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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Datadog logo
Datadog
Medium
Software Engineer Locked

Match Registered Word Queries Against a Log Stream

Process an ordered stream that registers word queries and reports which prior queries fully match each log message. The specification fixes query IDs,...

Coding & Algorithms
5
0
106 people solved
Jun 30, 2026
Voleon logo
Voleon
Medium
Software Engineer

Simulate an exchange and participation-rate trading

Implement a simplified trading simulation in three parts. Part 1 — Process market data / exchange interaction (order book) Design a minimal limit-orde...

Coding & AlgorithmsTrading SystemsData Structure Design
115
0
935 people solved
Dec 9, 2025
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Design Parsing Boundaries for Interdependent Message Types

A protocol-buffer-related parsing task includes dependencies on newly defined message types. Explain which input and output details you would clarify,...

Software Engineering FundamentalsParsing & InterpretersProgramming Languages
2
0
32 people solved
Jun 17, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Define Success for a New Group Feature Without Hiding Cannibalization

Build a success framework for a social Groups feature by separating adoption from durable user value and measuring cannibalization, network spillovers...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
18
0
150 people solved
Jul 6, 2026
Capital One logo
Capital One
Medium
Software EngineerSenior+

Design an Enterprise Agent Platform with Guardrails and Latency Control

Design an enterprise agent platform. Explain the platform's execution architecture, how you choose between an agent and a predefined workflow, where g...

System DesignAI AgentsAI Safety & Alignment
0
0
10 people solved
Sep 9, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer Locked

Implement Backprop for a Tiny Network

This question evaluates understanding of backpropagation, gradient derivation, numerical stability of softmax cross-entropy, and practical implementat...

Machine LearningML CodingNeural Networks & Training
204
0
1754 people solved
Apr 3, 2026
Optiver logo
Optiver
Medium
Software Engineer Locked

Design a Multi-Level Expiring Item Store

Design a class with initialization, store, and retrieve operations for items placed into ordered storage levels. Make the API or object boundaries exp...

Software Engineering FundamentalsData Structure Design
38
0
412 people solved
Jul 23, 2026
Snowflake logo
Snowflake
Medium
DevOps Engineer Locked

Present Your Infrastructure and Platform Experience

Present one infrastructure or platform project through its users, architecture, reliability model, deployment path, observability, tool choices, and y...

Behavioral & Leadership
10
0
71 people solved
Aug 19, 2026
Microsoft logo
Microsoft
Medium
Data ScientistSenior+ AI Locked

Build and Defend a Baseline Model from a CSV

Practice an end-to-end data science modeling case using a CSV, from defining the target and preventing leakage to choosing a validation split and base...

Machine LearningML System DesignModel Evaluation
20
0
175 people solved
Jun 29, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Calculate Daily Survey Response Rates by Country

Work through a PostgreSQL survey-analysis task that compares impressions and responses by date and country. It exercises careful joins, distinct-user ...

Data Manipulation (SQL/Python)SQL
42
8
500 people solved
Jul 6, 2026
Atlassian logo
Atlassian
Medium
Software Engineer Locked

Diagnose why a scaled system became slow

This question evaluates proficiency in diagnosing performance regressions in scaled production services, emphasizing observability, bottleneck identif...

System DesignReliability & SREObservability
54
0
445 people solved
Jan 22, 2026
Citadel logo
Citadel
Medium
Software EngineerSenior+ Locked

Design a Low-Latency Metrics and Alerting Platform

Design a multi-tenant metrics and alerting platform for time-series ingestion, dashboards, SLO evaluation, and notifications with critical detection u...

System DesignObservabilityStorage & Sharding
52
0
562 people solved
Jul 12, 2026
NVIDIA logo
NVIDIA
Hard
Software EngineerSenior+ Locked

Design a Multi-Producer Multi-Consumer Circular Buffer

Design a fixed-capacity circular buffer for multiple concurrent producers and consumers, with blocking operations and close-and-drain behavior. Explai...

Software Engineering FundamentalsConcurrencyData Structure Design
28
0
265 people solved
Jul 16, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Split a Message into Length-Limited Parts with Numbered Suffixes

This Hudson River Trading software engineering question evaluates message splitting under strict length limits with numbered suffixes. It prepares can...

Software Engineering FundamentalsArrays & Strings
7
0
127 people solved
Jul 2, 2026
Goldman Sachs logo
Goldman Sachs
Easy
Data ScientistIntern Locked

Maximize Covariance from Known Variances

Determine the maximum possible covariance when two random variables have variances 3 and 27.

Statistics & Math
4
0
36 people solved
Sep 2, 2026
Posthog logo
Posthog
Medium
Software Engineer

Design Product Analytics and Event Capture for a Small E-Commerce Store

How would you implement analytics for a small, independently owned e-commerce site? Assume the owner is the main consumer of the results and wants to ...

System DesignSystem Design FundamentalsData Ingestion & CDC
0
0
10 people solved
Sep 12, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Count Matrix Cells Whose Row and Column Neighbors Match

This Hudson River Trading software engineering question asks candidates to count matrix cells whose row and column neighbors match. It is useful for p...

Software Engineering FundamentalsGrids & Matrices
20
0
214 people solved
Jul 2, 2026
Rippling logo
Rippling
Medium
Software Engineer

Design an extensible poker-hand evaluator

Design and implement an object-oriented solution for a simplified two-player poker-like game called Camel Cards. The interviewer is explicitly evaluat...

Software Engineering FundamentalsLow-Level Design (OOP)
86
2
1430 people solved
Jan 11, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Maximum Subarray Sum with a Length Cap

Compute the maximum sum of a nonempty contiguous subarray whose length cannot exceed a given cap. The prompt fixes negative-only behavior, integer-wid...

Coding & Algorithms
6
0
66 people solved
Sep 5, 2026
Bilt Rewards logo
Bilt Rewards
Medium
Software Engineer Locked

Repair and Extend a Transaction Reward Processor

Diagnose and repair a layered transaction reward processor whose tests, file parsing, business-rule calculation, database writes, or queries may be fa...

Software Engineering Fundamentals
6
0
82 people solved
Jul 21, 2026
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