Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

435

Companies

980

Updated

11.12.2026

435 Questions 980 Companies11.12.2026

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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Stripe

Hard

Software Engineer

Detect Trigger and Resolve Events

You are given transaction logs sorted by non-decreasing timestamp. Each log record has four fields: - timestamp: integer time in seconds - merchant_id...

Coding & AlgorithmsTwo Pointers & Sliding WindowSimulation & State Machines

Most Frequent Substring Within a Length Range and a Distinct-Letter Limit

Given a string s, consider every substring whose length is between min_length and max_length (inclusive) and that contains at most max_unique distinct...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Most Satisfied Customers With One Calm Window

Problem For minute i, customers[i] customers arrive and leave that same minute. They are satisfied exactly when grumpy[i] is 0. Once during the day, t...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

9 people solved

Voleon

Hard

Software EngineerNew Grad Locked

Solve classic coding interview problems

These problems evaluate algorithmic problem-solving skills including dynamic programming and combinatorics for the egg-dropping scenario, array manipu...

Coding & AlgorithmsDynamic ProgrammingTwo Pointers & Sliding Window

416 people solved

Feb 15, 2026

GoogleBloombergMetaAmazon

Medium

Software Engineer

Smallest Index Sequence Matching a Target with at Most One Change

Problem You are given lowercase strings word1 and word2. Choose word2.length indices from word1 in increasing order. Reading the characters at those i...

Coding & AlgorithmsGreedyTwo Pointers & Sliding Window

11 people solved

MicrosoftAmazonMeta

Medium

Software EngineerSenior+

Median of Every Fixed-Length Sliding Window in an Integer Array

Given an integer array nums and a window length k, slide a window of exactly k consecutive elements across the array from left to right, one position ...

Coding & AlgorithmsHeaps & Priority QueuesTwo Pointers & Sliding Window

29 people solved

AmazonGoogleMicrosoft

Easy

Software Engineer

Maximize the Average of an Exactly K-Length Segment

Problem Return the greatest average among contiguous subarrays of nums containing exactly k elements. Answers with calculation error less than 10^-5 a...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Rotate a Stone Box and Settle Its Contents

Problem boxGrid contains stones #, fixed obstacles *, and empty cells .. Rotate this rectangular box ninety degrees clockwise, then let stones fall do...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices

16 people solved

GoogleBloombergAmazon

Easy

Software Engineer

Construct a Permutation Matching Consecutive Increase and Decrease Signs

Problem For n = s.length, return any permutation of all integers0 through n whose adjacent comparisons match s. An I requires perm[i] < perm[i+1]; a D...

Coding & AlgorithmsGreedyTwo Pointers & Sliding Window

14 people solved

Roblox

Medium

Software Engineer Locked

Implement a Rolling-Window Rate Limiter

Implement a single-process rolling-window rate limiter where only accepted requests consume capacity. Define exact boundary behavior, expire old times...

Software Engineering FundamentalsData Structure DesignRate Limiting

Software Engineer Locked

Maximize the Product of Pair Distance and Minimum Value

Maximize the smaller of two array values times their index distance, using the Container With Most Water objective and returning one deterministic sco...

Coding & AlgorithmsTwo Pointers & Sliding WindowGreedy

Longest Subarray with Every Value Occurring at Most k Times

Longest Subarray with Every Value Occurring at Most k Times You are given an integer array nums and an integer k. A subarray is good if every value in...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Maintain a Windowed Moving Average across Stream Calls

Problem Implement MovingAverage(int size) and double next(int val). Each next call appends val and returns the mean of the most recent size values, or...

Coding & AlgorithmsData Structure DesignTwo Pointers & Sliding Window

Make a Minimum-Change Palindrome with Lexicographic Tie-Breaking

Make a Minimum-Change Palindrome with Lexicographic Tie-Breaking You are given a string s containing only lowercase English letters. One operation rep...

Coding & AlgorithmsTwo Pointers & Sliding WindowGreedy

8 people solved

Databricks

Medium

Machine Learning EngineerSenior+

Design In-Memory QPS Counter

Implement an in-memory traffic counter. You need to support two operations for each logical key, such as an endpoint, customer, or service name: - rec...

Coding & AlgorithmsData Structure DesignTwo Pointers & Sliding Window

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

9 people solved

GoogleBloombergAmazon

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

10 people solved

Solve Two Backtracking Array Problems

You will solve two independent coding problems. For each problem, first discuss edge cases, then implement a correct solution, and finally explain how...

Coding & AlgorithmsBacktracking & RecursionTwo Pointers & Sliding Window

Longest Single-Venue Execution Window Within Price-Range and Slippage Limits

You are building an audit module for a high-frequency trading platform. It receives trade-execution logs from several exchanges (venues) as an asynchr...

Coding & AlgorithmsTwo Pointers & Sliding WindowStacks & Queues

Reverse Each Binary Row and Invert Its Bits

Problem Flip the square binary image horizontally by reversing each row, then replace 0 with 1 and 1 with 0. Return the resulting image. `cpp class So...

Coding & AlgorithmsGrids & MatricesTwo Pointers & Sliding Window

13 people solved

Visa Tools

Visa Sponsors

H-1B Odds Calculator

Visa Bulletin

Tech Interview Questions

Detect Trigger and Resolve Events

Most Frequent Substring Within a Length Range and a Distinct-Letter Limit

Most Satisfied Customers With One Calm Window

Solve classic coding interview problems

Smallest Index Sequence Matching a Target with at Most One Change

Median of Every Fixed-Length Sliding Window in an Integer Array

Maximize the Average of an Exactly K-Length Segment

Rotate a Stone Box and Settle Its Contents

Construct a Permutation Matching Consecutive Increase and Decrease Signs

Implement a Rolling-Window Rate Limiter

Maximize the Product of Pair Distance and Minimum Value

Longest Subarray with Every Value Occurring at Most k Times

Maintain a Windowed Moving Average across Stream Calls

Make a Minimum-Change Palindrome with Lexicographic Tie-Breaking

Design In-Memory QPS Counter

Most Vowels in a Fixed-Length Substring

Exchange Two Symmetric List Values

Solve Two Backtracking Array Problems

Longest Single-Venue Execution Window Within Price-Range and Slippage Limits

Reverse Each Binary Row and Invert Its Bits

Choose your next challenge

Blind 75

ML System Design

System Design Interview