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."
Maximize Distinct Values with Cross-Array Swaps
Maximize Distinct Values with Cross-Array Swaps Given arrays a and b of equal length and an integer k, perform at most k swaps. Each swap chooses one ...
Design Multicloud Publishing and API Gateway
This question evaluates understanding of distributed systems and cloud architecture, covering reliable database-to-multicloud event publishing (messag...
Implement log storage and querying
Design a data structure to record log entries and support efficient queries. Each log has a timestamp (milliseconds), severity (INFO/WARN/ERROR), serv...
Describe handling conciseness feedback
Behavioral: Conciseness Feedback and Adaptation Provide a real example where you received feedback that your answers were not concise. Address the fol...
Design and explain infra, K8s, routing, and fleet
System Design and Operations Deep-Dive Context: You are interviewing for a Software Engineer role with a focus on system design and engineering. Provi...
Build searchable list and highlight max transaction
UI Component: Filtered List With Max-Highlight Context Implement a small web UI component (e.g., in a modern frontend framework) that receives an arra...
Design a concurrent web crawler
Question Design and implement a concurrent web crawler. Starting from one or more seed URLs, the crawler should fetch pages, extract links, deduplicat...
Solve coin probability and Bayesian inference problems
Coin-Flip Statistics: Pattern Racing, Runs, and Bayesian Updating You are given three independent questions about fair coin tossing and Bayesian updat...
Cover intro, projects, interest, goals, Go rating
Behavioral & Leadership Technical Screen — Software Engineer (Postman) Context: You are interviewing for a Software Engineer role in a technical scree...
Optimize a compute kernel with a simulator
Performance Optimization Plan for a Compute Kernel Context You are given: - A compute kernel (single critical function or set of loops) to optimize. -...
Review getEvents endpoint for readability, performance, scalability, security
Question You are given a code snippet that implements an HTTP GET /events handler (getEvents). The handler queries events from a database and, for eac...
Demonstrate culture fit and collaboration
Behavioral & Leadership: Culture Fit, Ambiguity, Conflict, Feedback, and Alignment Context: You are interviewing for an onsite Software Engineer role....
Walk through resume and share behavioral examples
Behavioral Prompt — Software Engineer Technical Screen Context: In a technical screen for a Software Engineer role, you are asked to succinctly commun...
Design AI feature launch and data collection
System Design: From AI Prototype to Production Context Assume you are designing a user-facing AI-powered feature for a web/mobile product. Some decisi...
Design at-least-once notification delivery
System Design: At-Least-Once Notification System Context Design a multi-channel notification platform (email, SMS, push, in-app) that guarantees at-le...
Design distributed transactions protocol
System Design: Distributed Transactions Across Multiple Services Context You must design a distributed transactions protocol to coordinate updates acr...
Design executable notebook service APIs
Design: Collaborative Notebook with Executable User Functions (JAR Upload) Context Design a collaborative, browser-based code notebook service. The sy...
Design a GPT chat UI with snapshots and sharing
System Design: End-to-End Web App for Interacting with a GPT-like Model Context You are designing a multi-tenant, browser-based SaaS application that ...
Build and evaluate click prediction models
Click-Through Rate (CTR) Prediction: Build, Compare, and Justify Models Context You are given a tabular dataset for binary click prediction (click = 1...
Optimize switching puzzle solution
Consider a switching puzzle on an m×n grid of lights where toggling a cell flips its state and that of its orthogonal neighbors (Lights Out variant). ...