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."
Decide string transform with directional tokens and walls
Decide string transform with directional tokens and walls You are given two equal-length strings start and target of length n, each consisting only of...
Implement uniform sampling in squares
Implement uniform sampling in squares Implement a class Square representing an axis-aligned square on the 2D plane that supports sampling a uniformly ...
Design a key-value store with getLast
Design a key-value store with getLast Design and implement an in-memory key–value store with this API: add(key, value), get(key), remove(key), and get...
Implement sparse vector dot product and cosine similarity
Sparse Vector Class Implement a SparseVector class for high-dimensional vectors where most entries are zero. Representation Assume each vector has: - ...
Maximize number with one digit swap
Maximize number with one digit swap Given a non-negative integer n (as an int or string), perform at most one swap of two digits to produce the maximu...
Design 2D DP on a DAG
Design 2D DP on a DAG Given a directed acyclic graph G(V, E) with N nodes, M edges, a designated source s, and an integer L, design a 2D dynamic progr...
Brainstorm a business problem approach
Brainstorm a business problem approach Analytics & Experimentation Brainstorm (Scenario Provided) Context You are evaluating a feature proposal for a ...
Group employees by shared interests
Given N employees, each with an integer id and a set of interests (strings), write an algorithm to find all employees who share at least one common in...
Write complex SQL for cohorts and retention
Given tables users(uid, created_at, country), orders(order_id, uid, amount, created_at, status), and events(uid, ts, event_type, campaign), write one ...
Evaluate arithmetic expression without parentheses
Evaluate arithmetic expression without parentheses Write evaluate(s: string) to compute the value of an arithmetic expression containing non-negative ...
Analyze New Shops' Activity Compared to Existing Ones
shops +---------+------------+---------------+ | shop_id | created_at | category | +---------+------------+---------------+ | 1 | 2024-01-0...
Explain Python Virtual Environment Setup and Function Analysis
Scenario Technical screen where candidate and interviewer jointly walk through Python code snippets used in a data-science repository. Question Show h...
Describe Leading Without Authority in Data Management
Behavioral Interview: Leading Without Authority in Data Management You will be assessed on cultural fit and how you operate in ambiguous, messy data e...
Sample and Simulate Price Adjustments in R with dplyr
Products +----+-----------+-------+ | id | product | price | | 1 | phone | 500 | | 2 | tablet | 300 | | 3 | laptop | 1000 | | 4 |...
Compute Averages of Unique Numbers in Dictionary Lists
Scenario Python tech screen: given a dictionary mapping keys to numeric lists, e.g., {'a':[1,2,1],'b':[1,2,3]}, compute the average of each list after...
Evaluate Factors Before Replacing Recommendation Model
Evaluate Factors Before Replacing a Recommendation Model A large ads platform has built a new recommendation or ranking model and plans to deprecate t...
Analyze VR App Usage and Engagement Metrics
vr_usage +---------+------------+---------+------------+----------+ | user_id | date | app_id | session_id | duration | +---------+------------...
Impact of parents joining Facebook on teen engagement
Parental Presence and Teen Engagement on Facebook Facebook's teen audience overlaps increasingly with parents, who may friend their children, comment ...
Determine Facebook's Restaurant Recommendation Viability Using Data
Determine Facebook's Restaurant Recommendation Viability Using Data Facebook may launch a restaurant-recommendation product that helps people discover...
Solve Data Structure Challenges with Python Algorithms
Scenario You are given coding challenges in Python to manipulate simple data structures. Question Remove duplicates from a list of integers while pres...