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 top-N outgoing spenders
Add a feature to report the top N accounts by total outgoing payments across both immediate pays and scheduled payments. Implement: List<String> topNS...
Maximize operations by removing target-sum pairs
Given an integer array nums and an integer T, in one operation you may remove two elements whose sum equals T. Return the maximum number of operations...
Implement a robust shell CLI
Implement a POSIX-compliant shell script invoked as ./script.sh <username> <path_of_file> that outputs a single line formatted as "<timestamp> <licens...
Check path in N-ary tree
Given the root of an N-ary tree and a sequence of integers path[0..k-1], determine whether there exists a path starting at the root whose node values ...
Explain XGBoost depth, regularization, and dropout
ML Conceptual Questions (Onsite) Answer the following: (a) Gradient-boosted decision trees: How does maximum tree depth affect bias/variance, overfitt...
Compute longest increasing subsequence
Longest Increasing Subsequence: length, reconstruction, and counting Given an integer array nums, do all of the following: 1. Length. Compute the leng...
Discuss challenges and cross-functional collaboration
Question Tell me about your most challenging project. Walk me through it end to end and be ready to go deep on the technical and the organizational si...
Determine equality of arbitrarily nested sets
Implement a function that determines whether two arbitrarily nested sets are equal. Sets are unordered and contain no duplicates; elements can be inte...
Determine max remainders and anagram after deletions
Part 1 (Array Remainders): Given an integer array A of length n with A[i] > 0. You may choose any integer array B of length n. Define C[i] = B[i] mod ...
Design video platform and catalog system
System Design: Two Independent Systems You are asked to design two large-scale systems. For each system, provide: - Scope and key requirements - Exter...
Implement rotation, LRU cache, streaming median, cycle detection
Complete the following coding tasks. For each, provide code, justify time/space complexity, and describe edge cases: 1) Image rotation: Given an n×n i...
Solve string dictionary and tree ordering
Part A — One-edit dictionary: Build a data structure supporting build(words: List[str]) and search(query: str) -> bool that returns true if and only i...
Implement encoding validation and grid shortest path
Part A — Byte-encoding validation: You are given an array of integers in [0, 255] representing bytes. Determine whether the sequence encodes valid cha...
Cluster city name variants into canonical entities
Normalize City Names for Vote Aggregation Context You have voting records containing a free-text city field. The same city may appear in many forms (e...
Describe a tough trade-off decision
Behavioral: Tough Trade-off Under Time Pressure (Software Engineer, Technical Screen) You will be asked to describe a specific instance where you made...
Generate split-stay pairs efficiently
Given N Airbnb listings, each with available days as integers, and an inclusive requested date range [L, R], return all ordered pairs (X, Y) of distin...
Generate user notifications from schedules
Given a schedule template format and user profile data (timezone, locale, delivery preferences), implement a program that generates a user notificatio...
Maximize Minimum Scaled Value
This question evaluates algorithmic optimization and resource-allocation skills, focusing on integer scaling under a global budget to maximize the min...
Track Customer Referral Revenue
This question evaluates understanding of dynamic data structure design and algorithms for maintaining aggregated metrics over a referral tree, specifi...
Compute height of tree with deleted nodes; minimize deletions
You are given a rooted tree (not necessarily binary). Each node has a list of children. Some nodes are marked as deleted = true. Define the effective ...