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

NVIDIA

Medium

Software Engineer Locked

Merge Sorted Arrays, Then Scale to Huge Files and a Global Sort of N Files

Merge two sorted integer arrays, then scale the same task to two sorted files that exceed memory and to N large files that must be globally sorted and...

Software Engineering FundamentalsSortingPartitioning & Consistent Hashing

Longest Non-Decreasing Subarray After One Replacement

Given an integer array nums, return the maximum length of a contiguous non-decreasing subarray obtainable after changing at most one array element to ...

Coding & AlgorithmsArrays & StringsDynamic Programming

Sliding-Window Mean After Removing the Largest K Values

For every contiguous window of a fixed size, remove the largest k values by multiplicity and compute the mean of the remaining values. Process sliding...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design

282 people solved

Sep 1, 2026

Check Whether a Letters-and-Numbers Abbreviation Matches a Word

A word can be abbreviated by replacing some of its non-empty substrings with their lengths, written in decimal. For example, "abbreviation" can be wri...

Coding & AlgorithmsTwo Pointers & Sliding Window

Keep at Most Two Copies in a Sorted Array Prefix

Problem The integer array nums is sorted in nondecreasing order. Modify it in place to retain at most two occurrences of each value, preserving their ...

Coding & AlgorithmsTwo Pointers & Sliding Window

12 people solved

Waymo

Medium

Software Engineer Locked

2D Max Pooling That Also Returns the Coordinates of Each Window Maximum

Implement 2D max pooling with a k-by-k window and a stride, and for each window also return the row and column of its maximum, breaking ties by smalle...

Coding & AlgorithmsGrids & Matrices

Software EngineerIntern

Solve four coding problems

The interview included four independent coding problems: 1. Longest all-healthy service streak You are given the daily health-check results for mul...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window

Implement 2048 Board Tilts in Four Directions with Merging and Game-Over Detection

You are implementing the move logic of the sliding-tile game 2048. The board is a 4 x 4 grid. Each cell is either empty, written 0, or holds a tile wh...

Software Engineering FundamentalsSimulation & State Machines

44 people solved

Sep 30, 2026

Medium

Software Engineer Locked

Find the Node Where Two Singly Linked Lists Merge

Two singly linked lists stored in one successor array may merge at some node and share every node after it. Given both heads, return the first shared ...

Coding & AlgorithmsLinked Lists

Pick Two Trees for a Zipline That Maximizes Height Times Span

Trees stand in a straight row, one unit apart: tree i is at position i and has height heights[i]. You will install one zipline between two different t...

Coding & AlgorithmsTwo Pointers & Sliding Window

Quantitative Researcher

Total Rainwater Trapped Above an Elevation Profile of Unit-Width Bars

An elevation profile is made of vertical bars of width 1 standing side by side on flat ground. After heavy rain, water collects in the dips between ba...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Move Zeros In Place while Preserving Nonzero Order

Problem Modify nums so all nonzero values stay in their original relative order and all zeros follow them. Do this in place without copying the array....

Coding & AlgorithmsTwo Pointers & Sliding Window

16 people solved

OpenAI

Hard

Software Engineer Locked

Aggregate Recent Message Events And Active Chats

Prepare for a stateful event aggregation coding prompt over chat events and active chats in a rolling five-minute window. The question is useful for d...

Coding & AlgorithmsData Structure Design

101

681 people solved

Jun 5, 2026

AmazonGoogleBloomberg

Hard

Software Engineer

Measure Rainwater Held Between Bars

Problem The array heights describes a row of adjacent vertical bars on level ground. Bar i has height heights[i], and every bar is one unit wide. Retu...

Coding & AlgorithmsTwo Pointers & Sliding WindowDynamic Programming

Enumerate Disjoint Pairs of Target-Sum Subrectangles

Given a two-dimensional array of nonnegative values and an integer k, find every unordered pair of nonempty axis-aligned subrectangles such that each ...

Coding & AlgorithmsGrids & MatricesArrays & Strings

Find a Repeated Value without Modifying the Array

Problem nums has n+1 entries drawn from 1..n. Precisely one value occurs more than once; it may occur more than twice. Return that value without chang...

Coding & AlgorithmsTwo Pointers & Sliding WindowMath & Number Theory

Detect a Permuted Pattern in a Contiguous Window

Problem Return whether s2 contains a contiguous substring that is a permutation of s1. Every character occurrence of s1 must be used once in that wind...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

18 people solved

OpenAI

Hard

Software Engineer Locked

Count Events in a Trailing 15-Minute Window with a Fixed-Size Ring Buffer

Implement an event counter that returns how many events occurred in the trailing 15 minutes, using a fixed-size ring buffer of per-second buckets so m...

Software Engineering FundamentalsData Structure Design

In-Memory Per-Second API Rate Limiter: Accept or Reject Each Request

An API endpoint is protected by an in-memory rate limiter. The limiter is created with one value, max_per_second, the largest number of requests it le...

Coding & AlgorithmsRate LimitingData Structure Design

Reorder a String by Alternating Its Front and Back Characters

Given a string s, build a new string by taking characters alternately from the front and the back of s: the first character, then the last character, ...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

80 people solved

Sep 10, 2026

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Tech Interview Questions

Merge Sorted Arrays, Then Scale to Huge Files and a Global Sort of N Files

Longest Non-Decreasing Subarray After One Replacement

Sliding-Window Mean After Removing the Largest K Values

Check Whether a Letters-and-Numbers Abbreviation Matches a Word

Keep at Most Two Copies in a Sorted Array Prefix

2D Max Pooling That Also Returns the Coordinates of Each Window Maximum

Solve four coding problems

Implement 2048 Board Tilts in Four Directions with Merging and Game-Over Detection

Find the Node Where Two Singly Linked Lists Merge

Pick Two Trees for a Zipline That Maximizes Height Times Span

Total Rainwater Trapped Above an Elevation Profile of Unit-Width Bars

Move Zeros In Place while Preserving Nonzero Order

Aggregate Recent Message Events And Active Chats

Measure Rainwater Held Between Bars

Enumerate Disjoint Pairs of Target-Sum Subrectangles

Find a Repeated Value without Modifying the Array

Detect a Permuted Pattern in a Contiguous Window

Count Events in a Trailing 15-Minute Window with a Fixed-Size Ring Buffer

In-Memory Per-Second API Rate Limiter: Accept or Reject Each Request

Reorder a String by Alternating Its Front and Back Characters

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