Machine Learning Engineer + Data Scientist + Software Engineer Interview Questions
Practice the exact questions companies are asking right now.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Design a Top Dasher experiment with interference
Practice designing an interference-aware experiment for a Top Dasher incentive program in a delivery marketplace. The solution covers goal setting, zo...
Tiktok DS Interview Questions
Scenario: You are provided with two tables: minute_streamed and minute_viewed. The minute_streamed table records each minute of streaming activity, wh...
In-Memory Key-Value Database with Nested Transactions
In-Memory Key-Value Database with Nested Transactions Implement an in-memory key-value database that processes a sequence of commands and supports nes...
Constant-Time Insert, Remove, and Uniform Random Sampling
A data-sampling service maintains a dynamically changing pool of integer example IDs. Examples are continuously added and retired, and the service mus...
Fill Missing Time-Series Values with Linear Interpolation (Duplicate Timestamps Allowed)
Fill Missing Time-Series Values with Linear Interpolation (Duplicate Timestamps Allowed) You are given readings from a single sensor as a list of reco...
Delete a Node From a Search Tree
Given the root of a binary search tree and an integer key, delete the node whose value equals key if it exists. Return the possibly new root while pre...
[SQL] Job Ad Metrics with Applicant Filter
Job Ad Metrics Analysis Task Table Structure Table: job_activity job_id INT candidate_id INT activity_type VARCHAR -- can be 'view' or 'apply' Requi...
Solve prefix, array, and string problems
This set of problems evaluates proficiency in string and array algorithm design—covering prefix search, subsequence matching, and maximal-area computa...
Find Most Frequent Values
Given an integer array nums and an integer k, return the k distinct values that occur most frequently in nums. The result may be returned in any order...
Solve a Three-Roll Optimal Stopping Game
Solve a Three-Roll Optimal Stopping Game A fair six-sided die may be rolled at most three times. After each of the first two rolls, stop and receive t...
Price a Sequential Four-Box Search Game
Price a Sequential Four-Box Search Game Four boxes contain one \$100 prize. Each opening costs the same fee x; you choose an unopened box and may stop...
Design experiment and analyze volume drop scenario
Design an activation experiment for first-trade rate and investigate a retail trading volume drop despite higher BTC volatility. The solution covers A...
Write SQL for 30-day activity and D7 retention
You are given two tables. Table: trades - user_id (BIGINT) - trade_time (TIMESTAMP) — timestamp of the trade - volume (NUMERIC) - asset (TEXT) Table: ...
Implement sampling and subarray scan
A coding interview included the following algorithm questions: 1. You are given access to a function rand01() that returns an independent sample from ...
Implement IPv4 and CIDR iterators
This question evaluates understanding of IPv4 addressing and CIDR notation, along with competency in binary/bitwise arithmetic, iterator construction,...
Find the Expected Number of Record Maxima
A permutation of the distinct values 1 through 100 is revealed from left to right. Replace the current maximum whenever the revealed value is strictly...
Update Box Probabilities After Drawing Red Balls
Three boxes are equally likely to be selected: - Box A contains two red balls. - Box B contains one red and one blue ball. - Box C contains two blue b...
Derive the Long-Run Sex Ratio Under a Stopping Rule
Assume each child is independently equally likely to be a girl or a boy. Every family continues having children until its first boy, then stops. For a...
Count super-streak segments in an event stream
You are given a time-ordered sequence of events. Each event has: - type, a string or integer event type. - ts, an integer timestamp in milliseconds or...
Reach a Target Using Each Number At Most Once
Reach a Target Using Each Number At Most Once You are given an array of integers nums and an integer target. Decide whether you can build an arithmeti...