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

"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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Apple

Hard

Data Scientist

Compute optimal matrix-chain multiplication order

Matrix Chain Multiplication: Optimal Parenthesization and Analysis You are given five matrices to multiply: A1 (10×30), A2 (30×5), A3 (5×60), A4 (60×2...

Design a Data Service for Downstream Consumers

Design a governed data service with stable APIs, serving projections, cursor and export semantics, freshness evidence, and secure schema evolution.

Chrome Browser Strategy: Vision, Themes and Sequenced Bets Over Three Years

You are a product manager on Google's Chrome team. Lay out a roadmap for the browser covering the next three years: decide where Chrome should be head...

Product Design & StrategyRoadmapping & PlanningProduct Strategy

Next Palindrome with Exact Digit Counts

Problem You are given a nonnegative integer n. A positive integer is special when both conditions hold in its ordinary decimal representation: - It re...

Coding & AlgorithmsBacktracking & RecursionMath & Number Theory

8 people solved

Uber

Medium

Data ScientistSenior+

Design a Maps Address Search Bar

Design the search experience for a map application's address bar, similar to the search box in Google Maps. The system should handle multiple user int...

Analytics & Experimentation

Software EngineerNew Grad

Design Robust Large-Input Processing

The string-reduction algorithm above is now part of a backend service. Each job reads a text object from S3-compatible storage, applies the transforma...

System DesignDebuggingFile & Media Storage

Implement version string comparator with extensions

Implement a function compareVersions(a, b) that compares two software version strings. Each version consists of dot-separated numeric components (e.g....

Coding & AlgorithmsParsing & InterpretersArrays & Strings

Machine Learning Engineer Locked

Count ordered fragment pairs forming a password

This question evaluates proficiency with string manipulation, handling duplicate fragments, and combinatorial reasoning about ordered index pairs that...

Coding & AlgorithmsArrays & Strings

109 people solved

Jan 20, 2026

Find Shortest Unique Prefixes

This question evaluates string-processing skills and understanding of data structures for prefix management (e.g., tries), along with algorithmic effi...

Software Engineer Locked

Design a Neighborhood Newsfeed System

This question evaluates a candidate's ability to design a scalable, privacy-preserving neighborhood social feed system, testing competencies in distri...

System DesignSystem Design FundamentalsSearch & Feed Systems

Solve vault rate and subset-sum

1) Robber vaults rate: You are given an array vaults of positive integers where vaults[i] is the amount in the i-th vault, and an integer h (hours). I...

Coding & AlgorithmsDynamic ProgrammingBinary Search

Find shortest distance between two islands

Problem You are given an R x C binary grid where: - 1 represents land - 0 represents water The grid contains exactly two 4-directionally connected isl...

Coding & Algorithms

103 people solved

Dec 13, 2025

Diagnose a sudden KPI drop and validate causes

A core KPI (comments_per_DAU) suddenly drops materially. Outline a structured root-cause analysis and validation plan. a) Scoping and sanity: Quantify...

Analytics & Experimentation

Software EngineerSenior+

Build a Trust-Aware BIN Database

Build a Trust-Aware BIN Database Implement process_bin_operations(operations) for an in-memory database of card-number prefixes. A prefix identifies a...

Data ScientistSenior+

Design and analyze a free-trial A/B test

A/B Test Design: 1‑Month Free Trial Impact on Paid Subscription Conversion You are evaluating whether offering a 1‑month free trial increases paid sub...

Analytics & ExperimentationExperiment Design (A/B Testing)

Software Engineer Locked

Parse logs and generate NFT attributes

This question evaluates parsing and log-processing skills alongside combinatorics and weighted-sampling competency, covering extraction and time-based...

Coding & AlgorithmsBacktracking & Recursion

Solve three coding interview problems

You are given three independent coding questions. 1) Decode an encoded string Given an encoded string s, decode it using the following rule: - Pattern...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices

321 people solved

Oct 9, 2025

BloombergGoogleAmazon

Hard

Software Engineer

Total Digit Waviness Across a Large Range

Problem Given integers num1 and num2, return the total waviness of all integers in the inclusive range [num1,num2]. Use the ordinary decimal represent...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory

8 people solved

Longest Balanced Substring in a String of Parentheses

Reported from a Meta software engineering coding round. You are given a string s that contains only the characters ( and ). A string is balanced if it...

Coding & AlgorithmsStacks & QueuesDynamic Programming

15 people solved

Mar 26, 2026

Qube Research & Technologies

Hard

Data ScientistIntern

Implement and Tune KNN Classifier

You are given two CSV files for a three-class leaf-classification task. - train.csv contains three numeric feature columns: feature_0, feature_1, and ...

Machine Learning

83 people solved

Jan 12, 2026

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Tech Interview Questions

Compute optimal matrix-chain multiplication order

Design a Data Service for Downstream Consumers

Chrome Browser Strategy: Vision, Themes and Sequenced Bets Over Three Years

Next Palindrome with Exact Digit Counts

Design a Maps Address Search Bar

Design Robust Large-Input Processing

Implement version string comparator with extensions

Count ordered fragment pairs forming a password

Find Shortest Unique Prefixes

Design a Neighborhood Newsfeed System

Solve vault rate and subset-sum

Find shortest distance between two islands

Diagnose a sudden KPI drop and validate causes

Build a Trust-Aware BIN Database

Design and analyze a free-trial A/B test

Parse logs and generate NFT attributes

Solve three coding interview problems

Total Digit Waviness Across a Large Range

Longest Balanced Substring in a String of Parentheses

Implement and Tune KNN Classifier

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