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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
Coupang logo
Coupang
Medium
Data Scientist Locked

Monthly Cohort Retention

This question evaluates practical SQL skills in user retention analysis, specifically the ability to build a monthly cohort retention table from raw a...

Data Manipulation (SQL/Python)Segmentation & Cohort AnalysisSQL
6
0
68 people solved
Jun 8, 2026
NVIDIA logo
NVIDIA
Medium
Data EngineerSenior+

Design a GPU Telemetry Collection and Analytics Platform

Design a platform that collects GPU telemetry from a large compute environment and exposes both high-level trend analytics and low-level drilldowns. T...

System Design
9
1
81 people solved
May 3, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Design in-memory delivery billing core APIs

This question evaluates a candidate's skills in designing efficient in-memory data structures and APIs for billing scenarios, including driver and del...

System DesignData Structure Design
44
0
299 people solved
Dec 8, 2025
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Maximize Boxes Stored Through One Entrance

This question evaluates array manipulation, constraint reasoning, and optimization skills, touching on greedy and combinatorial allocation concepts un...

Coding & AlgorithmsGreedySorting
10
0
110 people solved
May 19, 2026
Stripe logo
Stripe
Medium
Software Engineer

Implement multi-network card validator with Luhn

Design and implement a payment card validation module that supports multiple networks and error scenarios. Requirements: 1) Luhn checksum - Implement ...

Coding & Algorithms
13
0
103 people solved
Sep 6, 2025
Discord logo
Discord
Medium
Software EngineerNew Grad

Demonstrate effective AI-assisted coding workflow

In an interview where you are allowed to use an AI coding assistant, you are given a large scoped task (e.g., implementing a TCP chat server). The int...

Software Engineering FundamentalsAI-Assisted DevelopmentTesting & Quality
17
0
351 people solved
Jan 27, 2026
DoorDash logo
DoorDash
Hard
Data Scientist

Build a late-delivery risk model

Predict Late Delivery Risk at Order Creation Context You are given an anonymized dataset of marketplace orders with timestamps, store/customer/market ...

Machine LearningSupervised LearningFeature Engineering
15
0
138 people solved
Oct 13, 2025
Rippling logo
Rippling
Medium
Software Engineer

Compute max simultaneous drivers last 24 hours

Given delivery intervals (driverId, startTime, endTime) already recorded, implement maxSimultaneousDriverInPast24Hours() that returns the maximum numb...

Coding & AlgorithmsIntervals & SchedulingData Structure Design
39
0
277 people solved
Jul 31, 2025
Robinhood logo
Robinhood
Medium
Data Scientist

Design Real-Time Analytics Pipeline with Kafka and Flink

Design Real-Time Analytics Pipeline with Kafka and Flink Real-Time Clickstream Analytics Pipeline with Kafka and Flink Scenario You need to design a r...

Behavioral & LeadershipBatch & Stream ProcessingMessaging & Event-Driven
14
0
142 people solved
Aug 4, 2025
Garmin logo
Garmin
Medium
Software EngineerIntern

Value on the Secondary Diagonal of a Center-Out Clockwise Spiral Matrix

An n x n matrix with an odd n is filled with the integers 1 to n * n in a clockwise spiral that starts in the center cell and winds outward to the edg...

Coding & AlgorithmsGrids & Matrices
1
0
19 people solved
Apr 14, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a CI/CD system with stuck-job handling

This question evaluates a candidate's competence in designing fault-tolerant distributed systems, focusing on state management, failure detection, saf...

System DesignJob Scheduling & Workflows
62
0
465 people solved
Dec 15, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Implement topological sort and tree boundary traversal

You are given two separate coding tasks. Problem A — Order courses with prerequisites You have n courses labeled 0..n-1 and a list of prerequisite pai...

Coding & AlgorithmsGraphsTrees
34
0
600 people solved
Feb 12, 2026
Coinbase logo
Coinbase
Hard
Software Engineer

Design a Cryptocurrency Trading System with Third-Party Exchanges

Design a Cryptocurrency Trading System with Third-Party Exchanges Design a cryptocurrency trading platform that routes client orders to one or more th...

System DesignTrading SystemsDistributed Transactions & Idempotency
38
0
321 people solved
Aug 4, 2025
Jane Street logo
Jane Street
Medium
Quantitative Trader

Two Opaque Boxes: Place or Take for Maximum Expected Payoff

You are playing a one-player game with two opaque boxes, both of which start empty. The game lasts exactly 100 turns, and on every turn you must choos...

Coding & Algorithms
6
0
93 people solved
Aug 3, 2025
Applied Intuition logo
Applied Intuition
Easy
Software Engineer

Evaluate variables in simple arithmetic DSL

You are given a small DSL (domain-specific language) consisting of variable assignments, one per line. Each line has the form: `text <identifier> = <e...

Coding & Algorithms
10
0
82 people solved
Dec 1, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Find the Lowest Common Ancestor Using Parent Pointers

Problem Nodes in a rooted forest have parent pointers but no child lists and no root pointer. Given the parent relationship and two node indices, retu...

Coding & Algorithms
3
0
40 people solved
Apr 11, 2026
Airbnb logo
Airbnb
Medium
Data Scientist

Compute C/T metrics from bookings and visits

Given two tables, compute control vs treatment (C/T) metrics, apply 24‑hour attribution, and generate a daily plot. Treat “today” as 2025‑09‑01; use t...

Data Manipulation (SQL/Python)SQLData Cleaning & Wrangling
29
0
268 people solved
Oct 13, 2025
Two Sigma logo
Two Sigma
Hard
Data Scientist

Smallest Palindrome Strictly Greater Than K

A palindrome is a positive integer whose decimal representation reads the same forwards and backwards, with no leading zeros. For example, 7, 44, 121,...

Coding & Algorithms
4
0
59 people solved
Nov 28, 2025
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Design a Scheduler and Metrics Platform

Design a cloud-native job scheduling and metrics monitoring platform for a Kubernetes-like environment. The platform should allow internal users to su...

System Design
7
0
69 people solved
Feb 20, 2026
Instacart logo
Instacart
Medium
Software Engineer Locked

Design and Release a Consistent Dark-Store Inventory System

Design a consistent dark-store inventory system with relational transactions, reservations, retries, reconciliation, CI/CD, and safe Kubernetes rollou...

System DesignTransactions & IsolationCI/CD & Deployment
3
0
25 people solved
Aug 28, 2026
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