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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
LinkedIn logo
LinkedIn
Easy
Data Scientist Locked

Sketch distributions and compare mean/median/mode

This question evaluates understanding of distributional shape, central tendency (mean, median, mode), skewness, outliers, and the effects of combining...

Statistics & MathProbability
14
0
121 people solved
Feb 16, 2026
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Describe background and resume highlights

Behavioral Prompt: Resume Walkthrough, Project Deep Dives, Incident Ownership, Team Fit Context You are interviewing onsite for a Software Engineer ro...

Behavioral & LeadershipProject Deep DiveFailure & Learning
8
0
133 people solved
Sep 6, 2025
Visa logo
Visa
Hard
Software EngineerSenior+ Locked

Solve Two Algorithm Challenges

These two problems evaluate algorithmic skills in array optimization and graph pathfinding: the first focuses on selecting three ordered, non-overlapp...

Coding & Algorithms
3
0
77 people solved
May 4, 2026
Otter.Ai logo
Otter.Ai
Medium
Software Engineer Locked

In-Memory Key-Value Store with Nested Transactions

This question evaluates a candidate's ability to design an in-memory data structure that supports layered, nested transactional state with commit and ...

Coding & Algorithms
7
0
55 people solved
Jun 25, 2026
Adobe logo
Adobe
Medium
Software Engineer

Learn from a Major Work Setback

Question Describe a work experience that left you seriously frustrated or disappointed. What was under your control, how did you respond, and what did...

Behavioral & Leadership
2
0
30 people solved
Apr 19, 2026
Pinterest logo
Pinterest
Easy
Data Scientist Locked

How to evaluate a new Carousel feature

This question evaluates a data scientist's competence in experimentation design, measurement framework formulation, metric definition, and diagnostic ...

Analytics & ExperimentationExperiment Design (A/B Testing)Metric Diagnostics
14
0
171 people solved
Feb 1, 2026
Reddit logo
Reddit
Easy
Data Scientist

Prioritize competing engineering requests

Scenario You are a Data Scientist/Analytics partner supporting multiple engineering teams. Two (or more) teams simultaneously ask you to prioritize th...

Behavioral & Leadership
6
0
109 people solved
Dec 11, 2025
Credit Genie logo
Credit Genie
Hard
Software Engineer

Integrate Chroma and design semantic search API

System Design: Add Semantic Search to an Existing CRUD Service Using Chroma Context You own a document CRUD service (create/read/update/delete) that s...

ML System Design
6
0
104 people solved
Sep 6, 2025
Hudson River Trading logo
Hudson River Trading
Medium
Software EngineerIntern

Compare C++ Virtual Dispatch with CRTP

Explain how C++ virtual functions are commonly implemented and compare runtime polymorphism with the Curiously Recurring Template Pattern. Discuss obj...

Software Engineering Fundamentals
5
0
48 people solved
May 5, 2025
Google logo
Google
Medium
Software EngineerSenior+

Design set with O(1) random access

Design a data structure ("FancySet") that stores unique integers and supports the following operations, each in average O(1) time: - add(x): Insert va...

Coding & AlgorithmsData Structure Design
19
0
225 people solved
Jan 1, 2026
Airbnb logo
Airbnb
Medium
Data Scientist

Compute C/T metrics from bookings and visits

Given two tables, compute control vs treatment (C/T) metrics, apply 24‑hour attribution, and generate a daily plot. Treat “today” as 2025‑09‑01; use t...

Data Manipulation (SQL/Python)SQLData Cleaning & Wrangling
36
0
335 people solved
Oct 13, 2025
Bloomberg logo
Bloomberg
Hard
Software Engineer Locked

Design streaming mention analytics with search and alerts

This question evaluates system-design competencies such as real-time stream ingestion, stateful stream processing and time-windowed aggregation, high-...

System DesignSearch & Feed SystemsBatch & Stream Processing
51
0
450 people solved
Mar 1, 2026
Discord logo
Discord
Medium
Software Engineer

Debug and mitigate a CPU spike incident

Production Debugging: CPU Spike Incident (Open-Ended) You are on-call for a backend service. An alert fires: CPU usage suddenly spikes on the service’...

Software Engineering FundamentalsReliability & SREDebugging
43
0
334 people solved
Oct 25, 2025
Meta logo
Meta
Medium
Software Engineer

Design ticketing system with seat hold

Design an online ticketing system (similar to Ticketmaster) that allows users to browse events, select seats, and place a temporary 5-minute hold on s...

System Design
6
0
84 people solved
Dec 8, 2025
Amazon logo
Amazon
Medium
Business Intelligence Engineer

Find Top Three Books by City in Recent Months

BOOK_SALES +------+--------+------------+------------+ | city | asin | sale_date | units_sold | +------+--------+------------+------------+ | NYC ...

Data Manipulation (SQL/Python)
9
0
81 people solved
Jul 12, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Prevent Duplicate Request Processing

A client accidentally sends the same network request twice, for example because the user double-clicked a button, the client retried after a timeout, ...

System DesignDistributed Transactions & IdempotencyDistributed Coordination
37
0
272 people solved
Apr 4, 2026
Google logo
Google
Medium
Software Engineer

Answer common behavioral questions with follow-ups

Behavioral interview prompt set You are in a standalone Behavioral (BQ) interview. The interviewer asks straightforward, keyword-based questions and t...

Behavioral & LeadershipFailure & LearningConflict & Collaboration
16
0
195 people solved
Dec 15, 2025
DRW logo
DRW
Medium
Data Scientist

Compute rolling standard deviation in O(n)

Compute rolling standard deviation in O(n) Given an array of numbers and a window size k, compute the rolling standard deviation for every contiguous ...

Coding & AlgorithmsProbabilityTwo Pointers & Sliding Window
11
0
134 people solved
Aug 9, 2025
Anthropic logo
Anthropic
Hard
Software Engineer

Explain the Most Complex Situation You Have Handled

What is the most complex situation you have handled professionally? Explain why it was difficult, how you made decisions, and what happened. Constrain...

Behavioral & LeadershipAmbiguity & Decision Making
4
0
33 people solved
Mar 30, 2026
Jane Street logo
Jane Street
Medium
Quantitative Trader

Dice Duel: 30-Sided Die vs. 20-Sided Die with One Blind Reroll

Alice and Bob play a dice game. Alice has a fair 30-sided die (faces $1$ through $30$) and Bob has a fair 20-sided die (faces $1$ through $20$). Each ...

Machine Learning
20
3
153 people solved
Jul 17, 2025
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