maximum possible length of a good subsequence of nums
.
Example 1:
Input:nums = [2, 2, 1, 3, 3]
, k = 1
Output: 3
Explanation: The longest valid subsequence could be [2, 2, 2] or [3, 3, 3].
Example 2:
Input:nums = [1, 2, 3, 1, 2]
, k = 0
Output: 1
Only completely identical values can appear when k = 0
.
Constraints:
- 1 <=
nums.length
<= 500 - 1 <=
nums[i]
<= 109 - 0 <=
k
<= min(nums.length
, 25)
3|Efficient Deployments
Problem Description:
A supercomputer has n
processors arranged in a line from 1 to n
. Each processor has a different efficiency depending on whether its adjacent processors have been deployed before it:
- If neither neighbor is deployed before it, efficiency =
no_adjacent[i]
- If one neighbor is deployed before it, efficiency =
one_adjacent[i]
- If both neighbors are deployed before it, efficiency =
both_adjacent[i]
Note: The first and last processors have only one adjacent.
Find the maximum total efficiency over all possible deployment orders.
Example:
Input:no_adjacent = [2, 1, 4, 5]
one_adjacent = [6, 2, 3, 2]
both_adjacent = [0, 2, 1, 0]
Output: 17
Explanation: One possible deployment order is (4 → 3 → 2 → 1): Total = no_adjacent[4] + one_adjacent[3] + one_adjacent[2] + one_adjacent[1] = 5 + 3 + 2 + 6 = 16. The optimal yields 17.
Constraints:
- 2 <=
n
<= 105 - 1 <=
no_adjacent[i]
,one_adjacent[i]
,both_adjacent[i]
<= 109
面试本质,是信息差的对抗
很多人并不是不会写代码,而是不熟悉流程、不了解平台、不知道重点考点。
Programhelp 的服务,不是「代替你」,而是「解放你的注意力」——让你在更轻松、更高效、更安全的条件下完成重要考试和面试!
我们为 Snowflake、Databricks、Amazon、TikTok、Meta 等大厂提供:
OA远程无痕代写:工程师远程登陆考试平台,全程无鼠标移动记录;
VO语音实时提醒:由导师联机协助,边写代码边提醒关键细节与陷阱;
模拟测评 + 真题分析:针对不同公司题库提供定制训练;
VO 模拟陪练:还原面试官风格,训练答题思路与逻辑表达;
Snowflake 只是开始,我们帮助过的学员已进入 Amazon、Databricks、ByteDance、LinkedIn 等核心团队,你也可以!