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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
Airwallex logo
Airwallex
Medium
Backend Engineer

Maximum Triangle Path Sum, Overall and Through a Required Cell

A number triangle has n rows. Row i (0-indexed) holds i + 1 integers, so triangle[i][j] exists for 0 <= j <= i. A path starts at the single value in r...

Coding & AlgorithmsDynamic Programming
1
1
32 people solved
Sep 16, 2026
Google logo
GoogleBlackRockAmazon

Also asked at Amazon, Microsoft, Bloomberg, Meta, LinkedIn, Atlassian, Yandex

Medium
Software Engineer

Find Original-Node Common Ancestors in a Search Tree

Problem Given a BST root and two different original nodes p and q in it, return their lowest common ancestor node. A node counts as its own ancestor. ...

Coding & AlgorithmsTrees
2
0
21 people solved
DoorDash logo
DoorDash
Medium
Software EngineerSenior+

Design a Menu Item Review and Rating System for a Food-Delivery Platform

Design the menu review feature of a food-delivery platform. The report names the problem only as "menu review" and notes that it comes with many funct...

System DesignSystem Design FundamentalsAPI Design
11
0
133 people solved
Sep 10, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Select the K-th Largest Value from an Unsorted Array Without a Heap

Given an unsorted array of integers and an integer k, return the k-th largest value in the array. Duplicates count separately: the answer is the value...

Coding & AlgorithmsSorting
5
0
77 people solved
Oct 10, 2026
Visa logo
Visa
Medium
Software Engineer

Java Fundamentals: Polymorphism and Monolith Versus Microservices

This round opened with Java fundamentals. Two of the questions were reported: explain polymorphism, and compare a monolithic architecture with microse...

Software Engineering FundamentalsProgramming LanguagesMicroservices & Service Architecture
7
0
54 people solved
Sep 27, 2026
Plaid logo
Plaid
Medium
Software Engineer Locked

Design an Embeddable Pay by Bank Widget

Design an embeddable Pay by Bank widget that isolates bank authentication inside an iframe and communicates through a validated postMessage channel. T...

System DesignApplication SecurityPayments & Ledgers
63
0
433 people solved
Aug 1, 2026
Affirm logo
Affirm
Medium
Data Analyst

Investigate Rising Loan Delinquency with Stable Approval Rates

Investigate Rising Loan Delinquency with Stable Approval Rates A new loan cohort shows a higher rate of loans that are at least 30 days past due after...

Analytics & ExperimentationMetric DiagnosticsBusiness Case Analysis
3
0
55 people solved
Sep 23, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Design and optimize a RAG system

Question You are building a Retrieval-Augmented Generation (RAG) system for question answering over a private corpus — engineering wikis, design docs,...

ML System DesignRetrieval-Augmented GenerationLLM Applications
114
1
1243 people solved
Dec 15, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Support a Teammate’s Growth and Participation

Tell me about a time you helped a teammate grow or made it easier for them to participate meaningfully in the team's work. Explain what you did and ho...

Behavioral & LeadershipMentoring & Team Growth
1
0
11 people solved
Oct 24, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Consistent Hashing Ring with Virtual Nodes for Shard Rebalancing

This question evaluates a candidate's ability to design and implement a consistent hashing ring with virtual nodes for distributing keys across shards...

Coding & AlgorithmsPartitioning & Consistent HashingData Structure Design
44
0
496 people solved
Jun 26, 2026
Capital One logo
Capital OneCoinbaseMeta

Also asked at Meta, HubSpot, Dropbox, Airbnb, Google, Okta, Bloomberg, Ramp, Amazon

Medium
Software Engineer

Validate Stateful Account Transactions

Problem Implement a Bank object for accounts numbered from 1 through n. The constructor receives the initial balances, with array position i holding t...

Coding & AlgorithmsData Structure DesignSimulation & State Machines
3
0
33 people solved
Waymo logo
Waymo
Medium
Data Scientist Locked

SQL: Users With No Rides in the Most Recent 7-Day Window, Including Non-Riders

Write a PostgreSQL query that lists users with no rides in the most recent 7-day window, including users who never rode. Tests anchoring a date window...

Data Manipulation (SQL/Python)SQL
13
0
118 people solved
Sep 10, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Quantitative Trader

Expected Payoff of a Three N-Sided Dice Matching Game

You roll three fair $N$-sided dice, with faces numbered 1 through $N$. If all three dice show the same number, you receive $A$ dollars. If exactly two...

Statistics & MathProbabilityPuzzles & Brainteasers
5
0
42 people solved
Sep 19, 2026
Google logo
GoogleBloombergAmazon

Also asked at Amazon, Microsoft, Oracle, Goldman Sachs, Meta, LinkedIn, Airbnb, Grab, Uber, Pinterest, Anduril, Palantir, ByteDance, DocuSign

Medium
Software Engineer

Combine Accounts Connected by Shared Addresses

Problem Each account contains a name followed by email addresses. Accounts sharing an address belong to the same person, transitively. Matching names ...

Coding & AlgorithmsGraphsArrays & Strings
3
0
24 people solved
Databricks logo
Databricks
Medium
Software Engineer Locked

Design Chat APIs, Storage, and Message Flows

Design chat APIs and database tables with durable message sends, idempotent retries, ordered history, live delivery, and reconnect recovery.

System DesignAPI DesignAuthentication & Authorization
9
0
169 people solved
Sep 6, 2026
Waymo logo
Waymo
Medium
Software Engineer Locked

2D Max Pooling That Also Returns the Coordinates of Each Window Maximum

Implement 2D max pooling with a k-by-k window and a stride, and for each window also return the row and column of its maximum, breaking ties by smalle...

Coding & AlgorithmsGrids & Matrices
4
0
87 people solved
Sep 10, 2026
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Upstart, Meta, Infosys, LinkedIn, Bloomberg, Oracle, TCS, Apple, Goldman Sachs, NVIDIA, Visa, Accenture, TikTok, Cisco, Yandex, Walmart Labs, Squarepoint

Medium
Software Engineer

Find the Greatest Contiguous Segment Sum

Problem Find the greatest possible sum of a nonempty contiguous subarray of the integer array nums. Return that sum, not the subarray or its endpoints...

Coding & AlgorithmsDynamic ProgrammingBacktracking & Recursion
1
0
15 people solved
Citadel Securities logo
Citadel Securities
Medium
Software Engineer

Conflating Quote Queue That Keeps Only the Latest Price per Symbol

A market data feed pushes quotes for stock symbols; each quote carries a symbol and that symbol's latest ask price as an integer. Quotes can arrive fa...

Software Engineering FundamentalsData Structure DesignProgramming Languages
9
0
87 people solved
Sep 11, 2026
Spotify logo
Spotify
Hard
Software Engineer

Nearest Charger Distances in One-Dimensional Arrays

Solve the following related one-dimensional distance tasks. Indices are zero-based and distance is absolute index difference. The reported variants us...

Coding & AlgorithmsArrays & Strings
1
0
11 people solved
Oct 18, 2026
Palantir logo
Palantir
Medium
Software EngineerIntern Locked

Apply Item Coupons with Exact Per-Item Cent Rounding

Calculate cart totals from item coupons with exact half-even cent rounding, unmatched-coupon handling, and integer monetary totals.

Coding & AlgorithmsMath & Number TheoryArrays & Strings
26
0
188 people solved
Aug 27, 2026
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