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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
ByteDance logo
ByteDance
Medium
Data Scientist

Calculate Triangle Probability From Broken Stick

A stick of length 1 is broken into three pieces by choosing two cut points independently and uniformly at random along the stick, then sorting the two...

Statistics & MathProbability
14
0
109 people solved
Apr 19, 2026
OpenAI logo
OpenAI
Medium
Product Manager

Pinning Down What an LLM Hallucination Is: Types, Causes and Boundaries

What is a hallucination in a large language model? Give a definition precise enough to build on. `hint Name the yardstick An output can only be "made ...

Machine LearningAI Product ManagementLLM Applications
2
0
17 people solved
Apr 11, 2026
Google logo
GoogleMicrosoftBloomberg

Also asked at Bloomberg, Amazon, Accenture, Meta

Easy
Software Engineer

Find the Next Number with a Divisible Digit Product

Find the Next Number with a Divisible Digit Product Problem Given positive integers n and t, return the smallest integer greater than or equal to n wh...

Coding & AlgorithmsMath & Number Theory
0
0
10 people solved
Databricks logo
Databricks
Medium
Software Engineer

Design a rolling event tracker with ranges

Design a rolling event tracker that supports time-based queries. Implement a data structure with: ( 1) record(timestamp): record one event at integer ...

Coding & AlgorithmsData Structure DesignIntervals & Scheduling
32
0
273 people solved
Aug 7, 2025
DoorDash logo
DoorDash
Hard
Software EngineerSenior+

Design review system with voting and rewards

Design a Scalable Product Review System with Voting and Rewards You are designing a reviews feature for a large e-commerce marketplace. Customers can ...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
44
0
456 people solved
Sep 6, 2025
Qualcomm logo
Qualcomm
Medium
Software EngineerNew Grad

Explain Compiler Pipeline and LLVM Backend

You are interviewing for a compiler engineer role. Explain the major stages of a modern compiler, then discuss common optimization techniques and how ...

Software Engineering Fundamentals
11
0
102 people solved
Apr 7, 2026
ByteDance logo
ByteDance
Medium
Software EngineerIntern Locked

Enumerate All Simple Directed Cycles

Enumerate distinct simple directed cycles using a canonical representation that handles rotations, opposite directions, and self-loops.

Coding & AlgorithmsGraphsBacktracking & Recursion
3
0
43 people solved
Aug 23, 2026
Amazon logo
AmazonGoogle
Medium
Software Engineer

Maximize Binary Row Values with Row and Column Toggles

Problem In the binary rectangular grid, a move flips every bit in one chosen row or one chosen column. Interpret each row as a binary number with its ...

Coding & AlgorithmsGreedyBit Manipulation
0
0
7 people solved
Anthropic logo
Anthropic
Hard
Software Engineer

Scale crawler with thread pool

Concurrent Web Crawler — Bounded Thread Pool, Thread-Safe Frontier, Dedupe, Politeness, and Trade-offs You are refactoring an existing single-threaded...

System DesignConcurrency
27
0
517 people solved
Sep 6, 2025
Jane Street logo
Jane Street
Hard
Machine Learning Engineer

Predict future time-series values

Predict future time-series values End-to-End Time-Series Forecasting (PyTorch) Context You are given one or more regularly sampled numeric time series...

ML System DesignTime Series & ForecastingML Coding
40
0
434 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

How do you choose a model?

This question evaluates skills in model selection, task and business-objective definition, data-property analysis, production constraint reasoning, ba...

Machine LearningSupervised LearningML System Design
14
0
134 people solved
Mar 10, 2026
TikTok logo
TikTok
Medium
Software Engineer

Delete nodes in linked list and binary tree

You are asked to solve two short coding tasks. You may assume standard node definitions: - Singly linked list node: val, next - Binary tree node: val,...

Coding & AlgorithmsLinked ListsTrees
6
0
130 people solved
Feb 11, 2026
Google logo
Google
Medium
Software EngineerIntern

Solve Grid and Counting Problems

A software engineering intern phone screen included two coding tasks: 1. Count islands in a grid Given an m x n grid of characters where '1' repres...

Coding & Algorithms
28
0
433 people solved
Jan 25, 2025
Meta logo
MetaBloombergGoogle

Also asked at Google, Amazon, Microsoft

Medium
Software Engineer

Construct Every BST Shape on Consecutive Keys

Problem Construct every structurally distinct binary search tree containing exactly the keys 1 through n, each once. Return the tree roots in any orde...

Coding & AlgorithmsTreesBacktracking & Recursion
1
0
12 people solved
Anthropic logo
Anthropic
Medium
Software Engineer

Detect duplicate files efficiently

You are given access to a very large file system containing file paths and read access to file contents. Design an algorithm to identify groups of fil...

Coding & AlgorithmsFile & Media Storage
64
1
1139 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Medium
Software Engineer

Order Named Tasks by Dependencies, Choosing the Alphabetically Smallest Order

You are given the names of a set of tasks and a list of dependencies, where a dependency [before, after] means task before must be done before task af...

Coding & AlgorithmsGraphsHeaps & Priority Queues
2
0
24 people solved
May 15, 2026
Google logo
Google
Medium
Software Engineer Locked

Find a Horizontal Cut That Bisects Rectangle Area

Solve a computational-geometry problem that asks for the horizontal line dividing the combined area of many disjoint rectangles in half. The exercise ...

Coding & AlgorithmsBinary SearchMath & Number Theory
28
2
222 people solved
Jun 4, 2026
Salesforce logo
Salesforce
Medium
Software Engineer

Flatten nested JSON into a string map

Problem You are given an input JSON object that may contain nested objects and arrays. Your task is to flatten it into a single-level key/value mappin...

Coding & AlgorithmsParsing & Interpreters
72
0
507 people solved
Oct 18, 2025
Uber logo
Uber
Easy
Data ScientistSenior+

Measure feature impact with switchback, PSM, and CACE

You work at a ridesharing company and want to measure the impact of a new membership feature on rides-per-user (RPU). Across the parts below you will ...

Analytics & ExperimentationCausal InferenceExperiment Design (A/B Testing)
51
0
347 people solved
Dec 11, 2025
Meta logo
Meta
Medium
Software Engineer Locked

Validate Sorted Order Under a Custom Alphabet

This question evaluates a candidate's ability to apply custom ordering rules and string comparison logic, a common variant of array and string validat...

Coding & Algorithms
5
0
40 people solved
Jun 20, 2026
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