Snowflake A top unicorn that started with data warehouse technology and focuses on "data as a service" has been highly sought after in the North American job market in recent years. In its recruitment process, OA is the first door, and many people stop here, not because of insufficient strength, but the wrong preparation! This is a real record from Programhelp online assistance students, covering the whole process of topic reproduction + problem solving ideas + technical point analysis + online recording. Suitable for preparation for DS, DE, SWE and other technical posts, dry goods pull full.
Background of the student: Polytechnic DS, graduated from American Master's Degree, time is running out.
This student has a master's degree from the US, specializing in data science, and graduated about half a year ago. At that time, he was preparing for the VO of several companies, but the Snowflake OA invitation came out of the blue and was only valid for 5 days.
Feedback from students: "I've done OK with LeetCode, but I'm not sure about Karat style questions, I'm afraid of blowing up the complexity and I don't have time to debug them."
Finally, on the recommendation of a friend, he found us at Programhelp and chose our "Online Voice Assisted Service" program, which consists of a synchronized remote viewing page + real-time voice strategy reminders by a technical tutor, without changing the code or leaving any traces, so that he can score points with peace of mind.
Snowflake OA Interview Process Explained
OA Basic Information
flat-roofed buildingSnowflake's Online Assessment is conducted through the Karat platform, the whole process is interactive screen recording + automatic testing system, the platform will synchronize the recording of the code writing process and screen operation to prevent cheating. The interface is clean and the test feedback is timely, but you need to stay focused and operate smoothly to avoid being misjudged as abnormal behavior.
time limitThe total time is 70 minutes, and the timer starts as soon as you enter the interface, so there is no way to pause or go back. The time allocated for each question is tight, especially for the second question, which is more logical, so it is recommended to plan the pace of answering the questions wisely.
Number and Difficulty of TopicsThere are three programming questions, the description of the topic for the pure English form, the language is more colloquial but logical rigorous, part of the test samples set up more "tricky", easy to step on the pit. The first question is mostly of medium difficulty, examining basic algorithms (such as hashmap, prefix sum, sorting, etc.), and the second question is biased towards engineering logic or advanced data structures (such as Trie, heap, segment tree) modeling implementation.
Programming Language Support: Python, Java, C++, Go are allowed, and the platform supports syntax highlighting and automatic formatting. We usually recommend students to choose the most familiar language to improve code writing efficiency and debugging success rate.
Snowflake OA Real Questions Repeat
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. The optimal yields 17.
Constraints.
- 2 <=
n<= 105 - 1 <=
no_adjacent[i],one_adjacent[i],both_adjacent[i]<= 109
Interviews are, by their very nature, a confrontation of poor information
It's not that many people don't know how to write code, it's that they are unfamiliar with the process, the platform, and the key test points.
Programhelp A service that doesn't 'replace you' but 'frees you up' - allowing you to complete important exams and interviews under easier, more efficient and safer conditions!
We deliver for big players like Snowflake, Databricks, Amazon, TikTok, Meta, and more:
OA remote no trace ghostwriting: engineers remote login examination platform, the whole process without mouse movement records;
VO voice real-time reminders: assisted by a tutor online, reminding of key details and pitfalls while writing code;
Simulation assessment + real question analysis: provide customized training for different company question banks;
VO simulation accompaniment: restore the interviewer's style, training answer ideas and logical expression;
Snowflake is just the beginning, and we've helped students who have gone on to core teams at Amazon, Databricks, ByteDance, LinkedIn, and more - and you can too!
