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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
Amazon logo
Amazon
Hard
Software Engineer Locked

Design a Core Dump Collection and Analysis System

Prepare for a Amazon system design interview about design a core dump collection and analysis system. This question focuses on requirements, architect...

System Design
4
0
63 people solved
Jun 4, 2026
Discord logo
Discord
Hard
Data Engineer

Design Video Call Analytics Tables

You are building analytics tables for Discord video calls. Video-call activity is recorded from both client-side and server-side logs. Design a data m...

System DesignDimensional ModelingSQL
33
0
229 people solved
Apr 3, 2026
Applied Intuition logo
Applied Intuition
Medium
Machine Learning Engineer

Debug a GPT training pipeline

Fix three bugs in a minimal GPT to meet a training-loss target You are given a Colab notebook with a minimal GPT-style language model implemented in P...

ML System DesignML CodingDebugging
22
0
179 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist

Count unconnected posts and reactions

You are analyzing a newly launched feed feature intended to improve engagement by showing more unconnected content. Assume the following tables: - pos...

Data Manipulation (SQL/Python)SQL
25
2
235 people solved
Apr 5, 2026
Affirm logo
Affirm
Medium
Software Engineer

Describe your highest-impact project

Tell me about the project where you created the biggest impact. In your answer, cover: - the business or user problem you were solving - why the probl...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
8
0
109 people solved
Mar 7, 2026
Atlassian logo
Atlassian
Hard
Machine Learning Engineer Locked

Design an ML-powered search system

This question evaluates a candidate's ability to design end-to-end ML-powered search systems, testing competencies in information retrieval, ranking, ...

ML System DesignSearch RelevanceRanking Models
19
0
125 people solved
Mar 1, 2026
Google logo
Google
Medium
Data Scientist Locked

Infer distribution and choose robust statistics

Infer what distribution generated 10,000 session revenues from summary statistics alone, then choose a transformation, a median interval, an A/B test,...

Statistics & MathProbabilityHypothesis Testing
11
0
120 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Easy
Software Engineer

Compare arrays, linked lists, hash tables, trees

Answer the following computer-science fundamentals questions: 1) What are the time complexities (Big-O) of common sorting algorithms (e.g., bubble sor...

Software Engineering FundamentalsSorting
16
0
206 people solved
Feb 6, 2026
Tesla logo
Tesla
Medium
Data Engineer Locked

Write SQL Data Transformation Queries

This question evaluates proficiency in SQL data transformation and aggregation, testing competencies such as monthly-reset running totals, hierarchica...

Coding & Algorithms
11
0
84 people solved
May 4, 2026
DoorDash logo
DoorDash
Medium
Data Scientist Locked

Evaluate Courier-Selected Delivery Distance Limits

Evaluate a feature that lets couriers choose maximum delivery distances. Analyze historical offer behavior, account for marketplace interference, choo...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
4
0
89 people solved
Jul 19, 2026
Tower logo
Tower
Hard
Data Scientist Locked

Predict Five-Minute Returns from Order-Book Data

You have time-stamped order-book observations containing buy and sell information, instrument, price, and quantity. Cover data and labels, leakage-saf...

Machine Learning
2
0
30 people solved
Jul 26, 2026
Bitkernel logo
Bitkernel
Medium
Software Engineer

Order SQL query logical processing steps

Consider a SQL query written in SQL-92 style: `sql SELECT foo, COUNT(foo) FROM pokes WHERE foo > 10 GROUP BY foo HAVING COUNT(foo) > 1 ORDER BY foo; `...

Software Engineering Fundamentals
5
0
79 people solved
Oct 24, 2025
Amazon logo
Amazon
Medium
Data Scientist

Solve Algorithmic Challenges in Online Coding Assessments

Scenario Online assessment requiring implementation of common algorithmic problems. Question Given an array of integers and a target, return indices o...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
16
0
143 people solved
Aug 4, 2025
B
BlackEdge
Easy
Data Scientist

Solve quantitative word and algebra problems

Quantitative Mini-Problems (Independent) Solve each problem independently. Show your setup clearly. Use standard unit conversions and give exact value...

Statistics & Math
10
0
99 people solved
Sep 6, 2025
Optiver logo
Optiver
Medium
Software Engineer

Detect currency arbitrage with costs

You are given a K×K matrix R of currency exchange rates where R[i][j] is the amount of currency j obtainable for one unit of currency i, and R[i][i] =...

Coding & AlgorithmsGraphs
48
0
350 people solved
Jul 16, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Implement bank balance operations

Question Design and implement a Bank account class that supports the operations Deposit(amount), Withdraw(amount), and CashBack(percent). Ensure balan...

Coding & Algorithms
8
0
100 people solved
Aug 4, 2025
Google logo
Google
Medium
Data Scientist

Test a coefficient and explain t-distribution

In OLS, test whether feature j is relevant. a) State H0: β_j = 0 versus H1: β_j ≠ 0 and construct the t‑statistic t_j = b̂_j / se(b̂_j), giving the ex...

Statistics & MathHypothesis TestingProbability
7
0
130 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Hard
Software Engineer

Design signals across power and clock domains

Question In a SoC with two power domains A and B, design the interface for a control signal signal_1 (a registered 1-bit control such as an enable/sta...

System Design
28
0
208 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Solve multi-part SQL with sliding windows

Assume 'today' is 2025-09-01. You are given the following tables. users(user_id INT PRIMARY KEY, signup_date DATE) orders(order_id INT PRIMARY KEY, us...

Data Manipulation (SQL/Python)
7
0
60 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Hard
Software Engineer

Design distributed parallel job processing

Design a Distributed System for Parallel Job Execution Context You are asked to design a highly available, horizontally scalable service that executes...

System DesignJob Scheduling & WorkflowsFault Tolerance & Failover
12
0
122 people solved
Sep 6, 2025
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