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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
Fora Travel logo
Fora Travel
Medium
Software Engineer Locked

Design Radius-Based Notifications from Mobile Locations

Design a mobile location service that finds users within a radius from their latest non-stale positions and sends notifications. Cover geospatial inde...

System Design
15
0
154 people solved
Aug 16, 2026
LinkedIn logo
LinkedIn
Hard
Machine Learning Engineer Locked

Implement a Text-Embedding Recommender Training Pipeline

Design a local training pipeline for a text-embedding recommender using nested member profiles, item text, and clicked or skipped interactions. The ex...

Machine Learning
22
2
153 people solved
Sep 4, 2026
Amazon logo
AmazonGoogleGusto

Also asked at Gusto, Microsoft, Apple, Faire, Meta, Bloomberg, Goldman Sachs, Roblox, NVIDIA, Palantir

Hard
Software Engineer

Spell a Nonnegative Signed Integer in English Words

Problem Convert num into ordinary English number words using the format illustrated here: capitalized number words separated by single spaces, with Th...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
1
0
13 people solved
Booking.com logo
Booking.com
Medium
Software Engineer Locked

Design an AI-Assisted Development Workflow

Design a practical AI development workflow with bounded tasks, agent prompts, reusable skills, host-enforced hooks, independent checks, and clear revi...

Software Engineering FundamentalsAI-Assisted DevelopmentAI Agents
4
1
59 people solved
Aug 25, 2026
Medium
Software Engineer Locked

Build a Queue Worker with Backoff and a Dead-Letter Queue

Design queue-worker retries with exponential backoff, durable delayed delivery, attempt limits, idempotent effects, and dead-letter replay, including ...

Software Engineering FundamentalsMessaging & Event-DrivenFault Tolerance & Failover
4
0
52 people solved
Sep 17, 2026
Headlands logo
Headlands
Medium
Data Scientist Locked

Minimum Character Replacements So No Two Adjacent Characters Are Equal

Given a string of lowercase letters, find the minimum number of single-position replacements needed so that no two adjacent characters are equal. It t...

Coding & AlgorithmsGreedyArrays & Strings
7
0
82 people solved
Aug 30, 2026
Amazon logo
Amazon
Medium
Software Engineer

Design a Checkout Price Engine with Pluggable Percent, Fixed and Buy-X-Get-Y Discounts

Build the checkout price engine for an e-commerce platform. Given a cart, compute the final price by applying discounts, and return the final total. -...

Software Engineering FundamentalsLow-Level Design (OOP)
6
0
56 people solved
Sep 10, 2026
Quora logo
Quora
Medium
Data Scientist

Test a Post-Creation Tab While Accounting for User Interference

Test a Post-Creation Tab While Accounting for User Interference A question-and-answer platform is considering adding a post-creation tab next to its e...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
1
0
23 people solved
Sep 27, 2026
Jump Trading logo
Jump Trading
Easy
Software Engineer Locked

Expand a Serial and Parallel Task Composition Specification

Parse a serial and parallel workflow specification with nested arguments and quoted text, then expand its alternatives into ordered composed expressio...

Coding & Algorithms
18
0
189 people solved
Aug 12, 2026
Amazon logo
AmazonGoogleBloomberg

Also asked at Bloomberg, Meta, Microsoft, TikTok, Zoho, Grammarly, LinkedIn, Goldman Sachs, TCS, Oracle, Uber, Citadel

Easy
Software Engineer

Return the Floor of a Square Root

Problem For the nonnegative integer value, return its square root rounded downward to an integer. The result must also be nonnegative. You must not us...

Coding & AlgorithmsMath & Number TheoryBinary Search
1
0
13 people solved
Google logo
Google
Hard
Machine Learning Engineer

Interpret Language-Model Perplexity

Interpret Language-Model Perplexity Define perplexity for an autoregressive language model, derive its relationship to average negative log-likelihood...

Machine Learning
7
0
55 people solved
Aug 14, 2026
Coupang logo
Coupang
Medium
Software Engineer Locked

Walk Through Your Proudest Project, What Made It Special, and What You Would Change

Behavioral project deep-dive for software engineers: describe the project you are proudest of, what made it distinctive, what you learned, and what yo...

Behavioral & LeadershipProject Deep Dive
5
0
69 people solved
Aug 27, 2026
Point72 logo
Point72
Medium
Machine Learning Engineer

Review a RAG Answer Function as a Pull Request, Then Write Tests for Its Bugs

You are reviewing a pull request for a question-answering service built on retrieval-augmented generation (RAG) over documents that carry per-user rea...

Software Engineering FundamentalsRetrieval-Augmented GenerationTesting & Quality
0
0
4 people solved
Oct 31, 2026
Infosys logo
InfosysSalesforceAmazon

Also asked at Amazon, Meta, Google

Easy
Software Engineer

Maximum Number of Balanced L/R Pieces

Problem The string s has equally many L and R characters. Partition the entire string into nonempty contiguous pieces, each also containing equal coun...

Coding & AlgorithmsGreedyArrays & Strings
1
0
14 people solved
Jane Street logo
Jane Street
Easy
Software Engineer

Sort trade executions into a canonical order

You are building a small component in a trading system that consumes trade execution records from an upstream feed. The records may arrive out of orde...

Coding & AlgorithmsSorting
146
2
1035 people solved
Dec 15, 2025
Anduril logo
AndurilGoogleAmazon

Also asked at Amazon, Microsoft, PhonePe

Hard
Software Engineer

Measure the Longest Directed Cycle in a One-Exit Graph

Problem In the directed graph represented by edges, each node has at most one outgoing edge. edges[i] gives its destination, or -1 for no edge. Return...

Coding & AlgorithmsGraphs
1
0
20 people solved
Robinhood logo
Robinhood
Medium
Software EngineerSenior+ Locked

Define and Calculate Employee Referral Counts

Compute a referral count for every employee from a list of referrer and referred pairs. The question tests defining direct versus downstream counts, h...

Software Engineering FundamentalsGraphs
9
1
130 people solved
Sep 4, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Find the Earliest Anagram Window

Given a text and pattern, find the first substring whose characters match the pattern with exact multiplicity. The task assesses frequency accounting,...

Coding & Algorithms
13
0
153 people solved
Jun 29, 2026
Accenture logo
Accenture
Medium
Software Engineer

Find minimum racks for 2D bin packing

You are given N machines. Machine i requires two types of resources: (x_i, y_i). Each rack has capacity (A, B) for the two resources, and a machine mu...

Coding & AlgorithmsDynamic Programming
122
0
989 people solved
Oct 7, 2025
Harvey logo
Harvey
Medium
Software Engineer Locked

Find Duplicate Files Safely at Scale

Design a cycle-safe duplicate-file finder with buffered hashing, collision confirmation, bounded traversal state, and crash-aware behavior.

Software Engineering Fundamentals
36
0
244 people solved
Aug 12, 2026
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