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."
Add Consecutive-Value Bonuses to Grid Paths
Extend the maximum-score grid path with bonuses for equal adjacent values and strictly increasing triples of visited cells. Dynamic programming must r...
Decide Whether an LSTM Is Appropriate for Sequence Data
You are considering an LSTM for a prediction problem with sequential observations. Explain what an LSTM is designed to capture, how you would prepare ...
Implement an in-memory DB with TTL backup/restore
This question evaluates implementation and reasoning skills for an in-memory nested key→field→value store with TTL-based expirations, snapshot backup/...
Handle conflict and missed delivery deadlines
Answer behavioral questions covering: 1. Conflict: Describe a time you had significant conflict with a teammate/stakeholder. What caused it, what did ...
Solve common interview coding problems
This set evaluates algorithmic problem-solving, data structure selection, and time/space complexity analysis across common patterns such as maximum su...
Design a simple API rate limiter
This question evaluates competency in designing scalable, low-latency API rate limiting, covering distributed-systems reasoning, storage and caching t...
Format VARCHAR amounts into $ with M/B suffix
This question evaluates a candidate's ability to perform SQL data manipulation tasks such as string-to-number conversion, conditional scaling and suff...
Produce valid student lineup from parent array
This question evaluates understanding of rooted tree hierarchies, parent-before-child ordering constraints, and lexicographic minimality when construc...
Design a video VLM end-to-end
This question evaluates a candidate's competency in end-to-end design of video vision-language models (VLMs), covering data strategy, model architectu...
Design a job scheduler with SLA and logs
This question evaluates understanding of distributed job scheduling, SLA enforcement, observability, and fault-tolerant execution across worker fleets...
Design a feedback-text personalization data system
System/ML design scenario: personalize using user feedback text You are building an embeddings + personalization pipeline for a consumer product (e.g....
Design an ads ranking ML system
This question evaluates a candidate's ability to design a low-latency ads ranking machine learning system, including feature engineering and freshness...
Implement toy-language types and generic substitution
Problem: Toy Language Type System (Printing + Generic Resolution) You are implementing a small type system for a custom “Toy Language”. Types can be: ...
Analyze Complexity and Probability Basics
This question evaluates understanding of data structures and algorithmic time complexity for hash map operations, the computational complexity of dens...
How do you deliver when time is tight?
Scenario You are assigned a project with an aggressive deadline and limited time/resources. Question How would you ensure the project gets delivered o...
Explain core ML fundamentals and tradeoffs
This question evaluates core machine learning fundamentals including bias–variance tradeoffs, overfitting, class imbalance handling, loss function sel...
Answer Common Behavioral Questions
This question evaluates interpersonal communication, conflict resolution, leadership, self-awareness, and project ownership skills within the Behavior...
Solve Several Algorithm Problems
This collection evaluates proficiency in string processing (longest palindromic substrings), graph connectivity and union‑find style concepts for 2D p...
Analyze profits under random walk and Brownian motion
Analyze profits under random walk and Brownian motion Random-Walk Trading Rules: Expectation and Variance Setup - Let (S_t) be a simple random walk fo...
Analyze Knights-and-Knaves Dialogue Variants
Analyze Knights-and-Knaves Dialogue Variants Knights and Knaves: Two Statements from B Context On an island, every person is either a knight (always t...