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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Meta logo
Meta
Medium
Data Scientist

Find the most-used app

You work on Oculus app engagement analytics. Tables user_activity - user_id (BIGINT) - date (DATE) — day of activity (assume UTC unless otherwise spec...

Data Manipulation (SQL/Python)Metrics & KPIsSQL
6
0
47 people solved
Aug 17, 2025
eBay logo
eBay
Medium
Software Engineer

Count Connected Land Regions

You are given an m x n 2D grid representing a map. Each cell is either land ('1') or water ('0'). A land region is formed by connecting adjacent land ...

Coding & Algorithms
4
0
30 people solved
Jan 27, 2026
Capital One logo
Capital One
Medium
Data Scientist

Model network-service unit economics and breakeven

A network service charges $40/month with the first 3 months free. Costs: variable service cost $25 per active month; one-time install cost $35 at acti...

Statistics & Math
5
0
86 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Write one SQL for exam scores aggregation

You are given an exam database. Write a single SQL statement (CTEs allowed; one final statement only) that satisfies all three requirements below. You...

Data Manipulation (SQL/Python)
5
0
45 people solved
Oct 13, 2025
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Data Scientist

Compute ruin probability with bold betting

Probability of Reaching 5 Tokens Before Ruin Setup - You start with 3 tokens, target is 5 tokens, and ruin is 0. - On each turn, you bet as many token...

Statistics & MathProbabilityPuzzles & Brainteasers
14
0
154 people solved
Aug 11, 2025
Snapchat logo
Snapchat
Medium
Data Scientist

Monitor Friend-Request System for Quality and Abuse

Friendship +--------------+-------------+---------------------+---------------------+ | requester_id | approver_id | request_ts | approval_ts...

Data Manipulation (SQL/Python)
112
1
375 people solved
Jul 12, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Can You Place N Objects?

This question evaluates array traversal, adjacency-constraint reasoning, and greedy placement intuition, emphasizing handling of boundary conditions a...

Coding & AlgorithmsGreedyArrays & Strings
13
0
111 people solved
Mar 22, 2026
PayPal logo
PayPal
Easy
Data Scientist

Answer career, manager, and team fit questions

Behavioral Questions Answer the following questions in a structured, interview-ready way: 1. Project deep dive: Walk me through a project you worked o...

Behavioral & Leadership
6
0
60 people solved
Dec 16, 2025
Two Sigma logo
Two Sigma
Medium
Data Scientist Locked

Return sorted values after quadratic transform

This question evaluates understanding of mathematical transformations and array manipulation, specifically how applying a quadratic function affects t...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
7
0
92 people solved
Jan 22, 2026
Upstart logo
Upstart
Medium
Software Engineer

Describe Your Python Experience

Describe Your Python Experience Describe your practical Python experience, including the kinds of systems or analyses you built, quality practices, an...

Software Engineering Fundamentals
2
0
16 people solved
Jan 15, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Debug distributed-system performance problems

You are asked: “If a distributed system has a performance problem (latency/throughput regression), how would you approach it?” Describe a practical, s...

Software Engineering FundamentalsDebuggingObservability
7
0
91 people solved
Dec 17, 2025
TikTok logo
TikTok
Hard
Machine Learning Engineer

Walk through resume under pressure and critique

Question Walk me through four significant projects on your resume. For each project, cover: 1. Problem, context, and constraints — the user/business p...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
13
0
116 people solved
Sep 6, 2025
Google logo
Google
Medium
Data Scientist

Build Model to Predict Customer Contract Renewal

Build a Model to Predict Customer Contract Renewal You are designing a model to predict whether an enterprise customer will renew a Google Meet contra...

Machine LearningSupervised LearningFeature Engineering
120
0
336 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Maximize Value Under a Budget

This question evaluates combinatorial optimization and algorithm design skills for resource-constrained selection problems, focusing on concepts exemp...

Coding & Algorithms
3
0
27 people solved
May 22, 2026
Amazon logo
Amazon
Medium
Software Engineer

Solve frequency sort and all-pairs sum

Solve frequency sort and all-pairs sum Task 1 — Frequency-based string reorder: Given a string s containing ASCII characters, return a new string whos...

Coding & Algorithms
7
1
65 people solved
Jul 27, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Describe handling ambiguity and resolving design conflicts

Answer the following behavioral prompts with concrete examples (you can assume a software engineering role): Prompt A — Delivering with little guidanc...

Behavioral & LeadershipAmbiguity & Decision MakingConflict & Collaboration
15
0
112 people solved
Feb 12, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Compute Differences Between Catalog Trees

You are given two rooted catalog trees. Each node has a unique string key among its siblings and an associated value. Compare the two trees and return...

Coding & AlgorithmsTrees
18
0
147 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Hard
Data Scientist

Design a model for imbalanced conversions

Predicting Purchase Propensity After a Campaign (5% Positives) You previously ran a marketing campaign to 10,000 customers and observed 500 purchases ...

Machine Learning
12
0
85 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Determine Superiority of Model A Using Hypothesis Testing

Hypothesis Test: Is Model A Better Than Model B? A search feature marks a session as successful only when both relevancy and accuracy binary flags equ...

Statistics & Math
28
0
130 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Software Engineer

Find returning users from access logs

Given a large user access log, parse it and identify which user_ids are returning customers—i.e., they have at least one visit on two or more distinct...

Data Manipulation (SQL/Python)
3
0
31 people solved
Sep 6, 2025
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