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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
Chicago Trading Company logo
Chicago Trading Company
Easy
Data Scientist Locked

Determine if tree has path sum

This question evaluates understanding of binary tree data structures and traversal techniques, along with the ability to accumulate and track root-to-...

Coding & Algorithms
4
0
34 people solved
Feb 9, 2026
Amazon logo
Amazon
Hard
Software Engineer

Design document-tag classes with concurrency safety

Design document-tag classes with concurrency safety System Design: In‑Memory Document–Tag Manager (Single Node) Context You are designing an in-memory...

System Design
8
0
65 people solved
Jul 31, 2025
Optiver logo
Optiver
Medium
Quantitative Trader

Compare two programs for equivalence

You are given two short programs (or functions) that process an integer array A (|A| ≤ 10^ 5). Determine whether they are functionally equivalent for ...

Coding & AlgorithmsTesting & QualityProgramming Languages
11
0
126 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist

Resolve cross-team conflict and align incentives

Behavioral & Leadership: Cross-Team Conflict With Tight Timeline You are a Data Scientist interviewing for an onsite role. Describe a realistic cross-...

Behavioral & Leadership
4
0
54 people solved
Oct 13, 2025
Wells Fargo logo
Wells Fargo
Medium
Data Scientist

Design Excel visuals for risk results

Design Excel visuals for risk results Excel Dashboard Design: Communicating EL, RWA, and Concentration Risk Context You are preparing an Excel dashboa...

Analytics & Experimentation
4
0
55 people solved
Jul 26, 2025
Circle logo
Circle
Medium
Software Engineer

Design payment scheduler with cancel and top-K outgoing

Design and implement an in-memory banking payment component with the following APIs: ( 1) schedulePayment(payerId, payeeId, amount, executeAt) -> paym...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
19
0
154 people solved
Aug 1, 2025
Meta logo
Meta
Medium
Software Engineer

Reverse between equal-value nodes in list

Given the head of a singly linked list and a target value v, locate the first two nodes whose values equal v (call them A and B, with A before B) and ...

Coding & Algorithms
5
0
53 people solved
Sep 6, 2025
Hard
Software Engineer

Implement a multi-button click detector

Implement a click detector for multiple physical buttons. You receive button state updates as a stream. Each update provides: - button_id (integer) - ...

Coding & Algorithms
7
0
62 people solved
Feb 3, 2026
Apple logo
Apple
Hard
Machine Learning Engineer

Design an ML keyword recommendation pipeline

Design an ML keyword recommendation pipeline ML System Design: Typed Search Keyword Recommendations for an App Marketplace Goal Design an end-to-end M...

ML System DesignSearch RelevanceML Data Pipelines & Feature Stores
12
0
163 people solved
Jul 26, 2025
Google logo
Google
Hard
Data Scientist

Diagnose and reverse an adoption-rate decline

Problem: Investigating a 7pp Drop in Google Meet Enterprise Adoption Rate Context Over the last 4 calendar weeks, enterprise adoption rate has fallen ...

Analytics & ExperimentationMetric DiagnosticsCausal Inference
6
0
104 people solved
Oct 13, 2025
Tesla logo
Tesla
Medium
Backend EngineerSenior+

Design booking and settlement systems

You may be asked one or more backend-heavy system design problems such as: 1. Design a reserved-seat ticketing platform similar to a concert or sports...

System DesignPayments & LedgersData Quality & Validation
14
0
104 people solved
Jan 25, 2026
Snapchat logo
Snapchat
Medium
Data Scientist Locked

Analyze OLS After Duplicating Every Observation

Derive how exact row duplication affects OLS coefficients and standard errors. The coefficients stay fixed while naive uncertainty shrinks, exposing a...

Statistics & Math
2
0
19 people solved
Aug 13, 2026
Meta logo
Meta
Medium
Data Scientist

Compute Daily Revenue by Creation Source

active_ads date | ad_id | advertiser_id | creation_source | revenue 2023-09-01 | 1001 | 17 | mobile_app | 150.00 2023-09-01 | 1...

Data Manipulation (SQL/Python)
69
0
250 people solved
Jul 12, 2025
Uber logo
Uber
Medium
Software Engineer

Simulate robot on grid with obstacles

Simulate robot on grid with obstacles A robot starts at (0, 0) on an unbounded integer grid. You are given a sequence of commands consisting of charac...

Coding & AlgorithmsSimulation & State Machines
9
0
106 people solved
Jul 15, 2025
Oracle logo
Oracle
Medium
Software Engineer

Design a ride-sharing system (Uber)

Design a large-scale ride-sharing platform similar to Uber. Cover: - Rider and driver apps (account, availability, requesting rides). - Real-time driv...

System DesignGeo & Delivery SystemsReal-Time Systems
14
0
103 people solved
Jan 26, 2026
Uber logo
Uber
Hard
Data Scientist

Explain and validate A/B test assumptions

A/B Test Validity: Core Assumptions, Violations, Diagnostics, and Mitigations You are designing and evaluating an online A/B test for a large, multi-s...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing
14
0
161 people solved
Oct 13, 2025
Nike logo
Nike
Medium
Software Engineer Locked

Design a PDF Ingestion and Retrieval-Augmented Generation Pipeline

Design PDF ingestion and retrieval-augmented generation with page-level citations across selectable text, scans, tables, repeated headers, malformed f...

ML System Design
0
0
9 people solved
Aug 4, 2026
Google logo
Google
Medium
Data Scientist Locked

Implement sampling and subarray algorithms

Solve uniform 2D square sampling and longest increasing contiguous subarray. The solution maps Uniform(0,1) to Uniform(-1,1), proves uniformity by ind...

Coding & AlgorithmsProbabilityArrays & Strings
11
0
114 people solved
Mar 9, 2025
Trexquant logo
Trexquant
Medium
Software Engineer

Maintain median of a data stream

Design a data structure that supports: - addNum(int x): Add an integer from a stream. - findMedian(): Return the median of all inserted numbers so far...

Coding & Algorithms
13
0
104 people solved
Sep 1, 2025
Medium
Software Engineer

Explain RF/analog IC interview fundamentals

Explain RF/analog IC interview fundamentals You are interviewing for an RF/analog IC design role. Answer the following conceptual questions (no code r...

Software Engineering Fundamentals
13
0
178 people solved
Aug 5, 2025
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