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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
PLTCHK testimonial
PLTCHK

"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"

_The_TaNk_ testimonial
_The_TaNk_

"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"

Chris testimonial
ChrisSenior SWE, LinkedIn

"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."

sleepy33 testimonial
sleepy33

"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."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"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."

Shruti testimonial
ShrutiData Engineer, Salesforce

"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."

midnightramen testimonial
midnightramen

"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."

Bianca testimonial
BiancaFrontend Eng, Figma

"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."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"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."

PLTCHK testimonial
PLTCHK

"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"

_The_TaNk_ testimonial
_The_TaNk_

"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"

Chris testimonial
ChrisSenior SWE, LinkedIn

"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."

sleepy33 testimonial
sleepy33

"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."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"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."

Shruti testimonial
ShrutiData Engineer, Salesforce

"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."

midnightramen testimonial
midnightramen

"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."

Bianca testimonial
BiancaFrontend Eng, Figma

"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."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"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."

Showing 20 results
LinkedIn logo
LinkedIn
Medium
Data Scientist

Train with imbalanced sampled data

You are training a binary classifier on a very large dataset where the positive class is rare. Because the full dataset is too large to train on direc...

Machine Learning
9
0
76 people solved
Sep 5, 2025
Snapchat logo
Snapchat
Medium
Data Scientist

Decide whether to launch Group Story

A new Group Story feature may cannibalize regular stories but increase overall engagement. Propose the experiment and decision framework: 1) Identify ...

Analytics & Experimentation
6
0
65 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Assess Customer Value with Varied Contract Terms and Costs

Subscription Network Service: Customer Value and Contract Terms A subscription network-service provider wants to assess unit economics and portfolio i...

Analytics & Experimentation
111
0
365 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Design an A/B Test for Dashboard Engagement Impact

A/B Test for Energy Dashboard Engagement A product team is launching a redesigned energy-usage dashboard in a consumer app and wants to measure whethe...

Analytics & Experimentation
13
0
63 people solved
Jul 12, 2025
Thumbtack logo
Thumbtack
Hard
Data Scientist

Design and evaluate an A/B test for launch

A/B Test Design: New Matching Model for a Two‑Sided Marketplace Context You are testing a new matching/ranking model that determines which providers a...

Analytics & Experimentation
8
0
75 people solved
Oct 13, 2025
Gemini logo
Gemini
Medium
Data Scientist

Detect k events in a sliding window

Implement an algorithm that, for each user, determines whether there exists a set of at least k ACH credit events from distinct device_ids within any ...

Coding & Algorithms
6
0
62 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Annotating and forecasting a long‑tail distribution

Annotating and Forecasting a Long-tail Distribution You are analyzing daily share counts across many pages on a social platform. The cross-sectional d...

Statistics & Math
24
0
64 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Evaluate the Success of Instagram Checkout

Evaluating Instagram Checkout Instagram Checkout allows users to discover products, add to cart, pay, and manage post-purchase flow without leaving In...

Analytics & ExperimentationLaunch EvaluationBusiness Case Analysis
91
0
114 people solved
Jul 12, 2025
Shopify logo
Shopify
Medium
Data Scientist

Determine Growth of Pirated Theme Installations Over Years

merchants +-------------+------------+ | merchant_id | join_date | +-------------+------------+ | 1 | 2020-01-02 | | 2 | 2020-03-...

Data Manipulation (SQL/Python)
4
0
31 people solved
Aug 4, 2025
Hard
Data Scientist

Detect clickbait without labels, then supervise

Detecting Clickbait Ads Without Labeled Data Context You are asked to detect clickbait ad creatives when there is no labeled training data. You have i...

Machine Learning
4
0
50 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Quantify database bug cost/benefit

Bug Impact on Commission and Admin Costs (Jan–Mar) Context and Assumptions - The company earns commission revenue on user spend; an admin fee is a com...

Statistics & Math
8
0
65 people solved
Oct 13, 2025
Parafin logo
Parafin
Medium
Software Engineer

Discuss leadership and conflicts

Discuss leadership and conflicts Behavioral & Leadership: Collaboration and Conflict Resolution Context You are interviewing for a Software Engineer r...

Behavioral & LeadershipConflict & CollaborationLeadership & Influence
16
0
87 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist

Evaluate Fake-Account Classifier with Precision and Recall Metrics

Evaluate Fake-Account Classifier with Precision and Recall Metrics Evaluating a Fake-Account Classifier in Production Scenario You have trained a mode...

Machine Learning
7
0
60 people solved
Aug 4, 2025
Uber logo
Uber
Hard
Data Scientist Locked

Measure driver experience quantitatively

This question evaluates a data scientist's competencies in designing composite metrics, event-level aggregation, statistical validation, debiasing for...

Analytics & Experimentation
4
0
68 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Data Scientist Locked

Design Biker metrics and A/B test plan

Design an evaluation plan for a pilot bicycle-courier delivery mode in dense urban zones, with one primary efficiency metric, secondary metrics, and g...

Analytics & Experimentation
3
0
37 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software Engineer

Find the kth largest element

Given an unsorted array of n integers and an integer k (1 ≤ k ≤ n), return the k-th largest element without fully sorting the array. Design two method...

Coding & Algorithms
4
0
37 people solved
Aug 12, 2025
TikTok logo
TikTok
Hard
Data Scientist

Explain and tune XGBoost; prevent overfitting

XGBoost Tree Booster: Objective, Hyperparameters, Tuning for Imbalanced Detection, and Post-training Use Context: You are building a binary classifier...

Machine Learning
6
0
84 people solved
Oct 13, 2025
Intercontinental Exchange logo
Intercontinental Exchange
Medium
Software EngineerIntern

Explain Vector, Linked List, and Polymorphism

In a C++ interview, explain the differences between a dynamic array container such as std::vector and a linked-list-based container such as std::list....

Software Engineering Fundamentals
5
0
56 people solved
Feb 17, 2026
Coursera logo
Coursera
Medium
Software Engineer

Implement plurality and majority voting

You are given an array votes of length n, where each element is a candidate identifier (string or integer). Implement two voting systems: 1) Plurality...

Coding & Algorithms
7
0
63 people solved
Dec 15, 2025
Apple logo
Apple
Medium
Data Scientist

Design an A/B Test for Homepage Layout Impact

Design an A/B Test for Homepage Layout Impact Experiment Design: New Homepage Layout → Purchase Rate Context You are designing an A/B test to evaluate...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
11
0
104 people solved
Aug 4, 2025
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