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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
Amazon logo
AmazonArcesiumMicrosoftIBM

Also asked at Microsoft, IBM

Medium
Software Engineer

Group Circular Ones with Arbitrary Swaps

Problem The first and last positions of the binary array nums are adjacent, making the array circular. In one operation, swap the values at any two di...

Coding & AlgorithmsTwo Pointers & Sliding WindowGreedy
1
0
9 people solved
Rippling logo
Rippling
Hard
Software Engineer Locked

Design an Extensible Expense Validation Engine

Design an extensible expense validation engine that handles per-item, trip-wide, and cross-type rules while reporting every violation.

Software Engineering Fundamentals
44
1
310 people solved
Aug 23, 2026
Salesforce logo
Salesforce
Medium
Software Engineer

Sum a Matrix After Row and Column Assignments

Sum a Matrix After Row and Column Assignments An n x n matrix starts with every entry equal to zero. You are given a 0-indexed array queries, where ea...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
0
0
8 people solved
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Yandex, Meta, Bloomberg, Reliance Retail

Easy
Software Engineer

Sum the Two Diagonals Without Double Counting

Problem For the square integer matrix mat, add every entry on either main diagonal. An entry lying on both diagonals contributes only once. Return the...

Coding & AlgorithmsGrids & Matrices
0
0
8 people solved
Amazon logo
Amazon
Medium
Software Engineer Locked

Explain Decoder-Only LLM Architecture and How vLLM Serves It Efficiently

A two-part conversational question for AI infrastructure roles: explain how a decoder-only transformer turns a prompt into next-token probabilities, t...

Machine LearningLLM Inference & ServingTransformers & Attention
5
0
41 people solved
Sep 5, 2026
Decagon logo
Decagon
Medium
Software Engineer Locked

Design a Tic-Tac-Toe Engine

This question evaluates algorithm design and data structure competency, emphasizing state representation, time-space trade-offs, and techniques for ac...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
30
0
235 people solved
Feb 17, 2026
Cubist logo
Cubist
Medium
Software Engineer

Design a reusable event-driven framework for trading strategies

As a take-home project, build a framework for trading strategies, including an event-handling layer, that a team will keep using and extending after y...

Software Engineering FundamentalsLow-Level Design (OOP)Code Quality & Maintainability
0
0
13 people solved
Aug 17, 2026
Amazon logo
AmazonTCSGoogle

Also asked at Google, Meta, Infosys, Bloomberg, Microsoft, Qualcomm

Medium
Software Engineer

Locate a Guaranteed Mountain Peak Logarithmically

Problem arr is guaranteed to rise strictly to one interior peak and then fall strictly. Return the peak's zero-based index using O(log n) time. `cpp c...

Coding & AlgorithmsBinary Search
1
0
10 people solved
Chicago Trading Company logo
Chicago Trading Company
Medium
Software EngineerNew Grad Locked

Implement a Unique Pointer and Vector

This question evaluates understanding of C++ resource management, RAII, ownership and object lifetime semantics, move versus copy semantics, exception...

Software Engineering Fundamentals
14
0
103 people solved
Jun 10, 2026
Instacart logo
Instacart
Medium
Software Engineer Locked

Specify the Lowest Price Across Percentage and Buy-X-Get-Y Discounts

Clarify percentage and buy-x-get-y pricing rules, then reason about the cheapest legal discount combination, quantity thresholds, interactions, and ro...

Software Engineering FundamentalsDynamic Programming
2
0
37 people solved
Sep 11, 2026
Vanta logo
Vanta
Medium
Software Engineer Locked

Review and Debug an AI Chatbot

Review and debug an AI chatbot across policy, prompts, retrieval, model calls, tools, post-processing, and user presentation. Build a traceable error ...

ML System DesignDebuggingLLM Applications
16
0
139 people solved
Jul 13, 2026
Airbnb logo
Airbnb
Hard
Software EngineerSenior+

How do you conduct a code review exercise?

In a live interview, you are shown a short code change — a diff, a pull request, or a standalone function — and asked to produce written code review c...

Software Engineering FundamentalsCode Quality & Maintainability
30
0
538 people solved
Jan 19, 2026
Plaid logo
Plaid
Medium
Software Engineer

Compute discounted prices in a queue

Given an integer array prices where prices[i] is the price of the i-th item in a checkout line, apply the following rule: for each i, find the first j...

Coding & AlgorithmsStacks & Queues
39
0
569 people solved
Sep 6, 2025
Headway logo
Headway
Medium
Software EngineerSenior+ Locked

Explain a Challenging Project, Influence, and Mentorship

Build a coherent behavioral interview narrative spanning a challenging technical project, influence without authority, and mentorship. Clarify your ow...

Behavioral & Leadership
4
0
44 people solved
Jun 15, 2026
Walmart Labs logo
Walmart Labs
Medium
Software Engineer

Compute days until plants stop dying

You are given a row of plants, each with an integer pesticide level. Rules - On each day, any plant with a strictly greater pesticide level than the p...

Coding & AlgorithmsStacks & Queues
26
0
477 people solved
Mar 1, 2026
Tesla logo
Tesla
Easy
Software Engineer Locked

Shortest Bridge to Connect Two Islands

This question evaluates understanding of grid-based graph traversal, specifically combining flood fill with multi-source breadth-first search. It test...

Coding & Algorithms
15
0
104 people solved
Jun 29, 2026
Box logo
Box
Hard
Machine Learning Engineer Locked

Improve Keyword Search Ranking

This question evaluates an ML engineer's search system design competency, including information retrieval and ranking principles, feature and model se...

ML System DesignRanking ModelsAnnotation & Label Quality
25
0
174 people solved
Jun 5, 2026
Google logo
GoogleMicrosoftAmazon

Also asked at Amazon, Bloomberg, Apple, Meta, LinkedIn

Medium
Software Engineer

Find the Largest Supported Citation Threshold

Problem Return the largest integer h for which at least h papers each have at least h citations. citations contains one nonnegative count per paper. `...

Coding & AlgorithmsSorting
1
0
13 people solved
Google logo
GoogleMetaAmazonMicrosoft

Also asked at Amazon, Microsoft

Medium
Software Engineer

Earliest Tree Level With the Largest Sum

Problem The root is at level 1 and each child is one level below its parent. Return the smallest level number whose node values have the maximum sum a...

Coding & AlgorithmsTreesStacks & Queues
0
0
10 people solved
StackAdapt logo
StackAdapt
Medium
Machine Learning Engineer Locked

Rebuild a Binary Tree From Preorder and Inorder Sequences, Returned in Level Order

Reconstruct a binary tree with distinct values from its preorder and inorder traversals and return it in level-order form with null markers. Tests how...

Coding & AlgorithmsTrees
7
0
61 people solved
Sep 9, 2026
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