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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
333
Companies
980
Updated
11.06.2026
333 Questions 980 Companies11.06.2026
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
Databricks logo
Databricks
Medium
Software EngineerIntern

Design Tic-Tac-Toe and QPS data structures

You are given two independent coding problems that focus on data structure and API design. --- Problem 1: Generalized Tic-Tac-Toe Game with Simple AI ...

Coding & AlgorithmsData Structure DesignSimulation & State Machines
121
2
869 people solved
Nov 13, 2025
Visa logo
Visa
Medium
Software EngineerNew Grad Locked

Shortest Prefix of a Digit String That Can Build Every Permutation of a Target

Given a digit string and a list of digit targets, return for each target the length of the shortest prefix whose characters could build every permutat...

Coding & AlgorithmsArrays & Strings
12
0
90 people solved
Sep 19, 2026
MongoDB logo
MongoDBAmazonMeta

Also asked at Meta, Google, Bloomberg, Oracle, Trend Micro, UnifyApps

Medium
Software Engineer

Schedule Dry Days to Prevent Any Lake Flood

Problem Lakes 1..1000000000 start empty. A positive rains[i] fills that lake; rain on an already full lake causes a flood. On a zero day,you must choo...

Coding & AlgorithmsGreedyIntervals & Scheduling
1
0
22 people solved
Roblox logo
RobloxInfosysGoogle

Also asked at Google, PhonePe, Uber, Cohesity

Hard
Software Engineer

Count Inclusive Bloom Intervals at Each Visitor Time

Problem Each flower in flowers blooms throughout its inclusive interval [start, end]. For each arrival time in people, count how many flowers are bloo...

Coding & AlgorithmsIntervals & SchedulingBinary Search
1
0
31 people solved
Amazon logo
AmazonMetaMicrosoft

Also asked at Microsoft, Google, Bloomberg, Goldman Sachs, Oracle, Motive, Apple, TikTok, PayPal, Zomato

Medium
Software Engineer

Search a Matrix with Ordered Rows and Columns

Search a Matrix with Ordered Rows and Columns Given a rectangular integer matrix and an integer target, return whether the matrix contains the target....

Coding & AlgorithmsGrids & Matrices
1
0
13 people solved
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Read Current and Historical Field Values with Expiration

Process key-and-field database writes, TTL expiration, deletion, and historical reads while preserving past values without rolling back current state.

Coding & AlgorithmsData Structure DesignBinary Search
6
0
103 people solved
Sep 1, 2026
Quora logo
Quora
Easy
Software EngineerNew Grad

Count meetings in progress at a time, then support editing meeting times

You are given a set of meetings, each with a start time and an end time. Answer how many meetings are in progress at a given moment. In the follow-up,...

Software Engineering FundamentalsIntervals & SchedulingData Structure Design
0
0
4 people solved
Nov 5, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Follow Graph with Cheap Snapshots and Top-K Follow Recommendations

Build a one-directional follow graph that supports cheap snapshots and queries against past snapshots, then recommend the top k accounts a user should...

Software Engineering FundamentalsData Structure DesignGraphs
7
0
87 people solved
Sep 20, 2026
Attentive logo
Attentive
Medium
Software EngineerSenior+

Return Log Entries Within an Inclusive Time Range From a Sorted Log

You are given a log that has already been loaded into memory as a list of entries. Each entry is a pair (timestamp, message), where timestamp is an in...

Coding & AlgorithmsBinary Search
8
0
63 people solved
Sep 24, 2026
ByteDance logo
ByteDance
Medium
Machine Learning Engineer

Maximize total catch over K hours from ponds whose yield drops after each hour

There are N fishing ponds. M[i] is the number of fish you catch if you spend the next hour fishing at pond i. You have K hours in total. Each hour you...

Coding & AlgorithmsBinary SearchGreedy
3
0
51 people solved
Oct 9, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Meta, Microsoft, Infosys, TCS, Apple, Purestorage

Easy
Software Engineer

Find an Index by Halving a Sorted Range

Problem Search the strictly increasing array nums for target. Return its zero-based index if present, otherwise -1. The search must take O(log n) time...

Coding & AlgorithmsBinary Search
1
0
19 people solved
Walmart Labs logo
Walmart Labs
Hard
Software Engineer

Find the Single Repeated Value Among n + 1 Integers Drawn from 1 to n

You are given an array nums of n + 1 integers, each between 1 and n inclusive. Because there are more entries than possible values, some value must ap...

Coding & AlgorithmsLinked ListsBinary Search
2
0
36 people solved
Oct 1, 2026
xAI logo
xAI
Medium
Machine Learning EngineerNew Grad Locked

Find All Faulty GPU Nodes with Parallel Group Tests That Cannot Share Nodes

An algorithm design question about finding every faulty GPU node when the only tool is a group test that fails if any node in the set is bad. Tests ne...

Software Engineering FundamentalsMath & Number Theory
4
0
77 people solved
Sep 5, 2026
IBM logo
IBM
Easy
Software Engineer Locked

Calculate Revenue from Highest-Inventory VM Sales

Sell each VM unit at its current inventory count, always choose a type with maximum inventory, and compute total revenue safely.

Coding & AlgorithmsHeaps & Priority QueuesGreedy
20
0
134 people solved
Sep 15, 2026
Google logo
GoogleMetaAmazon

Also asked at Amazon, Bloomberg, Microsoft, Apple, Whatnot

Easy
Software Engineer

Find the Earliest Failing Version

Find the Earliest Failing Version Versions are numbered from 1 through n. There is a first failing version: every earlier version passes, and that ver...

Coding & AlgorithmsBinary Search
1
0
16 people solved
Uber logo
UberSnapchatGoogleAmazon

Also asked at Google, Amazon

Hard
Software Engineer

Wait as Long as Possible before Escaping a Spreading Fire

Problem You are given a rectangular grid in which 0 is grass, 1 is fire, and 2 is a wall. You start at the top-left grass cell and want to reach the b...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
3
0
23 people solved
Amazon logo
Amazon
Medium
Software Engineer

Add One Source to Minimize Grid Inconvenience

Add One Source to Minimize Grid Inconvenience Implement min_max_inconvenience(grid). grid is a non-empty rectangular matrix containing 0 and 1. A cell...

Coding & AlgorithmsGrids & MatricesGraphs
21
0
254 people solved
Jul 9, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Check Fixed Board Placements Against Number-Line Blockers

Check fixed board intervals against sorted number-line blockers, with explicit endpoint rules, duplicate blockers, and independent placement queries.

Coding & AlgorithmsIntervals & SchedulingBinary Search
13
0
106 people solved
Sep 7, 2026
Optiver logo
Optiver
Medium
Software Engineer Locked

Fastest Rolling One-Kilometer Average Speed from 5-Second Distance Samples

Given the meters a runner covers in each 5-second interval, find the fastest average speed over a rolling one-kilometer stretch, defined as the shorte...

Coding & AlgorithmsTwo Pointers & Sliding Window
8
0
110 people solved
Sep 13, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Choose k Non-Adjacent Servers to Minimize the Largest Chosen Value

A row of n servers is numbered 0 to n - 1 from left to right, and server i has an integer value values[i]. Choose exactly k servers such that no two c...

Coding & AlgorithmsBinary SearchGreedy
6
0
60 people solved
Aug 2, 2026
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