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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
Google logo
GoogleBloombergAmazon
Easy
Software Engineer

Count Differing Positions in Two Binary Integers

Count Differing Positions in Two Binary Integers Given nonnegative integers x and y, return the number of binary bit positions where their bits differ...

Coding & AlgorithmsBit Manipulation
1
0
8 people solved
Amazon logo
AmazonGoogleMeta

Also asked at Meta, Microsoft, Bloomberg, Oracle, Uber

Medium
Software Engineer

Largest Equal Candy Portion for Every Child

Problem You may divide each pile in candies into smaller piles, but cannot merge candies from different original piles. Give each of k children one po...

Coding & AlgorithmsBinary Search
0
0
6 people solved
Waymo logo
Waymo
Easy
Data Scientist Locked

Use Bayes to interpret a broken radar alarm

This question evaluates Bayesian probabilistic reasoning, understanding of base rates, sensitivity/specificity, decision-theoretic trade-offs between ...

Analytics & ExperimentationProbabilityHypothesis Testing
26
0
347 people solved
Jan 17, 2026
Datadog logo
Datadog
Easy
Software Engineer

Implement buffered file writer with concurrency support

You are given a simple file writer class that writes data directly to disk: `cpp class FileWriter { public: // Append data to the file on disk imm...

Coding & AlgorithmsData Structure DesignConcurrency
101
0
1071 people solved
Dec 2, 2025
Meta logo
Meta
Medium
Data Engineer

Solve SQL and Python coding tasks

You are given a small library system with the following relational schema and several Python data-processing tasks. Answer the SQL questions and imple...

Coding & AlgorithmsSQLDynamic Programming
82
6
554 people solved
Nov 20, 2025
Roblox logo
Roblox
Medium
Data Scientist

Match requests and accepts into friendships in SQL

Given two event tables, write a single SQL query (PostgreSQL) to output unique undirected friendships with the earliest valid friendship_date. Schema ...

Data Manipulation (SQL/Python)
6
0
60 people solved
Oct 13, 2025
Axon logo
Axon
Medium
Software Engineer

Design fulfillment truck routing and inventory system

Scenario You are designing the software platform for a large e-commerce fulfillment network that plans truck routes and manages container/inventory mo...

System DesignSystem Design FundamentalsGeo & Delivery Systems
79
1
915 people solved
Mar 1, 2026
Pinterest logo
Pinterest
Hard
Machine Learning Engineer

Insert parentheses to minimize expression value

You are given a string expression of the form A+B, where A and B are non-empty strings of digits (no digit is '0'). You must insert exactly one pair o...

Coding & AlgorithmsArrays & StringsMath & Number Theory
12
1
223 people solved
Feb 9, 2026
Expedia logo
Expedia
Hard
Software Engineer

Solve three interview coding problems

This interview report described three coding tasks: 1. Generate a run-length spoken sequence Start with s1 = "1". To build the next term, read the ...

Coding & AlgorithmsArrays & StringsBacktracking & Recursion
12
0
168 people solved
Jan 6, 2026
Databricks logo
Databricks
Hard
Software Engineer

Find shortest path in a Fibonacci-ordered tree

You are given a recursively-defined binary tree T(order) whose shape depends only on order (not on node values). Nodes are labeled 0..N-1 using preord...

Coding & AlgorithmsTrees
47
0
350 people solved
Nov 6, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Implement an Extensible Chatbot App

Implement a ChatApp class that processes user messages and routes them to bot responders. The system must support multiple bot types, and the design m...

Software Engineering FundamentalsLow-Level Design (OOP)
27
0
423 people solved
Apr 26, 2026
Microsoft logo
Microsoft
Medium
Software EngineerIntern

Minutes Until Rot Spreads to Every Fresh Cell in a Grid

A rectangular grid shows the cells of a crate of fruit. Each cell is empty, holds a fresh piece of fruit, or holds a rotten piece. Rot spreads once pe...

Coding & AlgorithmsGrids & Matrices
1
0
9 people solved
Aug 11, 2026
OpenAI logo
OpenAI
Medium
Product Manager

Launch strategy for a memory-recording invention: first segment, pricing and growth

Imagine you have built a "memory machine." Explain how you would bring it to market. `hint Define the machine before the market The prompt never says ...

Product Design & StrategyProduct StrategyGrowth & Monetization
0
0
8 people solved
Jul 9, 2026
Voleon logo
Voleon
Medium
Quantitative Researcher

Plane Tangent Vectors from Coplanar 3D Points via SVD, With and Without Gaussian Noise

You are given $N$ points $p_1, \dots, p_N$ in three-dimensional space and told that they all lie on one plane. Find tangent vectors of the plane, that...

Statistics & MathSampling & EstimationUnsupervised Learning
8
0
111 people solved
Oct 31, 2025
Google logo
Google
Easy
Software Engineer Locked

Deterministic Task Execution Order

This question evaluates a candidate's ability to model task dependencies as a directed graph and produce a valid execution order, a core graph algorit...

Coding & Algorithms
7
3
101 people solved
Jun 22, 2026
OpenAI logo
OpenAI
Easy
Software Engineer

Design a Payment System

Design a Payment System Design the backend payment system for an online platform that charges customers for goods and services (for example, a marketp...

System Design
9
0
123 people solved
Mar 16, 2026
Atlassian logo
Atlassian
Medium
Software Engineer

Store a hierarchy and return all children

Design a service to store a hierarchical tree of nodes and expose APIs. Requirements: - Persist a hierarchy (a forest with multiple roots is acceptabl...

System Design
12
1
180 people solved
Jan 5, 2026
Amazon logo
AmazonGoogleMicrosoftZoho

Also asked at Microsoft, Zoho

Easy
Software Engineer

Most Words in One Sentence

Problem Each string in sentences is a nonempty sentence of lowercase English words separated by a single space, with no leading or trailing spaces. Re...

Coding & AlgorithmsArrays & Strings
0
0
10 people solved
Voleon logo
Voleon
Hard
Software Engineer

Count White Balls After K Steps

You are given a ring of N positions indexed from 0 to N-1. - At each position i, there is initially one ball whose color is either white or black. - E...

Coding & AlgorithmsMath & Number Theory
50
0
443 people solved
Feb 10, 2026
Ziprecruiter logo
Ziprecruiter
Easy
Machine Learning Engineer Locked

Find Neighboring Records by Identifier

This question evaluates understanding of ordered data traversal and efficient lookup design, assessing competency with data structures, indexing and r...

Coding & Algorithms
5
0
51 people solved
May 6, 2026
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