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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
DoorDash logo
DoorDash
Medium
Software Engineer

Determine equality after limited swaps

Question LeetCode 1790. Check if One String Swap Can Make Strings Equal Follow-up: Given two strings, determine if they can become anagrams of each ot...

Coding & Algorithms
12
0
26 people solved
Jul 29, 2025
Attentive logo
Attentive
Hard
Data Scientist

Explain switch to product analytics and company fit

Behavioral & Leadership Technical Screen (Attentive, Data Scientist) Context You are interviewing for a Data Scientist role where you are expected to ...

Behavioral & Leadership
4
0
40 people solved
Oct 13, 2025
Stripe logo
Stripe
Medium
Data Scientist Locked

Design a hierarchical forecast for transactions

Design an end-to-end daily forecast of gross merchandise volume for every country and industry segment over the next 90 days, with segment forecasts t...

Machine Learning
8
0
55 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Diagnose Causes and Test Hypotheses for Metric Drop

Diagnosing and Testing a Sudden Metric Drop A large consumer web or mobile product sees its key business metric drop materially and suddenly. Assume s...

Analytics & Experimentation
40
0
146 people solved
Jul 12, 2025
Snapchat logo
Snapchat
Hard
Machine Learning Engineer

Design real-time top-K POI retrieval on maps

Real-Time Top-K POIs in Viewport: System Design Context Design a real-time system for a mobile map that continuously shows the top-K points of interes...

ML System Design
10
0
100 people solved
Sep 6, 2025
Wells Fargo logo
Wells Fargo
Medium
Data Scientist

Ensure model ethics and governance

Ensure model ethics and governance Ensuring Model Ethics Across Development and Deployment Context You are interviewing for a Data Scientist role in a...

Behavioral & Leadership
3
0
56 people solved
Jul 26, 2025
Adobe logo
Adobe
Medium
Software Engineer

Describe Your Two-to-Three-Year Growth Direction

Question Where do you want your work to develop over the next two to three years? Explain the capabilities, scope, and kinds of problems you want to g...

Behavioral & Leadership
1
0
12 people solved
Apr 19, 2026
Meta logo
Meta
Medium
Data Engineer

Solve library coding tasks in Python

Solve library coding tasks in Python Implement the following Python tasks: 1) Given a list of (category, points) for books, choose up to 3 books with ...

Coding & AlgorithmsSimulation & State Machines
13
0
95 people solved
Jul 16, 2025
TikTok logo
TikTok
Medium
Software Engineer

Count deletions making array fair

Question LeetCode 1664. Ways to Make a Fair Array – Given an integer array nums, count the indices whose removal results in the sum of elements at eve...

Coding & Algorithms
6
0
38 people solved
Jul 29, 2025
Meta logo
Meta
Medium
Data Scientist

Quality and frequency control for push notifications

Push Notifications: Quality, Overload Mitigation, and Per-user Caps You are a data scientist working on push notifications for a consumer app. Pushes ...

Analytics & Experimentation
56
0
140 people solved
Jul 12, 2025
Databricks logo
Databricks
Medium
Software Engineer Locked

Compute 5-minute rolling average load

This question evaluates understanding of sliding-window aggregation and efficient data-structure design for time-series event streams, focusing on com...

Coding & AlgorithmsData Structure DesignTwo Pointers & Sliding Window
11
0
204 people solved
Feb 3, 2026
DoorDash logo
DoorDash
Hard
Data Scientist

Explain why DoorDash and job change

Behavioral & Leadership (Onsite) — Data Scientist Context You are interviewing for a Data Scientist role focused on marketplace and operations. Use co...

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making
8
0
103 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data ScientistNew Grad

Describe Overcoming a Major Challenge in Your Career

Describe Overcoming a Major Challenge in Your Career This is a behavioral deep-dive for a new-grad data scientist role. The interviewer may ask severa...

Behavioral & Leadership
97
0
256 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Compute French DAU video-call percentage yesterday

Compute the percentage of daily active users (DAU) from France who were on at least one video call yesterday (2025-08-31 UTC). DAU is defined as users...

Data Manipulation (SQL/Python)
1
0
13 people solved
Oct 13, 2025
Instacart logo
Instacart
Easy
Data Scientist

How would you investigate a metric decline?

Scenario You are a Data Scientist supporting a consumer marketplace product. A key business metric (e.g., orders/day, conversion rate, revenue, profit...

Analytics & ExperimentationMetric DiagnosticsSegmentation & Cohort Analysis
21
0
156 people solved
Feb 6, 2026
MathWorks logo
MathWorks
Easy
Software Engineer

Compute probability of drawing reds

Probability of Drawing at Least Two Red Balls Problem A bag contains 6 red balls and 4 blue balls. Three balls are drawn uniformly at random without r...

Statistics & Math
5
0
40 people solved
Sep 6, 2025
Instacart logo
Instacart
Medium
Software Engineer

Parse password from indexed matrix file

Question Given a filepath to a text file containing one index line [x, y] followed by a matrix of characters (origin at lower-left (0, 0)), return the...

Coding & Algorithms
34
0
107 people solved
Jul 29, 2025
Meta logo
Meta
Hard
Data Scientist

Design experiment for fake accounts impact

Experiment Design: Removing Detected Fake Accounts and Measuring Causal Impact Context: You are designing an end-to-end experiment on a large, interac...

Analytics & Experimentation
3
0
59 people solved
Oct 13, 2025
Lyft logo
Lyft
Easy
Software Engineer

Design a Fault-Tolerant Wikipedia Archiver

Question Design a distributed system that archives all Wikipedia pages and keeps the archive current. You have one reliable primary machine, about one...

System Design
2
0
31 people solved
Apr 14, 2026
Reevo logo
Reevo
Medium
Software Engineer

Output lexicographically largest DFS traversal

You are given a graph with n nodes labeled 1..n and m edges. Assume an undirected graph unless stated otherwise. You must output a node visitation seq...

Coding & Algorithms
3
0
31 people solved
Feb 2, 2026
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