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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
509
Companies
980
Updated
11.08.2026
509 Questions 980 Companies11.08.2026
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
Amazon logo
Amazon
Hard
Software Engineer

Cheapest Grid Path with a Turn Limit

Cheapest Grid Path with a Turn Limit You are given a rectangular matrix grid and an integer k. The value in a cell is the cost of visiting it. Start a...

Coding & AlgorithmsDynamic ProgrammingGraphs
0
0
8 people solved
Turing logo
Turing
Medium
Software Engineer

Count permutations with exactly n inversions

You are given two integers m and n. Consider all permutations of the array [1, 2, ..., m] (each number from 1 to m appears exactly once). A permutatio...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory
12
0
143 people solved
Nov 24, 2025
Meta logo
Meta
Medium
Software EngineerSenior+

Longest Balanced Substring in a String of Parentheses

Reported from a Meta software engineering coding round. You are given a string s that contains only the characters ( and ). A string is balanced if it...

Coding & AlgorithmsStacks & QueuesDynamic Programming
1
0
14 people solved
Mar 26, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Find Path Between Fibonacci Tree Nodes

This question evaluates a candidate's ability to reason about recursive tree structures, map preorder indices to positions in a recursively defined Fi...

Coding & AlgorithmsTreesDynamic Programming
20
0
155 people solved
Feb 13, 2026
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Meta, Bloomberg

Hard
Software Engineer

Build a Shortest String Containing Two Subsequences

Problem Return a shortest string containing both str1 and str2 as subsequences. A subsequence keeps character order while allowing deletions. If sever...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
8 people solved
Uber logo
Uber
Medium
Software Engineer

Solve Balanced Permutations and Tree Reversals

You have 90 minutes to solve the following two independent coding problems. Problem 1: Balanced Prefix Values in a Permutation You are given a permuta...

Coding & AlgorithmsTreesArrays & Strings
15
0
157 people solved
Apr 3, 2026
Google logo
GoogleAmazonMeta

Also asked at Meta, Microsoft, Bloomberg

Hard
Software Engineer

Count Arrays with Zigzag Comparisons

Problem Given integers n, l, and r, count arrays of length n satisfying all three conditions: - Every element is an integer in the inclusive range [l,...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
0
0
10 people solved
Grammarly logo
GrammarlyMorgan Stanley
Medium
Software Engineer

Fewest Substrings with Equal Character Frequencies

Fewest Substrings with Equal Character Frequencies You are given a lowercase English string s. Partition the entire string into one or more nonempty, ...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
11 people solved
Optiver logo
Optiver
Hard
Quantitative Trader

Optimize interval-scoring strategy

Optimize interval-scoring strategy Five-Round Interval-Estimation Game: Optimal Intervals and Risk Allocation You play five independent rounds. In rou...

Statistics & MathProbabilityDynamic Programming
27
0
254 people solved
Aug 7, 2025
Chalk logo
Chalk
Medium
Software Engineer Locked

Compute rainwater accumulation on a height grid

This question evaluates understanding of grid-based graph traversal, flow simulation to local minima, and the ability to reason about state propagatio...

Coding & AlgorithmsGrids & Matrices
31
0
507 people solved
Feb 11, 2026
Google logo
Google
Hard
Software Engineer

Count same-color squares in a character grid

You are given a 2D grid (matrix) of characters. Each character represents a color: cells with the same character are considered the same color. Formal...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
23
3
280 people solved
Nov 22, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Implement KV store and plan type conversions

Part 1 — Versioned key-value store: Implement a data structure with set(key, value, t) and get_at(key, t) that returns the value for key whose timesta...

Coding & AlgorithmsData Structure DesignGraphs
68
0
529 people solved
Sep 6, 2025
Jane Street logo
Jane Street
Easy
Quantitative TraderIntern

Four Fair Coins: Expected Payoff and Pricing Two Magic Wands

You play the following game: four fair coins are tossed at the same time. For every coin that lands heads, you are paid \$1. The interviewer walks you...

Machine LearningProbabilityPuzzles & Brainteasers
13
1
166 people solved
Sep 11, 2025
Amazon logo
Amazon
Medium
Software Engineer

Find the Longest Wiggle Subsequence Length

Find the Longest Wiggle Subsequence Length A wiggle sequence has successive differences that are nonzero and alternate between positive and negative. ...

Coding & AlgorithmsGreedyDynamic Programming
0
0
8 people solved
Teradata logo
Teradata
Hard
Software Engineer

Total Power Across All Subsequences

Total Power Across All Subsequences You are given an integer array nums and a positive integer k. The power of an array is the number of its subsequen...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory
0
0
6 people solved
Google logo
GoogleMeta
Medium
Software Engineer

Best Alternating Sum of an Ordered Selection

Problem Choose a subsequence from the positive integers in nums while preserving their original order. Reindex the selected entries from zero, add tho...

Coding & AlgorithmsDynamic ProgrammingGreedy
0
0
7 people solved
Amazon logo
Amazon
Hard
Software Engineer Locked

Minimize time for two handlers

This question evaluates algorithmic optimization skills and stateful scheduling reasoning, focusing on task assignment trade-offs and cumulative cost ...

Coding & AlgorithmsDynamic Programming
9
0
120 people solved
Apr 7, 2026
Microsoft logo
Microsoft
Easy
Software Engineer

Solve four classic algorithm problems

You are given four independent coding tasks. For each task, implement the required function. --- Problem 1: Zigzag level-order traversal of a binary t...

Coding & AlgorithmsDynamic ProgrammingTrees
33
0
268 people solved
Nov 30, 2025
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Deshaw, Meta

Hard
Software Engineer

Minimize the Cost of Merging Exactly K Adjacent Piles at a Time

Problem Piles in stones remain in row order. Each move merges exactly k consecutive current piles into one and costs their combined stone count. Retur...

Coding & AlgorithmsDynamic Programming
0
0
6 people solved
Google logo
GoogleAmazon
Hard
Software Engineer

Score a Grid After Coloring Column Prefixes

Score a Grid After Coloring Column Prefixes Problem You are given an n x n integer matrix grid. Every cell is initially white. In one operation, choos...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
1
0
8 people solved
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