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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
Pinterest logo
Pinterest
Medium
Data Scientist

Find top category by video time spent

Pandas required. You are given a DataFrame df with columns: user_id (int), pin_id (int), pin_type (str), category (str or None), time_spent_sec (numer...

Data Manipulation (SQL/Python)Pandas & Python DataData Cleaning & Wrangling
25
1
185 people solved
Oct 13, 2025
Waymo logo
Waymo
Medium
Data Scientist

Assess Routing Experiment Validity

A ride-hailing team runs an A/B test in San Francisco in July 2024 for a new routing algorithm intended to reduce time to pickup, abbreviated TTP. You...

Statistics & MathExperiment Analysis & ReadoutHypothesis Testing
50
3
408 people solved
Mar 7, 2026
Baseten logo
Baseten
Medium
Software Engineer Locked

Parallelize chunked file download and verify integrity

This question evaluates understanding of parallelized I/O, concurrency control, failure and retry handling, and data-integrity verification for chunke...

Coding & AlgorithmsConcurrencyAPI Integration & HTTP Clients
17
0
166 people solved
Feb 12, 2026
TikTok logo
TikTok
Medium
Data Scientist

SQL Queries and Analysis on Bad Advertisers

Scenario You are on the analytics team at TikTok and need to analyze the presence of bad content in ads and identify problematic advertisers. Question...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
14
0
105 people solved
Jun 29, 2025
Anthropic logo
Anthropic
Medium
Software EngineerSenior+

Answer AI Safety Behavioral Prompts

You are preparing for the final "culture" / hiring-manager rounds of a Software Engineer interview at an AI-focused company (the context here is Anthr...

Behavioral & LeadershipEthics & ResponsibilityMotivation & Fit
50
0
357 people solved
Mar 2, 2026
Reddit logo
Reddit
Hard
Data Scientist

Communicate and de-risk a non-experimental launch

Decision-to-Launch Plan After a Synthetic Control Result Context You are a data scientist who used a Synthetic Control method to estimate the causal i...

Behavioral & LeadershipCausal InferenceCI/CD & Deployment
8
0
125 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Find Top-3 Salaries Per Department Using SQL

employees +----+---------+--------+---------+ | id | name | salary | dept_id | +----+---------+--------+---------+ | 1 | Alice | 120000 | 10 ...

Data Manipulation (SQL/Python)
5
0
39 people solved
Aug 4, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Design a 911 emergency calling service

System Design Prompt Design a 911 emergency calling service (or emergency call routing platform) that allows users to place emergency calls from mobil...

System DesignSystem Design FundamentalsFault Tolerance & Failover
17
0
268 people solved
Oct 18, 2025
Two Sigma logo
Two Sigma
Medium
Software Engineer

All Subsequences After Deleting One Character

You are given a string s of length n consisting of lowercase English letters. Consider every string that can be obtained by deleting exactly one chara...

Coding & Algorithms
5
0
75 people solved
Sep 19, 2025
6Sense logo
6Sense
Medium
Software Engineer Locked

Count Squares from Points in the Plane

Implement count_squares(points). Work through the function contract, boundary cases, correctness argument, and time and space complexity expected in a...

Coding & Algorithms
1
0
13 people solved
Jul 27, 2026
Cohere logo
Cohere
Medium
Machine Learning EngineerSenior+ Locked

Explain LLM training, RL, and evaluation

This question evaluates understanding of the full large language model lifecycle and associated competencies, including pre-training, supervised fine-...

Machine LearningFine-Tuning & Alignment TechniquesReinforcement Learning
8
0
128 people solved
Dec 25, 2025
Robinhood logo
Robinhood
Medium
Data Scientist

Create OHLC Aggregates from Tick Data in Python

price_stream +-----------+-------+ | timestamp | price | +-----------+-------+ | 0 | 3 | | 1 | 2 | | 2 | 4 | | 3 ...

Data Manipulation (SQL/Python)
6
0
46 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Software EngineerIntern

Control Robot Charging with Repeated Polling and Exclusive Station Assignments

A fleet contains multiple robots and a limited number of charging stations. A robot whose battery level is below 50% should be sent to an available ch...

Software Engineering FundamentalsSimulation & State MachinesAPI Integration & HTTP Clients
1
0
19 people solved
Jan 10, 2026
Coinbase logo
Coinbase
Hard
Machine Learning Engineer Locked

Explain precision/recall and compute NN output

This question evaluates understanding of classification evaluation metrics (precision, recall, F1), ensemble learning principles (bagging vs boosting,...

Machine LearningModel EvaluationML Fundamentals
15
0
161 people solved
Feb 1, 2026
Voleon logo
Voleon
Medium
Data Scientist

Fit Linear Regression: Analyze Economic Impact of Coefficients

Fit Linear Regression: Analyze Economic Impact of Coefficients Scenario You are given a tabular financial dataset df where the column target is the de...

Machine LearningRegression & Statistical ModelingHypothesis Testing
23
0
267 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Software EngineerNew Grad Locked

Organize a Product Initiative Across Stakeholders

Practice explaining how you brought structure to a multi-stakeholder initiative, from clarifying goals and priorities to assigning ownership and track...

Behavioral & LeadershipLeadership & InfluenceCommunication & Stakeholders
14
0
171 people solved
Jul 15, 2026
Netflix logo
Netflix
Medium
Software Engineer Locked

Design playlist with add/remove/shuffle

This question evaluates data structure design and algorithmic complexity skills, focusing on managing dynamic sets, uniform random selection, and aver...

Coding & AlgorithmsData Structure Design
37
0
263 people solved
Jan 22, 2026
Optiver logo
Optiver
Hard
Data Scientist Locked

Find missing numbers in sequences

This question evaluates sequence pattern recognition, numerical reasoning with integers and rational numbers, and the ability to infer recurrences or ...

Coding & AlgorithmsPuzzles & Brainteasers
16
0
311 people solved
Feb 3, 2026
Pinterest logo
Pinterest
Hard
Machine Learning Engineer

Design an ads system to improve CTR

Design an ML system to increase the click-through rate (CTR) of ads shown in the personalized feed of an online social media platform. You run the ran...

ML System DesignCTR Prediction & Ads MLML Data Pipelines & Feature Stores
21
0
187 people solved
Dec 13, 2025
Datadog logo
Datadog
Hard
Software Engineer

Design an image detection system

System Design: End-to-End Image Object-Detection Service Context Design a production-grade service that ingests user-uploaded images, runs object dete...

ML System DesignSystem Design FundamentalsComputer Vision
44
0
302 people solved
Sep 6, 2025
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