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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
AmazonGoogleMicrosoft

Also asked at Microsoft, Meta, Bloomberg, Apple, Infosys, TCS, Zoho, Josh Technology, Meesho

Medium
Software Engineer

Relink Odd Positions before Even Positions Stably

Problem Reorder the original singly linked nodes so positions 1,3,5,... come first, followed by positions 2,4,6,... . Preserve relative order within e...

Coding & AlgorithmsLinked Lists
0
0
8 people solved
Uber logo
Uber
Medium
Data ScientistSenior+

Find the Next Larger Palindrome

Given a positive integer n, return the smallest integer strictly greater than n whose decimal representation is a palindrome. A palindrome reads the s...

Coding & Algorithms
7
0
77 people solved
Apr 10, 2026
Anthropic logo
Anthropic
Hard
Machine Learning Engineer

Design an inference routing and scheduling layer

System Design: Routing Layer for Heterogeneous Inference Backends (GPU/CPU) Context You are asked to design a routing layer that sits between a user-f...

ML System DesignLLM Inference & ServingCaching
64
0
606 people solved
Sep 6, 2025
Coinbase logo
Coinbase
Medium
Software Engineer Locked

Maintain a Moving Average with a Circular Buffer

Maintain one moving average per incoming value using the values seen so far until the window fills, then exactly the latest k values in a circular-buf...

Coding & Algorithms
11
0
83 people solved
May 12, 2026
Glean logo
Glean
Medium
Machine Learning Engineer

Find Earliest Train Route

You are given a discrete train timetable and need to find a valid route through the train network. Each train has an itinerary represented as a sequen...

Coding & Algorithms
24
0
233 people solved
Apr 23, 2026
Whatnot logo
Whatnot
Easy
Software Engineer

Solve Adjacent-Deletion and Sorted-Square Problems

Solve the following coding problems. Discuss the approach and complexity before implementation. Problem 1: Remove adjacent duplicate pairs Given a str...

Coding & Algorithms
9
0
160 people solved
Apr 24, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Longest Run of Ones After One Flip

This question tests a candidate's ability to solve a sliding window problem involving binary arrays, extending the basic "maximum consecutive ones" pa...

Coding & Algorithms
16
0
123 people solved
Jun 23, 2026
Microsoft logo
Microsoft
Medium
Data Scientist

Traverse an Org Chart by Level

You are given an organization's reporting structure as a flat list of employee-manager relationships. Exactly one employee is the root (the CEO) and h...

Coding & AlgorithmsTreesStacks & Queues
27
1
244 people solved
Feb 25, 2026
Deshaw logo
DeshawSnowflakeSalesforce

Also asked at Salesforce, Expedia, Google, Oracle, Amazon, Microsoft, Wells Fargo, Noon

Easy
Software Engineer

Count All-Vowel Substrings Containing Every Vowel

Problem Given a lowercase English string word, count its nonempty contiguous substrings that contain only vowels and include each of a, e, i, o and u ...

Coding & AlgorithmsArrays & Strings
1
0
14 people solved
Duolingo logo
Duolingo
Medium
Product Manager

Design an AI Speaking Partner for Duolingo: Roleplay Chats with Live Corrections

You are a product manager at Duolingo. How would you use generative AI to build conversational agents that let learners practice a language through li...

Product Design & StrategyAI Product ManagementLLM Applications
1
0
12 people solved
Jul 20, 2026
Databricks logo
Databricks
Medium
Software Engineer

Implement a sliding-window hit counter

Implement a hit counter that supports recordHit(timestamp) and getHits(pastSeconds). Use a fixed-size array to maintain a sliding time window (e.g., l...

Coding & AlgorithmsData Structure DesignArrays & Strings
37
0
255 people solved
Sep 6, 2025
Google logo
GoogleAmazonMetaMicrosoft

Also asked at Meta, Microsoft

Medium
Software Engineer

Optimal First-Player Stones With a Growing Take Limit

Problem Positive stone piles are arranged in a row. Alice starts, then players alternate taking the first X remaining whole piles, with 1 <= X <= 2*M ...

Coding & AlgorithmsDynamic Programming
1
0
9 people solved
Meta logo
Meta
Medium
Product Manager

How a Photo Message Travels in WhatsApp or Messenger: Upload, Encryption, Delivery

In a product manager interview at Meta, the interviewer tests your technical fluency with a familiar scenario: someone shares a picture in a chat app ...

System DesignTechnical Tradeoffs for PMsCryptography
1
0
10 people solved
Aug 23, 2026
Decagon logo
Decagon
Medium
Software Engineer

Compute exclusive CPU time from nested logs

You are given logs from a single-threaded CPU that runs n functions (IDs 0 to n-1). Each log entry is a string in the format: - "functionId:start:time...

Coding & AlgorithmsStacks & Queues
23
0
391 people solved
Mar 1, 2026
Google logo
GoogleLinkedInMeta

Also asked at Meta, Amazon, Bloomberg, TCS

Easy
Software Engineer

Find the Next Strictly Larger Letter with Wraparound

Problem letters is sorted in nondecreasing order. Return its smallest letter strictly after target alphabetically. If none is larger, wrap to letters[...

Coding & AlgorithmsBinary Search
1
0
14 people solved
Google logo
Google
Medium
Software Engineer Locked

Minimize Direction Violations in a Directed Road Network

Find a route through a directed road network that minimizes travel against the original edge directions. Model forward and reverse traversal costs cor...

Coding & AlgorithmsGraphs
71
5
510 people solved
Jul 5, 2026
Google logo
GoogleBloombergAmazon

Also asked at Amazon, Microsoft, Meta

Medium
Software Engineer

Exchange Two Symmetric List Values

Problem Given linked-list head and one-based position k, exchange the values stored in the kth node from the start and the kth node from the end. Retu...

Coding & AlgorithmsLinked ListsTwo Pointers & Sliding Window
0
0
10 people solved
Roblox logo
Roblox
Hard
Software Engineer

Design game matchmaking and waiting queue

Design a scalable game matchmaking and waiting-queue system You are designing the matchmaking system for a large real-time multiplayer game (think of ...

System DesignMultiplayer Game SystemsDistributed Coordination
98
2
682 people solved
Jul 15, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Evaluate a New Ads-Ranking Algorithm

Design an experiment for a new ads-ranking algorithm, including the primary metric, randomization unit, advertiser budget interference, and launch gua...

Analytics & Experimentation
5
0
116 people solved
May 22, 2026
Google logo
GoogleMetaMicrosoft

Also asked at Microsoft, Bloomberg, Amazon, TCS

Medium
Software Engineer

Most Vowels in a Fixed-Length Substring

Problem Return the largest number of vowel occurrences in any contiguous length-k substring of s. The vowels are exactly a,e,i,o,u. `cpp class Solutio...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
1
0
9 people solved
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