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."
Explain tokenization and Transformer variants
Tokenization and Transformer Architecture Deep Dive You are asked to explain common tokenization approaches and modern Transformer design choices used...
Fetch and parse JSON from REST API
Question Set up a minimal coding environment from scratch and write runnable code that fetches and processes data from a REST API. You are given an en...
Implement a longest-match tokenizer
This question evaluates string-processing and algorithmic implementation skills for greedy longest-match tokenization, including handling runs of unma...
Find optimal commute mode in a city graph
You are designing a route planner that suggests the best way to commute between two points in a city using different transportation modes. The city is...
Explain CAP, indexing, locks, and logs
This question evaluates knowledge of distributed systems concepts (CAP theorem), database internals (index types and logging), and concurrency control...
Design a fraud mitigation strategy under constraints
You are given a one-page case during a hiring manager round for a Fraud Data Scientist role. Current state: - The existing fraud model is performing p...
Implement list, form, and API rendering with pitfalls
Take-home: Build a Small Frontend App (List + Form + API + A11y) Goal Implement a simple web app that demonstrates core frontend skills: rendering fro...
Count User Journey Prefixes
This question evaluates the ability to reconstruct per-user action sequences from timestamped logs, aggregate and count path prefixes, and apply data-...
Implement fast power and k-palindrome
This question evaluates numerical algorithm design and string algorithm skills, focusing on efficient exponentiation with negative exponents and deter...
Schedule Ready Tasks by Deadline
You are building a workflow scheduler. Each task has: - a unique task_id - an integer deadline - an optional list of prerequisite tasks that must be c...
Maximum Profit from Multi-Stock Trading Records
Maximum Profit from Multi-Stock Trading Records You are given a list of stock price records collected from a trading feed. Each record is a triple: - ...
Design a package installer with dependencies
This question evaluates understanding of package management and dependency resolution, including version constraints, detection of missing packages, c...
Describe building a professional relationship
Behavioral Prompt: Building a Strong Working Relationship Context: Behavioral question for a Data Scientist interview. Aim for a concise, impact-focus...
Design a flight search platform
This question evaluates understanding of distributed systems, API and data model design, large-scale data ingestion and indexing, search ranking and c...
Find closest value to a target in a BST
Problem Given the root of a binary search tree (BST) and a floating-point number target, return the value in the BST that is closest to target. If the...
Compute specialty spend share and top age band
You are given healthcare claims data split across member tables. Tables Assume the following schemas (types may be adapted to your SQL dialect): mem1 ...
Deduce row order from logic clues
Logic Ordering Puzzle: Four Coworkers in a Row Context Four coworkers—A, B, C, and D—are standing in a single row, left to right, facing north. Positi...
Walk through your resume and impacts
Walk through your resume and impacts Behavioral Prompt: Walk Through Your Resume (Technical Screen) You are interviewing for a Software Engineer role ...
Fix and harden an object pool
Fix and harden an object pool Refactor a Buggy C++ Object Pool Into a Correct, Thread-Safe Template Context You are given a buggy C++ object pool that...
Design a CreditTracker with expirations
Design a CreditTracker class with three methods: ( 1) add_credit(start_time, end_time, credit), ( 2) subtract_credit(time, credit), and ( 3) check_cre...