Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

1.5k

Companies

980

Updated

11.12.2026

1.5k 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

DRW

Easy

Software EngineerIntern

Fewest Expenses to Defer to Year End So the Running Balance Never Goes Negative

A company's transactions for one year are given in chronological order as an array A: a positive value is income and a negative value is an expense. T...

Coding & AlgorithmsGreedyHeaps & Priority Queues

String Left Before the Final Round of Removing Each Letter's First Occurrence

You are given a string s of lowercase English letters. One round of the following operation is applied to it again and again until the string becomes ...

Coding & AlgorithmsArrays & Strings

5 people solved

Nov 5, 2026

Capital OneCoinbaseMeta

Medium

Software Engineer

Validate Stateful Account Transactions

Problem Implement a Bank object for accounts numbered from 1 through n. The constructor receives the initial balances, with array position i holding t...

Coding & AlgorithmsData Structure DesignSimulation & State Machines

30 people solved

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

Reorder the Original Array into Strict Alternating Peaks

Problem Rearrange nums in place so nums[0]<nums[1]>nums[2]<nums[3] and so on. The source guarantees a valid rearrangement exists and accepts different...

Coding & AlgorithmsSortingArrays & Strings

19 people solved

Airbnb

Medium

Machine Learning EngineerSenior+ Locked

Redact Document Phrases with Simultaneous Replacement

Redact document phrases with a replacement map, whole-word matching, longest-match overlap rules, and one-pass replacement of original text.

Coding & AlgorithmsArrays & Strings

Software Engineer Locked

In-Place Rectangle Copy Within a 2D Array Using O(1) Extra Memory

Copy a rectangular block of a 2D array to another position in the same array, in place with O(1) extra memory, where the source and destination blocks...

Coding & AlgorithmsGrids & Matrices

Implement 2048-Style Tile Slides and Merges for All Four Board Directions

Implement the move logic of a sliding-tile game played on a square board of numbered tiles. A move pushes every tile as far as it can go in one direct...

Software Engineering FundamentalsSimulation & State MachinesGrids & Matrices

Split a Digit String into All Strictly Increasing Number Sequences

Given a string s of decimal digits, cut it into one or more contiguous pieces and read each piece as a decimal integer. Return every way of cutting s ...

Coding & AlgorithmsBacktracking & Recursion

Precompute Nearest Target Positions and Define Streaming Answers

An array contains characters such as x, y, and z. Design a representation that can answer nearest-z queries for relevant positions, then explain how y...

Software Engineering FundamentalsArrays & Strings

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

8 people solved

Oct 20, 2026

MicrosoftAmazonGoogle

Easy

Software Engineer

Reverse Characters Inside Each Sentence Word

Problem Reverse the characters of every word in s while keeping the words in their original order and every separating space in place. Printable ASCII...

Coding & AlgorithmsArrays & Strings

29 people solved

Harvey

Hard

Software Engineer Locked

Merge Exact-Word Highlights and Rank Their Citations

Highlight exact whole-word source phrases in text, merge overlapping regions, and attach distinct citations in the required global ranking order. Hand...

Coding & AlgorithmsIntervals & Scheduling

Refactor a Shopping Cart to Print Grouped, Promoted, Sorted Receipts

This object-oriented coding exercise has a 30-minute time box and starts from existing code. A ShoppingCart class keeps the items a customer has scann...

Software Engineering FundamentalsLow-Level Design (OOP)Code Quality & Maintainability

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

Length of the Longest Contiguous Subarray Summing to a Target

Given an integer array nums and an integer k, return the length of the longest contiguous subarray whose elements sum to exactly k. If no such subarra...

Coding & AlgorithmsArrays & Strings

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

Software Engineer Locked

Sort a String's Characters by a Given Character Order

Rearrange the characters of a target string so they follow the order given by a second string, placing characters not in that order at the end in thei...

Coding & AlgorithmsSortingArrays & Strings

151 people solved

Sep 10, 2026

Medium

Software Engineer Locked

Generate All Distinct Permutations of a List with Duplicate Values

Given a list of up to eight integers that may contain duplicates, return every distinct permutation exactly once, sorted in lexicographic order. It te...

Coding & AlgorithmsBacktracking & Recursion

90 people solved

Sep 18, 2026

Medium

Machine Learning Engineer

Sort the values of a quadratic function applied to a sorted array in linear time

You are given an integer array nums sorted in non-decreasing order and three integers a, b and c that define the function f(x) = a x^2 + b x + c. Ap...

Coding & AlgorithmsTwo Pointers & Sliding Window

49 people solved

Aug 31, 2026

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Tech Interview Questions

Fewest Expenses to Defer to Year End So the Running Balance Never Goes Negative

String Left Before the Final Round of Removing Each Letter's First Occurrence

Validate Stateful Account Transactions

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

Reorder the Original Array into Strict Alternating Peaks

Redact Document Phrases with Simultaneous Replacement

In-Place Rectangle Copy Within a 2D Array Using O(1) Extra Memory

Implement 2048-Style Tile Slides and Merges for All Four Board Directions

Split a Digit String into All Strictly Increasing Number Sequences

Precompute Nearest Target Positions and Define Streaming Answers

Enumerate Disjoint Pairs of Target-Sum Subrectangles

Reverse Characters Inside Each Sentence Word

Merge Exact-Word Highlights and Rank Their Citations

Refactor a Shopping Cart to Print Grouped, Promoted, Sorted Receipts

Detect a Permuted Pattern in a Contiguous Window

Length of the Longest Contiguous Subarray Summing to a Target

Reorder a String by Alternating Its Front and Back Characters

Sort a String's Characters by a Given Character Order

Generate All Distinct Permutations of a List with Duplicate Values

Sort the values of a quadratic function applied to a sorted array in linear time

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