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."
Implement a sliding-window rate limiter
Implement an in-memory sliding-window rate limiter. You are given a stream of requests, each with a timestamp in milliseconds. Part 1: Per-user limit ...
Determine Whether a Binary Tree Is a Valid BST
Determine Whether a Binary Tree Is a Valid BST Problem Given a binary tree, determine whether the entire tree satisfies the strict binary-search-tree ...
Design Telehealth Consultation Queue
Design a web-based queuing application for a health-insurance company that offers free 24/7 telehealth access to its members through a website and mob...
Solve Subarray Sum and Local Minimum
Two coding problems were reported in the same phone-screen round: 1. Count target-sum subarrays. Given an integer array nums and an integer k, return ...
Highlight Exact Source Matches
You are given a string text and a list of strings sources. For every exact occurrence of any string in sources within text, wrap the matched character...
When prioritize precision vs recall
Context You are working on a product team and building (or evaluating) a binary classifier that triggers an action (e.g., show a warning, block conten...
How would you build UberEats ranking?
This question evaluates machine learning and recommender-systems competencies for ranking in a food delivery marketplace, covering problem formulation...
Design training for multimodal embedding model
This question evaluates proficiency in end-to-end multimodal embedding system design, including model architecture, supervision and loss strategies, e...
Compute minimum path sum in a triangle
This question evaluates proficiency in dynamic programming and algorithmic problem-solving within the Coding & Algorithms domain, focusing on handling...
Design a weapon-ad harmful content detection system
This question evaluates skills in end-to-end system design and applied machine learning for multi-modal harmful content detection, covering scalabilit...
Deep copy a linked list with random pointers
This question evaluates understanding of linked-list structures, pointer/reference manipulation, deep versus shallow copying, and the ability to analy...
Explain AWS access control and frontend typing
This question evaluates cloud infrastructure and access control (EC2, S3 pre-signed URLs, IAM), frontend React fundamentals (hooks and common pitfalls...
Answer Dive Deep and Ownership in LP interview
Behavioral (Amazon LP): Dive Deep & Ownership The interviewer will probe your prior work and may connect follow-ups to the technical discussion. Promp...
Design a cloud database write path and recovery
This question evaluates expertise in designing transactional write paths and crash recovery for cloud-native relational databases that separate comput...
Serialize and deserialize a binary tree
This question evaluates competency in designing robust serialization formats and manipulating binary tree data structures, including preservation of s...
Return a topological ordering of a graph
This question evaluates understanding of graph algorithms—particularly topological sorting and cycle detection—and competency in ordering dependencies...
Build a hit/miss word guessing game
This question evaluates implementation skills in managing stateful systems and data structures for pattern matching, as well as algorithmic and advers...
Determine whether two nodes are related
This question evaluates understanding of graph representations, reachability and connectivity concepts for ancestry relationships, including handling ...
Coordinate workers across two exclusive targets
This question evaluates proficiency in concurrent programming and synchronization, focusing on safe resource coordination, mutual exclusion, utilizati...
Implement a rate limiter at scale
This question evaluates understanding of algorithmic and system-level design for per-key rate limiting, including data structures, time/space complexi...