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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Waymo logo
Waymo
Medium
Software EngineerSenior+ Locked

Design an Online Experiment

This question evaluates experimental design and causal inference skills for production ML systems, including metric definition, randomization and trea...

Machine LearningExperiment Design (A/B Testing)Metrics & KPIs
12
0
105 people solved
Feb 6, 2026
TikTok logo
TikTok
Medium
Data Scientist

Compute 7-day rolling complaint/order ratio in SQL

SQL only. Given the schema and sample data below, write a single Postgres query (no procedural code) to compute a 7-day rolling complaint-to-order rat...

Data Manipulation (SQL/Python)
3
0
24 people solved
Oct 13, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Solve Number of Islands

Question LeetCode 200. Number of Islands – Given a 2D grid of '1's (land) and '0's (water), count the number of islands. Follow-up: implement the solu...

Coding & AlgorithmsGrids & MatricesGraphs
9
0
102 people solved
Aug 4, 2025
Snowflake logo
Snowflake
Hard
Data Scientist

Decide and justify product metrics amid trade-offs

Smart Sort Feed Ranking: Metrics, Experiment, Decisions, and Monitoring Context: You are introducing a new Smart Sort ranking for a content feed. It s...

Analytics & Experimentation
7
0
58 people solved
Oct 13, 2025
Amazon logo
Amazon
Hard
Product Manager

Kindle Launch: Date vs. Scope Trade-Off

Kindle Launch Decision: Date Versus Scope Trade-Off You manage a new Kindle with eight planned features: five software features and three hardware fea...

Product / Decision Making
10
0
79 people solved
Jul 4, 2025
Meta logo
Meta
Medium
Data Scientist

Write SQL for CTR and revenue

Write SQL for the following two tasks. Problem 1: CTR during peak vs. non-peak hours You are given three tables: - ads(ad_id BIGINT, advertiser_id BIG...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
10
1
66 people solved
Jan 3, 2026
Meta logo
Meta
Medium
Data Scientist

Calculate Total Revenue in USD Using SQL Query

ads_revenue +---------+------------+---------+----------+ | ad_id | country | revenue | currency | +---------+------------+---------+----------+ ...

Data Manipulation (SQL/Python)SQL
101
1
209 people solved
Aug 4, 2025
Klaviyo logo
Klaviyo
Hard
Software Engineer

Design banking with scheduled transfers and merges

Design banking with scheduled transfers and merges In-Memory Banking System with Scheduled Payments and Account Merges Design and implement a single-t...

System DesignData Structure DesignSimulation & State Machines
19
0
139 people solved
Jul 15, 2025
Meta logo
Meta
Medium
Data Scientist

Design Experiment to Test New Hashtag Recommender Algorithm

Experiment Design: Testing a New Hashtag Recommender A social app shows hashtag recommendations to users while they compose posts. A new algorithm is ...

Analytics & Experimentation
15
0
49 people solved
Jul 12, 2025
Amazon logo
Amazon
Hard
Software EngineerIntern

Return all valid word-break sentences

Given a string s and a dictionary of strings wordDict, insert spaces into s to form a sentence such that every token is in wordDict. Return all possib...

Coding & AlgorithmsBacktracking & Recursion
14
0
241 people solved
Jan 15, 2026
Robinhood logo
Robinhood
Hard
Data Scientist

Prove causality for trading metric drop

Goal You need to separate market-driven fluctuations from a product-caused decline in executed_trades per active user around a known release on 2025-0...

Statistics & MathCausal InferenceTime Series & Forecasting
7
0
88 people solved
Oct 13, 2025
The Trade Desk logo
The Trade Desk
Medium
Software EngineerSenior+ Locked

Calculate Bowling Game Score

This question evaluates a candidate's ability to implement rule-based scoring logic, array processing, and stateful iteration to correctly aggregate f...

Coding & Algorithms
2
0
38 people solved
Jun 2, 2026
Snapchat logo
Snapchat
Hard
Software Engineer

Design product co-occurrence analytics API

Design RESTful APIs for Co‑Purchase Analytics Context You are designing backend APIs to power a "related products" module based on co‑purchase behavio...

System Design
5
0
77 people solved
Sep 6, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Answer core behavioral questions using STAR

Behavioral Questions Answer the following questions. Use concrete examples from your experience. 1. Tell me about a proud project. 2. How did you hand...

Behavioral & Leadership
6
0
73 people solved
Dec 15, 2025
Meta logo
Meta
Hard
Data Scientist

Design and evaluate P2P payments in messaging

P2P Payments in a Large Messaging App — Design, Measurement, and Risk Plan You are a data scientist at an at-scale messaging platform evaluating a Ven...

Analytics & Experimentation
5
0
44 people solved
Oct 13, 2025
Amazon logo
Amazon
Easy
Product ManagerSenior+

Describe using customer data

Describe using customer data Tell me about a time you used customer data to shape or build a product. How did you identify the customer problem, what ...

Behavioral & LeadershipProject Deep Dive
13
0
132 people solved
Jul 19, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Solve budget queries and shortest path

1) Budgeted purchases with sorted array: You are given an array prices of n positive integers and q budget queries. For each budget B, you may buy ite...

Coding & Algorithms
4
0
79 people solved
Aug 1, 2025
Meta logo
Meta
Medium
Data Scientist

Define Metrics and Account for Network and Novelty Effects

Metrics for Notification-Triggered In-App Surveys Meta's notification system triggers optional in-app surveys to measure user sentiment after notifica...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
67
0
104 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer

Maintain top N payers

Maintain top N payers Implement topNPayers(n) that returns the n accounts with the highest cumulative outgoing payment amounts as strings formatted "{...

Coding & Algorithms
2
0
44 people solved
Aug 9, 2025
Meta logo
Meta
Medium
Data Scientist

Design A/B Test for Short-Video Recommendation Algorithm

Design A/B Test for Short-Video Recommendation Algorithm A/B Test: New Short‑Video Recommendation Algorithm Context You are evaluating a new recommend...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
10
0
90 people solved
Aug 4, 2025
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