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

IBM

Easy

Software Engineer Locked

Find the Minimum Shared Increment on Nonadjacent Array Positions

Choose nonadjacent indices for one common nonnegative increment to make an array nondecreasing, or determine that no operation can succeed.

Coding & AlgorithmsArrays & Strings

Largest-Area Rectangle From a Point Set When Sides Need Not Be Axis-Aligned

You are given a set of distinct points with integer coordinates in the plane. Choose four of the points that are the corners of a rectangle, and retur...

Coding & AlgorithmsMath & Number Theory

Software Engineer Locked

Count Straight-Line Occurrences of a Word in a Letter Grid, Rows and Columns Only

Count how many times a target word appears in a grid of letters when read in a straight line along a row or down a column, with no turns and overlappi...

Coding & AlgorithmsGrids & Matrices

Software EngineerIntern Locked

Delete One '5' From a Digit String to Get the Largest Number

Given a digit string containing at least one 5, delete exactly one 5 so the remaining string has the largest possible numeric value, keeping any leadi...

Coding & AlgorithmsGreedyArrays & Strings

78 people solved

Sep 22, 2026

Easy

Software Engineer Locked

Merge Two N-ary Trees by Matching Node Keys

Merge two rooted n-ary trees in which every node has an integer key, combining nodes only when their keys match under matching parents. Tests recursiv...

Coding & AlgorithmsTrees

Software EngineerSenior+

Validate a Train Consist Against Hazardous-Material Placement Rules

Write the validation logic for a train's car arrangement. The inputs are a set of placement rules, the order of the cars in the train (the consist, li...

Software Engineering FundamentalsLow-Level Design (OOP)

Software Engineer Locked

Find the Earliest Pair with a Target Sum

Find two distinct array elements that sum to a target, returning the valid pair with the earliest second index and then the earliest first index, or a...

Coding & AlgorithmsArrays & Strings

Compare Normalized ASCII Phrase Symmetry

Problem Check whether a string reads the same backward after removing every non-alphanumeric character and treating uppercase letters as lowercase. Al...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Add Two Binary Digit Strings

Problem The strings first and second represent nonnegative integers in base two. Return their sum as a binary digit string, using the usual representa...

Coding & AlgorithmsMath & Number TheoryArrays & Strings

Check a One-to-One ASCII Character Substitution

Problem Determine whether two equal-length strings are isomorphic: one consistent character replacement maps s to t in order. Every occurrence of a so...

Coding & AlgorithmsArrays & Strings

Longest Overlap Between the End of One String and the Start of Another

Given two strings a and b, find the longest stretch at the end of a that is also the beginning of b. Return its length: the largest k such that the la...

Coding & AlgorithmsString Algorithms

Software Engineer Locked

Build an In-Memory File Vault with Duplicate-Name Handling

Build an in-memory file vault that creates missing directories and resolves duplicate names with the smallest available numeric suffix. Support file a...

Coding & AlgorithmsLow-Level Design (OOP)Trees

Check Whether Two Ordered Sequences Can Be Merged

You are given two arrays of integer labels, a and b. The order of labels in each array gives ordering constraints: an earlier label must appear before...

Coding & AlgorithmsGraphs

Longest Balanced Parentheses Substring

Problem You receive a string brackets whose characters are all ( or ). Return the greatest length of a contiguous substring that forms a well-formed p...

Coding & AlgorithmsStacks & QueuesArrays & Strings

Highest Average Student Score: Out-of-Memory Input, Overflow and Thread Safety in Java

Given a list of exam results, each a pair of a student's name and an integer score, return the highest average score of any student, rounded down to a...

Software Engineering FundamentalsConcurrencyArrays & Strings

Software EngineerIntern Locked

Stack Item and Category Coupons with an Eighty-Percent Cap

Apply multiplicative item and category discounts, cap unrounded savings at eighty percent, and round each final item discount once.

Coding & AlgorithmsMath & Number TheoryArrays & Strings

Backend EngineerSenior+ Locked

Process a Task List: Deduplicate, Drop Completed, Sort by Priority, and Nest Subtasks

Senior backend coding question: process a batch of scheduler tasks by removing duplicates on description and due date, dropping completed tasks, sorti...

Software Engineering FundamentalsSortingAI-Assisted Development

Find All Index Quadruples Summing to a Target Without Losing Positions

Given an integer array nums and an integer target, return every quadruple of indices (i, j, k, l) with i < j < k < l such that nums[i] + nums[j] + num...

Coding & AlgorithmsArrays & Strings

Fewest Stones Left After Merging Equal-Level Pairs

You are carrying a collection of stones, and each stone has a level, which is a positive integer. Two stones with the same level x can be merged into ...

Coding & AlgorithmsArrays & StringsBit Manipulation

Software EngineerIntern

Longest Substring in Which Every Present Letter Occurs Equally Often

A string is balanced if every letter that occurs in it occurs the same number of times. For example, "aabb", "abc" and "zzz" are balanced, while "aab"...

Coding & AlgorithmsArrays & Strings

45 people solved

Oct 1, 2026

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Tech Interview Questions

Find the Minimum Shared Increment on Nonadjacent Array Positions

Largest-Area Rectangle From a Point Set When Sides Need Not Be Axis-Aligned

Count Straight-Line Occurrences of a Word in a Letter Grid, Rows and Columns Only

Delete One '5' From a Digit String to Get the Largest Number

Merge Two N-ary Trees by Matching Node Keys

Validate a Train Consist Against Hazardous-Material Placement Rules

Find the Earliest Pair with a Target Sum

Compare Normalized ASCII Phrase Symmetry

Add Two Binary Digit Strings

Check a One-to-One ASCII Character Substitution

Longest Overlap Between the End of One String and the Start of Another

Build an In-Memory File Vault with Duplicate-Name Handling

Check Whether Two Ordered Sequences Can Be Merged

Longest Balanced Parentheses Substring

Highest Average Student Score: Out-of-Memory Input, Overflow and Thread Safety in Java

Stack Item and Category Coupons with an Eighty-Percent Cap

Process a Task List: Deduplicate, Drop Completed, Sort by Priority, and Nest Subtasks

Find All Index Quadruples Summing to a Target Without Losing Positions

Fewest Stones Left After Merging Equal-Level Pairs

Longest Substring in Which Every Present Letter Occurs Equally Often

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