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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
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
Qube Research & Technologies logo
Qube Research & Technologies
Medium
Software Engineer

Implement flat_map, redistribute wealth evenly

Implement flat_map, redistribute wealth evenly Implement std::flat_map in C++, including its iterator; explain design choices and add thorough test ca...

Coding & AlgorithmsProgramming LanguagesArrays & Strings
6
0
122 people solved
Aug 4, 2025
Verkada logo
Verkada
Hard
Software Engineer

Implement WordGuess feedback scoring

WordGuess (Wordle-like) scoring Implement a function that scores a guess against a secret word of the same length. Scoring rules (per character) Retur...

Coding & AlgorithmsArrays & Strings
23
0
163 people solved
Oct 13, 2025
Instacart logo
Instacart
Medium
Backend EngineerSenior+ AI

Clarify and Implement Search Filters for a Library Table

Clarify and Implement Search Filters for a Library Table An existing library-management application shows a book table that users find too long and di...

Software Engineering Fundamentals
9
0
81 people solved
May 2, 2026
Uber logo
Uber
Medium
Data Scientist

Compute maximum concurrent trips from intervals

You’re given n trip intervals [start, end) in seconds, where start < end, representing when a rider’s trip starts and ends in a city on a specific day...

Coding & AlgorithmsIntervals & SchedulingSorting
24
0
245 people solved
Oct 13, 2025
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Design Real-Time Collaborative Editing

This question evaluates competence in distributed systems, real-time synchronization, concurrency control, data modeling, and automated conflict-resol...

System DesignReal-Time Systems
14
0
230 people solved
Mar 11, 2026
Bloomberg logo
BloombergMicrosoftAmazon
Easy
Software Engineer

Smallest Absent Positive Multiple

Problem You are given an integer array nums and a positive integer k. Return the smallest positive integer divisible by k that does not appear in nums...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
6 people solved
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Find the Minimum Parenthesis Deletions and Their Positions

Return the source indices for a minimum set of parenthesis deletions that leaves a valid sequence, choosing the lexicographically smallest index list ...

Coding & Algorithms
5
0
38 people solved
May 26, 2026
NVIDIA logo
NVIDIA
Easy
Software Engineer

Design real-time fraud detection under 50ms

Design a real-time fraud detection system for a payments company that processes millions of transactions per day. Requirements: - For each incoming tr...

ML System DesignPayments & LedgersMLOps & Model Serving
18
0
128 people solved
Jan 15, 2026
The New York Times logo
The New York Times
Medium
Product Manager

Facilitating a Productive Brainstorm and Showing It Succeeded

In a product manager interview, you are asked to describe a brainstorming session that you ran and that went well, and to explain why you consider it ...

Behavioral & LeadershipLeadership & Influence
0
0
12 people solved
Apr 6, 2026
DoorDash logo
DoorDash
Medium
Data Scientist Locked

Evaluate a Bike Dasher Program with a Controlled Experiment

Evaluate a bicycle courier program with a decision-focused marketplace experiment. The case covers pickup dwell-time measurement, success and guardrai...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
12
0
191 people solved
Jul 18, 2026
Oracle logo
Oracle
Medium
Data ScientistIntern Locked

Explain Medical AI Data and Evaluation

This question evaluates competence in medical conversational AI covering data sourcing and cleaning, leakage-aware dataset splitting, model choice (pr...

Machine Learning
4
0
72 people solved
Jan 20, 2026
Hive.Ai logo
Hive.Ai
Easy
Software EngineerSenior+ Locked

Design a Synchronous Text Classification API

Design a synchronous text-classification API with a small stateless online path and versioned model artifacts. Cover authentication, validation, load ...

ML System Design
2
0
21 people solved
May 17, 2026
Uber logo
Uber
Medium
Data Scientist

How to evaluate lowering ETA?

Uber wants to estimate the business value of reducing ETA, where ETA is the predicted time from when a rider requests a trip until the driver arrives ...

Analytics & ExperimentationMetrics & KPIsCausal Inference
22
0
148 people solved
Feb 1, 2026
Apple logo
AppleMetaBloomberg
Medium
Software Engineer

Sum the Bit Differences across All Array Pairs

Sum the Bit Differences across All Array Pairs The Hamming distance between two nonnegative integers is the number of bit positions at which their bin...

Coding & AlgorithmsBit ManipulationMath & Number Theory
0
0
7 people solved
ByteDance logo
ByteDance
Medium
Data Scientist

Compare SQL counts, windows, and NULL semantics

You’re given two tables. users(id INT, country STRING, created_at DATE) rows: 1 | US | 2025-08-28 2 | US | 2025-08-30 3 | IN | 2025-08-29 4 | BR | 202...

Data Manipulation (SQL/Python)SQL
12
0
111 people solved
Oct 13, 2025
Amazon logo
AmazonGoogleMetaMicrosoft

Also asked at Meta, Microsoft

Easy
Software Engineer

Count Index Pairs with a Sum Below the Target

Count Index Pairs with a Sum Below the Target You are given a 0-indexed integer array nums of length n and an integer target. Return the number of ind...

Coding & AlgorithmsArrays & Strings
0
0
8 people solved
Mistral AI logo
Mistral AI
Medium
Product Manager

Explain a Difficult Product Call and the Evidence You Used to Justify It

Walk me through a difficult product decision you owned. Why was it hard, what evidence and reasoning did you use to support it, and what happened as a...

Behavioral & LeadershipAmbiguity & Decision Making
0
0
9 people solved
Jun 9, 2026
Amazon logo
AmazonGoogleBloomberg
Easy
Software Engineer

Find Low-Paid Employees Whose Recorded Manager Row Is Gone

Problem Return employee_id for employees paid strictly less than 30000 whose non-NULL manager_id no longer identifies any Employees row. A NULL manage...

Data Manipulation (SQL/Python)SQL
0
0
7 people solved
Google logo
GoogleMicrosoftMeesho
Medium
Software Engineer

Count Distinct XOR Values from Index Triples

Problem You are given an array nums of length n that is a permutation of the integers 1 through n. For every index triple satisfying 0 <= i <= j <= k ...

Coding & AlgorithmsBit ManipulationMath & Number Theory
0
0
9 people solved
ByteDance logo
ByteDance
Easy
Software Engineer Locked

Debug and Extend a Priority-Aware Python Thread Pool

Debug and extend a Python thread pool with stable priority scheduling under concurrent submissions. Define safe behavior for worker failures, exceptio...

Software Engineering Fundamentals
5
0
49 people solved
Jul 11, 2026
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