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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Airbnb logo
Airbnb
Hard
Data Scientist Locked

Design and assess an A/B test

This question evaluates a data scientist's competency in experimental design, statistical power and sample-size estimation, metric definition and guar...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
12
0
154 people solved
Sep 6, 2025
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Transform messy transactions with pandas

You are given two CSVs. transactions.csv - Columns: txn_id, user_id, ts_iso (ISO8601 with timezone), amount (decimal USD; refunds negative), merchant_...

Data Manipulation (SQL/Python)
2
0
33 people solved
Oct 13, 2025
Google logo
Google
Hard
Software Engineer Locked

Compute minimax grid path and network delay

This question evaluates algorithmic problem-solving in shortest-path and path-optimization contexts, specifically minimax pathfinding on a grid and si...

Coding & AlgorithmsGraphsBinary Search
23
0
278 people solved
Jan 22, 2026
Amazon logo
Amazon
Medium
Software Engineer

Implement a Single-Node Priority Pub/Sub

Implement a simplified in-memory publish-subscribe system that runs on a single machine. The system should support users subscribing to topics with a ...

Software Engineering FundamentalsMessaging & Event-DrivenConcurrency
4
0
86 people solved
Apr 9, 2026
Meta logo
Meta
Medium
Data Engineer

Validate carpool capacity

Question LeetCode 1094. Car Pooling – Given trips[i] = [numPassengers, start, end] and an integer capacity, return true if the vehicle can fulfill all...

Coding & AlgorithmsIntervals & Scheduling
8
0
114 people solved
Aug 4, 2025
Roblox logo
Roblox
Hard
Data Scientist

Design experiment for homepage tab replacement

Experiment Design: Replacing a Homepage Tab and Measuring User + Ecosystem Impact Assume today is 2025-09-01. Roblox plans to replace an existing home...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
6
0
108 people solved
Oct 13, 2025
ByteDance logo
ByteDance
Medium
Software Engineer

Largest path sum in a binary tree with negative node values

A binary tree stores an integer, possibly negative, in each node. A path is a sequence of one or more distinct nodes in which every two consecutive no...

Coding & AlgorithmsTrees
0
0
3 people solved
Jul 28, 2026
Roblox logo
Roblox
Medium
Data Scientist

Compute CTR, RPM, and daily RPM variability in SQL

Write ANSI-Postgres SQL to compute, for each campaign, over the last 7 days inclusive (assume "today" is 2025-09-01, so the window is 2025-08-26 throu...

Data Manipulation (SQL/Python)
2
0
36 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Design and implement an LRU cache

This question evaluates knowledge of data structures, algorithmic design, API design, and memory/resource management required to implement an efficien...

Coding & AlgorithmsData Structure DesignLinked Lists
11
0
144 people solved
Feb 8, 2026
Patreon logo
Patreon
Medium
Software Engineer Locked

Analyze Reports in a Nested Org Chart

Analyze a nested organization chart and classify every employee as an individual contributor or manager. Compute direct and total descendant counts in...

Coding & Algorithms
4
0
39 people solved
May 27, 2026
Netflix logo
Netflix
Medium
Data Scientist

Implement longest increasing subarray with one deletion

Given an array of integers nums, return the length of the longest strictly increasing contiguous subarray you can obtain by deleting at most one eleme...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
25
0
173 people solved
Oct 13, 2025
Gusto logo
Gusto
Medium
Data Scientist Locked

Compute Parking Clustering Probability and P-Value

This question evaluates combinatorial probability and hypothesis-testing skills, specifically counting-based calculation of exact probabilities under ...

Statistics & Math
5
0
78 people solved
May 27, 2026
IBM logo
IBM
Medium
Software Engineer

Implement valid 1-D convolution with bias

Question Implement a "valid" 1-D convolution function in the cross-correlation sense. Given an input array of numbers, a kernel (filter) array of numb...

Coding & Algorithms
6
0
83 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Software Engineer

Design input validation and error handling

Question You own a service endpoint that computes the top-k most frequent elements in a posted array. The counting algorithm is not the interview — th...

System Design
8
0
87 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Forecast and Analyze DoorDash Menu Price Inflation Gap

Forecast and Analyze DoorDash Menu Price Inflation Gap DoorDash wants to understand and forecast the difference between on-platform menu prices and th...

Statistics & MathTime Series & ForecastingSampling & Estimation
12
0
125 people solved
Aug 4, 2025
Capital One logo
Capital One
Medium
Data Scientist

Compute and interpret 95% confidence intervals

Answer all parts. Show formulas and intermediate values. A) An A/B test measures conversion: Variant A has 410 conversions out of 5000 visitors; Varia...

Statistics & MathHypothesis TestingSampling & Estimation
10
0
125 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Implement and compare round-robin and consistent hashing

Implement a round-robin load balancer that selects among service nodes, skipping unavailable nodes and wrapping around correctly. Fix typical pitfalls...

Coding & AlgorithmsData Structure DesignPartitioning & Consistent Hashing
13
0
210 people solved
Sep 6, 2025
Palo Alto Networks logo
Palo Alto Networks
Hard
Software Engineer

Design an ML inference orchestration platform

System Design: ML Inference Orchestration Platform Context You are designing a multi-tenant platform that exposes several ML models as independent ser...

ML System Design
14
0
122 people solved
Sep 6, 2025
Anthropic logo
Anthropic
Hard
Machine Learning Engineer

Design a scalable MapReduce pipeline

Design a scalable MapReduce pipeline Design a Large-Scale MapReduce-Style Data Processing System Context You are designing a batch pipeline, using a M...

System DesignBatch & Stream ProcessingFault Tolerance & Failover
38
0
294 people solved
Aug 1, 2025
Citi logo
Citi
Medium
Software Engineer

Implement bidirectional Dijkstra for shortest paths

Given a directed or undirected graph with non‑negative edge weights, design and implement bidirectional Dijkstra (“double Dijkstra”) to find the short...

Coding & AlgorithmsGraphsHeaps & Priority Queues
5
0
113 people solved
Sep 6, 2025
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