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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
Capital One logo
Capital One
Hard
Data Scientist

Design and analyze a card signup A/B test

A/B Test Design: Co‑Branded Gym Credit Card Offer Context: You will A/B test a 3‑month free gym membership offer shown on the application landing page...

Analytics & ExperimentationExperiment Design (A/B Testing)Business Case Analysis
14
0
136 people solved
Oct 13, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Design in-memory trade subscription processor

You are asked to design and implement the internal logic of an in-memory trade subscription processor in C++. A simplified interface is provided: `cpp...

System DesignData Structure DesignConcurrency
18
0
372 people solved
Oct 16, 2025
Databricks logo
Databricks
Medium
Data Scientist

Explain Linear Regression Feature Transformation Equivalence

Explain Linear Regression Feature Transformation Equivalence Linear Regression Feature Representations and High-Dimensional Modelling Context You are ...

Machine LearningRegression & Statistical Modeling
13
0
124 people solved
Aug 4, 2025
Scale AI logo
Scale AI
Medium
Software Engineer

Design a large-scale ticketing system

Design an online ticketing system similar to Ticketmaster that supports very high concurrency for popular events where many users try to purchase tick...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
59
0
468 people solved
Dec 8, 2025
Zomato logo
Zomato
Medium
Product Manager

Zomato restaurant insights product: design it, price it and plan its go-to-market

As a product manager at Zomato, you are asked to create a data product that restaurants would pay for. Propose what the product is and whom it serves,...

Product Design & StrategyProduct StrategyGrowth & Monetization
0
0
12 people solved
Jun 7, 2026
TikTok logo
TikTokInfosysAmazon

Also asked at Amazon, Google, Microsoft, Oracle, Squarepoint, Bloomberg, Sprinklr

Medium
Machine Learning Engineer

Determine frog reachability across stones

You are given a sorted array of distinct integers stones representing stone positions in a river, where stones[0] = 0. A frog starts on stone 0; its f...

Coding & Algorithms
10
0
75 people solved
Circle logo
Circle
Medium
Software Engineer

Implement a simplified multi-level banking system

Implement a simplified multi-level banking system Implement a simplified banking system with multi-level requirements. All operations accept a stringi...

Coding & AlgorithmsPayments & LedgersData Structure Design
24
0
216 people solved
Jul 17, 2025
Robinhood logo
Robinhood
Medium
Data Scientist

Write SQL and Python for transaction analytics

You are given user and transaction data. Part A (SQL): Use a join and window functions to answer the prompts below using the following schema and samp...

Data Manipulation (SQL/Python)SQL
21
0
297 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Low-Level Design of a Logging Library Shared by Many Threads

Design a logging framework for a service in which many threads write log messages at the same time. Model the classes and how they relate to each othe...

Software Engineering FundamentalsLow-Level Design (OOP)Concurrency
1
0
20 people solved
Apr 2, 2026
Mercor logo
Mercor
Medium
Software Engineer

Make a Dict-Based Memoization Cache Safe for Concurrent Threads

A slow, expensive function is wrapped in a module-level dictionary that memoizes its results: `python cache = {} def compute(x): if x in cache: ...

Software Engineering FundamentalsConcurrencyProgramming Languages
5
0
51 people solved
May 31, 2026
Amazon logo
AmazonMicrosoftGoogleBloomberg

Also asked at Google, Bloomberg

Medium
Software Engineer

Find Each Interval's Nearest Eligible Starting Interval

Find Each Interval's Nearest Eligible Starting Interval You are given intervals [start_i,end_i] with unique starting points. For each interval i, find...

Coding & AlgorithmsBinary SearchIntervals & Scheduling
0
0
7 people solved
Apple logo
Apple
Medium
Data Scientist

Design Siri-vs-GPT query routing

You are a Data Scientist at Apple designing a feature that decides whether a user's natural-language query should be routed to Siri or to a GPT-based ...

Machine LearningML System DesignModel Evaluation
17
0
205 people solved
Jan 4, 2026
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Demonstrate Leadership and Ownership

Describe a situation where you demonstrated leadership and ownership without depending on formal authority. Clarify the outcome you owned, how you org...

Behavioral & Leadership
4
0
37 people solved
Aug 21, 2026
Yelp logo
Yelp
Easy
Data Scientist Locked

Estimate Experiment Duration with Power Analysis

Estimate A/B test sample size and duration for a binary metric. Connect alpha, power, baseline rate, and minimum detectable effect to traffic, trigger...

Analytics & Experimentation
2
0
24 people solved
Aug 27, 2026
Microsoft logo
MicrosoftBloomberg
Hard
Software Engineer

Kth Distinct Amount Using One Denomination

Kth Distinct Amount Using One Denomination You are given distinct coin denominations in coins and a positive integer k. An unlimited number of coins o...

Coding & AlgorithmsMath & Number TheoryBinary Search
1
0
9 people solved
OpenAI logo
OpenAI
Hard
Software Engineer

Build a Reliable Streaming Chat UI

You are building a React-based chat interface where assistant responses stream into the UI token by token in real time (the same UX as a typical LLM c...

Software Engineering FundamentalsReact & UI FrameworksReal-Time Systems
27
0
310 people solved
Apr 4, 2026
Salesforce logo
Salesforce
Medium
Software Engineer Locked

Maximal Square and Longest Increasing Subsequence

Implement two independent analyses: the largest all-ones square in a binary matrix and the length of a strictly increasing subsequence. Account for em...

Coding & AlgorithmsDynamic ProgrammingBinary Search
8
0
163 people solved
Jul 9, 2026
ByteDance logo
ByteDance
Medium
Machine Learning Engineer Locked

Explain Sampled-Softmax Correction and Classification Loss Choice

A recommendation model must choose one item from a very large catalog. Cover data and labels, leakage-safe features, baselines and model choice, offli...

Machine Learning
4
0
56 people solved
Jul 24, 2026
Amazon logo
Amazon
Hard
Software Engineer Locked

Design a Recursive File-Search API

Design a secure recursive file-search API with exact error messages, deterministic result ordering, explicit symbolic-link and permission policies, an...

Software Engineering FundamentalsAPI DesignApplication Security
17
0
161 people solved
Aug 11, 2026
eBay logo
eBay
Medium
Software Engineer Locked

Explain Why You Want to Join This Company

Prepare a credible explanation of why you want to join a company by connecting personally verified product, engineering, and role details to experienc...

Behavioral & Leadership
4
0
30 people solved
Aug 5, 2026
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