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."
Compute Courier Delivery Pay
This question evaluates a candidate's ability to work with time-interval arithmetic, interval union/overlap reasoning, and aggregation of time-based p...
Implement one-cluster k-means
This question evaluates understanding of clustering algorithms and optimization of within-cluster squared error for the special case k = 1, along with...
Implement Document Predicate APIs
Design a simple document service that stores text documents identified by filename. Implement these APIs: - InsertDoc(filename, content): store or ove...
Implement obstacle-course run statistics
You are given a TypeScript codebase for tracking race results on an obstacle course. - A Course has a fixed number of obstacles. - A Run stores the ti...
Determine Exact Layover Booking
This question evaluates a candidate's competency in algorithmic problem solving, numerical precision handling, and combinatorial selection under exact...
Count People Reaching the Boundary
You are given a 1-dimensional line segment with a right boundary at position L. There are N people with initial positions p1, p2, ..., pN, and there i...
Build a File-Backed Key-Value Store
This question evaluates a candidate's understanding of persistent key-value storage, in-memory versus on-disk state management, serialization/deserial...
Implement Terminal Tabs and Split Panels
Implement a data structure that models a terminal application with multiple tabs and split panels. Requirements: - A Terminal can create and store mul...
Implement Chat Event Counter
Design an in-memory counter for chat activity. You need to implement a class with the following two methods: `text processEvent(userId: string, chatId...
Find the Next Larger Palindrome
Given a positive integer n, return the smallest integer strictly greater than n whose decimal representation is a palindrome. A palindrome reads the s...
Implement SQL Table and DNA Ordering
Two independent coding exercises were asked. Solve both. Problem A: CSV-backed in-memory table Build a tiny in-memory relational table initialized fro...
Design a High-Frequency Job Scheduler
This question evaluates competency in distributed systems design, scheduling semantics (including high-frequency and recurring jobs), durable job stor...
Print a Centered Pascal Triangle
Given a positive integer height, generate the first height rows of Pascal's triangle and print them as a centered text triangle. Formatting requiremen...
Simulate and Construct Tournament Rankings
You are given a single-elimination tournament represented by an array of ranks. The array is a permutation of the integers 1..n, where a smaller numbe...
Solve Union-Find, Graph, and Stream Problems
Solve the following independent coding problems. 1. Merge Product Categories You are given a list of tuples (productA, productB). Each tuple means the...
Find the Critical Path
You are given a project represented as a directed acyclic graph of tasks. Each task has: - a unique task name - a list of prerequisite task names - a ...
Build a Pivot Table Aggregator
Implement a function that builds a pivot table from a list of records. Each record contains a row_key, a column_key, and a numeric value. Requirements...
Solve Two Coding Interview Problems
You are asked to solve two independent coding problems. Problem 1: Evaluate Nested Math Expressions Implement a function that evaluates a string expre...
Solve Linked-List and Iterator Problems
You are asked to solve two coding problems. Problem 1: Detect shared nodes between possibly cyclic linked lists You are given the heads of two singly ...
Find Shortest Paths to Target Nodes
You are given a weighted directed graph representing distances between nodes. - There are n nodes labeled from 0 to n - 1. - edges[i] = [u, v, w] mean...