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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
Rubrik logo
Rubrik
Hard
Software Engineer

Find largest connected group of overlapping intervals

You are given n people, where person i works during an inclusive time interval [start_i, end_i]. Define a communication graph: - Each person is a node...

Coding & AlgorithmsIntervals & SchedulingGraphs
13
0
179 people solved
Feb 12, 2026
IBM logo
IBM
Easy
Software Engineer Locked

Sum the XOR of Every Cross-Array Pair

Compute the sum of XOR values across every pair drawn from two integer arrays without enumerating the full Cartesian product. The problem tests bit-fr...

Coding & Algorithms
6
0
61 people solved
Aug 18, 2026
Anthropic logo
Anthropic
Medium
Machine Learning Engineer Locked

Implement an LRU cache

This question evaluates competency in designing efficient key-value caching mechanisms, enforcing capacity constraints and eviction policies while mai...

Coding & AlgorithmsData Structure Design
26
0
407 people solved
Feb 27, 2026
Axon logo
Axon
Medium
Machine Learning EngineerSenior+ Locked

Design Video Intelligence for Investigations

This question evaluates a candidate's competency in designing scalable, multimodal video intelligence systems that integrate machine learning, informa...

ML System DesignSearch RelevanceComputer Vision
24
0
186 people solved
May 26, 2026
Notion logo
Notion
Easy
Software Engineer

Implement Table Aggregation

You are given a table represented as a list of rows. Each row contains: - key: a string identifying a group - value: an integer Write a function that ...

Coding & AlgorithmsArrays & Strings
58
1
480 people solved
Feb 1, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Handle Upstream Failures in a Payment-Calculation Service

Handle payment-calculation dependency failures with pending states, versioned inputs, bounded retries, idempotent effects, late-event adjustments, and...

Software Engineering FundamentalsFault Tolerance & FailoverDistributed Transactions & Idempotency
17
0
122 people solved
Sep 16, 2026
Stripe logo
Stripe
Easy
Software Engineer

Implement stateful connection router simulator

You are implementing a simplified connection router / load balancer for a Jupyter-like multi-tenant server system. There are N target servers, indexed...

Coding & Algorithms
24
0
293 people solved
Dec 6, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Compute Plant Infection Time

This question evaluates a candidate's understanding of graph traversal and grid-based state propagation, including concepts like breadth-first search,...

Coding & Algorithms
16
0
159 people solved
May 24, 2026
Hudson River Trading logo
Hudson River Trading
Hard
Software Engineer

Explain Python and React performance fundamentals

In a phone screen for a full-stack software engineering role, you may be asked a group of fundamentals questions such as: - Explain what a Python cont...

Software Engineering Fundamentals
18
0
157 people solved
Apr 6, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Design an Asynchronous Video Moderation Pipeline with ML Risk Scores and a Rules Engine

Design an asynchronous video moderation pipeline that scores published videos with many ML risk models, applies configurable rules to the scores, and ...

System DesignSystem Design FundamentalsFault Tolerance & Failover
2
0
20 people solved
Sep 6, 2026
Coupang logo
Coupang
Medium
Data Scientist Locked

Predicting the Next Elevator Call Location

This machine learning question tests the ability to design a predictive model for spatio-temporal demand forecasting, covering problem framing, featur...

Machine LearningSupervised LearningFeature Engineering
8
1
103 people solved
Jun 8, 2026
Siemens logo
Siemens
Medium
Machine Learning EngineerSenior+ Locked

Choose LoRA for Fine-Tuning and Explain Its Limitations

Explain low-rank adaptation, parameter and memory savings, rank and module choices, remaining costs, and deployment limitations compared with full fin...

Machine LearningFine-Tuning & Alignment Techniques
2
0
39 people solved
Sep 4, 2026
ByteDance logo
ByteDance
Medium
Software EngineerIntern

Count Numbers with an Even Number of Digits

Problem Given an array of positive integers, count how many elements have an even number of decimal digits. Function Contract Implement count_even_dig...

Coding & Algorithms
5
0
55 people solved
Apr 20, 2026
OpenAI logo
OpenAI
Easy
Software Engineer Locked

Simulate a Turn-Based Two-Player Game

This question evaluates API design, state management, move validation, board representation, and correctness guarantees for a turn-based game simulato...

Coding & AlgorithmsSimulation & State MachinesLow-Level Design (OOP)
28
0
185 people solved
Feb 13, 2026
C3 AI logo
C3 AI
Medium
Data ScientistIntern

Identify What Does Not Fix Vanishing Gradients

Identify What Does Not Fix Vanishing Gradients Which change is not a reliable remedy for vanishing gradients in a deep neural network: adding skip con...

Machine LearningNeural Networks & Training
2
0
23 people solved
Sep 15, 2026
Robinhood logo
Robinhood
Medium
Backend Engineer

Critique a Recent Engineering Project and Explain What You Would Redo

Critique a Recent Engineering Project and Explain What You Would Redo Choose a meaningful engineering project from roughly the last two years. Give a ...

Behavioral & Leadership
11
0
98 people solved
Jul 17, 2026
Amazon logo
AmazonLTIMindtree
Medium
Software Engineer

Cover the Most White Integer Tiles with One Carpet

Problem Each inclusive interval in tiles colors its integer positions white, and the intervals do not overlap. Place one carpet covering carpetLen con...

Coding & AlgorithmsIntervals & SchedulingTwo Pointers & Sliding Window
0
0
8 people solved
Giga logo
Giga
Medium
Software Engineer

Design an Agentic Ticket Support System

Design an AI-powered ticket support system. The system must integrate with two existing external systems: 1. Ticket system: Displays all support ticke...

ML System Design
17
0
124 people solved
Apr 9, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Product Manager

Market Shifts Reshaping Corporate Cash and Liquidity Management Products

Which recent trends in liquidity solutions for corporate treasurers have caught your attention, and why do they matter? `hint Find the forces first Ra...

Product Design & StrategyMarket & Competitive AnalysisProduct Strategy
1
0
14 people solved
Aug 26, 2026
Stripe logo
Stripe
Hard
Software EngineerSenior+ Locked

Design a Distributed Metrics Counter

This question evaluates a candidate's competency in designing scalable, highly available distributed systems for real-time telemetry ingestion and agg...

System DesignObservabilityStorage & Sharding
30
0
348 people solved
Mar 1, 2026
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