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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
154
Companies
980
Updated
11.05.2026
154 Questions 980 Companies11.05.2026
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
Google logo
Google
Hard
Software Engineer

Use the Fewest Fixed-Length Bit Flips to Make Every Bit One

Problem A move flips every bit in a contiguous length-k window of binary nums. Return the minimum moves needed to make all bits1, or -1 if impossible....

Coding & AlgorithmsGreedyBit Manipulation
0
0
10 people solved
Citadel logo
Citadel
Medium
Software EngineerIntern

Simulate 2048 and pack board into uint64

Problem: 2048 move simulation + board compression You are implementing part of the 2048 game on a fixed 4×4 grid. Part A — Simulate a move Given a 4×4...

Coding & AlgorithmsSimulation & State MachinesBit Manipulation
36
0
440 people solved
Feb 11, 2026
Google logo
GoogleBloomberg
Easy
Software Engineer

Count Words Using Only Permitted Letters

Problem allowed lists distinct lowercase letters. Count the entries of words whose every character appears in allowed. Repeated letters inside a word ...

Coding & AlgorithmsArrays & Strings
1
0
9 people solved
Snowflake logo
Snowflake
Medium
Software Engineer

Decide Whether an Undirected Graph Can Be Colored with Three Colors

Given an undirected graph, decide whether every node can be given one of three colors so that no edge connects two nodes of the same color. Function S...

Coding & AlgorithmsGraphsBacktracking & Recursion
1
0
30 people solved
Apr 28, 2026
Groww logo
Groww
Hard
Software Engineer

Pair Values with Increasing GCD Multipliers

Problem The positive array nums has length 2n. Perform exactly n operations. On operation i, numbered from one, choose and remove two remaining entrie...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory
1
0
10 people solved
DRW logo
DRW
Medium
Software EngineerIntern

Solve three algorithmic OA problems

This is an online assessment (Codility-style, 150 minutes) consisting of three independent coding problems. Solve each one separately; they do not sha...

Coding & AlgorithmsBacktracking & RecursionBit Manipulation
56
0
469 people solved
Oct 8, 2025
Google logo
Google
Medium
Software Engineer

Count Adjacent Substring Pairs With the Same Set of Distinct Letters

Given a string s of lowercase English letters, two non-empty strings form a magical pair when they contain exactly the same set of distinct characters...

Coding & AlgorithmsArrays & Strings
1
0
9 people solved
Jul 20, 2026
Google logo
Google
Medium
Software Engineer

Maintain streaming median and loosemedian

Maintain streaming median and loosemedian Design a data structure for an online stream of positive integers supporting insert (x). After each insertio...

Coding & AlgorithmsHeaps & Priority Queues
24
0
170 people solved
Aug 8, 2025
Google logo
Google
Hard
Software Engineer

Count Positive Numbers with No Repeated Decimal Digit

Problem Return the number of positive integers in the inclusive interval [1, n] whose decimal digits are all distinct. Use each integer's usual decima...

Coding & AlgorithmsMath & Number TheoryBit Manipulation
1
0
10 people solved
Snowflake logo
Snowflake
Medium
Software Engineer

Effective Permissions in an Inheritance DAG with Allow and Deny Lists

Permissions are inherited along the edges of a directed acyclic graph. Each node, such as a group, a folder or a resource, has its own allow list and ...

Software Engineering FundamentalsGraphsAuthentication & Authorization
2
0
19 people solved
Apr 28, 2026
Google logo
GoogleUberRoku

Also asked at Roku, Adobe, Airbnb, PhonePe

Hard
Software Engineer

Find the Fewest Grid Moves Needed to Collect Every Key

Problem In grid, @ is the single start, . is empty floor, and # is a wall. Lowercase letters are keys and their uppercase versions are locks. Move one...

Coding & AlgorithmsGrids & MatricesGraphs
0
0
7 people solved
Databricks logo
Databricks
Medium
Software Engineer

Implement CIDR firewall matcher

Implement CIDR firewall matcher Firewall Rule Matcher for IPv4 CIDR Rules Context and Assumptions You are to design and implement a firewall rule matc...

Coding & AlgorithmsData Structure Design
76
0
443 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Maximum Binary XOR After Rearranging One String

Problem You are given equal-length binary strings s and t. You may rearrange the characters of t arbitrarily, but s must stay in its original order. R...

Coding & AlgorithmsBit ManipulationGreedy
0
0
4 people solved
Amazon logo
AmazonGoogleBloomberg
Medium
Software Engineer

Minimum Moves to Collect Classroom Litter

Minimum Moves to Collect Classroom Litter You are given a rectangular grid classroom and a positive integer energy. The grid contains: - S: the starti...

Coding & AlgorithmsGrids & MatricesGraphs
0
0
8 people solved
Google logo
GoogleInfosys
Medium
Software Engineer

Longest Subsequence with a Nonzero XOR

Problem Given an integer array nums, return the greatest length of a subsequence whose bitwise XOR is nonzero. If no such subsequence exists, return 0...

Coding & AlgorithmsBit ManipulationArrays & Strings
0
0
11 people solved
Amazon logo
AmazonGoogle
Easy
Software Engineer

XOR the Arithmetic-Step Array

Problem Define n values nums[i]=start+2*i for zero-based indices 0..n-1. Return their bitwise XOR. `cpp class Solution { public: int xorOperation(...

Coding & AlgorithmsBit Manipulation
0
0
8 people solved
Amazon logo
Amazon
Medium
Software Engineer

Add, Remove, and Find Values in a Bounded Integer Universe

Implement a set that supports adding, removing, and searching integer values from a known bounded range. Implement bounded_set(limit: int, operations:...

Coding & AlgorithmsData Structure DesignArrays & Strings
2
0
35 people solved
Apr 26, 2026
Apple logo
AppleMetaBloomberg
Medium
Software Engineer

Sum the Bit Differences across All Array Pairs

Sum the Bit Differences across All Array Pairs The Hamming distance between two nonnegative integers is the number of bit positions at which their bin...

Coding & AlgorithmsBit ManipulationMath & Number Theory
0
0
7 people solved
Google logo
GoogleMicrosoftMeesho
Medium
Software Engineer

Count Distinct XOR Values from Index Triples

Problem You are given an array nums of length n that is a permutation of the integers 1 through n. For every index triple satisfying 0 <= i <= j <= k ...

Coding & AlgorithmsBit ManipulationMath & Number Theory
0
0
9 people solved
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Fewest Moves to Collect Every Key in a Grid With Locked Cells

You are given a rectangular grid as a list of equal-length strings. Each character is one of: - '@': the starting cell (there is exactly one); apart f...

Coding & AlgorithmsGraphsGrids & Matrices
1
0
14 people solved
Jun 16, 2026
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