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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
404
Companies
980
Updated
11.12.2026
404 Questions 980 Companies11.12.2026
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
Anthropic logo
Anthropic
Medium
Software Engineer

Convert stack samples to trace events

Question Implement convertToTrace(samples) that, given a chronologically ordered vector of stack samples (each sample contains a timestamp and a call-...

Coding & AlgorithmsStacks & QueuesSimulation & State Machines
233
4
1523 people solved
Jul 29, 2025
Meta logo
Meta
Medium
Software Engineer

Canonicalize an Absolute Unix-Style Path With Dot and Double-Dot Segments

Given an absolute path in a Unix-style file system, return its simplified canonical form. Function Signature `python def simplify_path(path: str) -> s...

Coding & AlgorithmsStacks & QueuesArrays & Strings
5
0
49 people solved
Sep 14, 2026
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Maximum of Fixed-Window Minimums

Find the maximum among all fixed-length sliding-window minima, handling negative values, duplicates, and boundary window sizes with a linear-time appr...

Coding & AlgorithmsTwo Pointers & Sliding WindowStacks & Queues
11
0
103 people solved
Sep 9, 2026
Figma logo
Figma
Medium
Software Engineer Locked

Validate a Balanced INDENT and DEDENT Token Stream

Validate whether an INDENT and DEDENT token stream remains balanced at every prefix and closes all open levels at the end. This compact problem tests ...

Coding & AlgorithmsStacks & Queues
23
1
220 people solved
Jul 21, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a Key-Value Store with Hit Counting

Design an in-memory key-value store whose successful reads feed a configurable per-key hit counter over time windows. Clarify counting semantics, then...

Software Engineering FundamentalsData Structure DesignStacks & Queues
18
0
210 people solved
Jul 25, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Count Islands and Return the Largest Island Size

Count four-connected islands and find the largest island using DFS or BFS, with correct visited-state handling and all-water behavior.

Coding & AlgorithmsGrids & MatricesStacks & Queues
3
0
25 people solved
Sep 11, 2026
TypeSafe AI logo
TypeSafe AI
Easy
Software Engineer

Hand-Write a Stack-Based Interpreter That Evaluates Arithmetic Formulas

Design and hand-write a stack interpreter: a small program that uses a stack to carry out basic calculator operations and evaluate the numeric value o...

Software Engineering FundamentalsParsing & InterpretersStacks & Queues
0
0
1 people solved
Nov 7, 2026
Infosys logo
InfosysVisaServiceNow

Also asked at ServiceNow, Google, Meta, Microsoft, Amazon, IBM, Expedia, Microstrategy

Medium
Software Engineer

Fewest Arbitrary Bracket Swaps

Problem The even-length string s contains equally many [ and ] characters. One operation swaps the characters at any two indices. Return the smallest ...

Coding & AlgorithmsGreedyStacks & Queues
1
0
11 people solved
Socure logo
Socure
Hard
Software Engineer Locked

Implement a Concurrent Payment Queue with Visibility Timeouts

Implement an in-memory payment queue with atomic receives, visibility timeouts, ACK races, stale-callback protection, and idempotent payment processin...

Software Engineering FundamentalsConcurrencyData Structure Design
8
0
58 people solved
Sep 5, 2026
Uber logo
Uber
Medium
Software Engineer

Solve 12 coding interview problems

Below are multiple independent coding problems. --- Problem 1: Reduce an integer to 0 with \(\pm 2^i\) You are given a positive integer \(n\). In one ...

Coding & AlgorithmsDynamic ProgrammingBinary Search
372
0
3900 people solved
Feb 12, 2026
Reddit logo
Reddit
Medium
Software Engineer

Implement a sliding-window rate limiter

Problem Design and implement an in-memory rate limiter using a sliding time window. You are given a stream of requests. Each request has: - key (e.g.,...

Coding & AlgorithmsRate LimitingData Structure Design
27
0
306 people solved
Nov 10, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Simplify an Arithmetic Expression Tree with Constant Folding and Identities

Given the abstract syntax tree of an arithmetic expression as a binary tree, write a traversal that returns an equivalent simplified tree using consta...

Software Engineering FundamentalsTreesParsing & Interpreters
3
0
44 people solved
Sep 5, 2026
Vercel logo
Vercel
Medium
Software Engineer Locked

Count Hits in the Past Five Minutes

Implement a five-minute hit counter with ordered timestamped operations, repeated hits, and an explicit 300-second expiration boundary.

Coding & AlgorithmsData Structure DesignStacks & Queues
10
0
85 people solved
Sep 12, 2026
Databricks logo
Databricks
Medium
Software Engineer

Implement a rate-limited hit counter

You are designing a hit counter that records the number of hits received in the past 5 minutes. Implement a class HitCounter with the following method...

Coding & AlgorithmsData Structure Design
34
0
575 people solved
Dec 8, 2025
Rubrik logo
Rubrik
Hard
Software Engineer

Validate BFS order queries on a tree

You are given an undirected tree described by two equal-length arrays u and v (each of length n-1). For every index i, there is an undirected edge bet...

Coding & AlgorithmsTrees
24
0
198 people solved
Feb 12, 2026
Amazon logo
AmazonAdobeApple

Also asked at Apple, Meta, LinkedIn, Google, OpenAI, Mixpanel, Walmart Labs, Deshaw, Warnermedia, Yahoo, Aurora

Medium
Software Engineer

Iterate NestedInteger Contents in Their Original Flattened Order

Problem Implement NestedIterator(vector<NestedInteger>&), next() and hasNext(). Flatten nested lists in left-to-right depth-first order. The caller re...

Coding & AlgorithmsData Structure DesignStacks & Queues
1
0
8 people solved
Amazon logo
AmazonGoogleUber

Also asked at Uber, Meta, DocuSign, Cleartrip

Hard
Software Engineer

Fewest Arrow Changes Creating a Corner-to-Corner Path

Problem Each grid cell has an arrow:1 right,2 left,3 down,4 up. Some arrows may point outside the grid. Starting at the top-left, follow arrows to the...

Coding & AlgorithmsGraphsGrids & Matrices
1
0
11 people solved
Microsoft logo
MicrosoftArcesiumExpedia
Medium
Software Engineer

Maximize Total Height in a Mountain of Towers

Maximize Total Height in a Mountain of Towers You are given a 0-indexed array maxHeights of n integers. Choose an integer height heights[i] for the to...

Coding & AlgorithmsStacks & QueuesDynamic Programming
0
0
12 people solved
Amazon logo
AmazonGoogleBloomberg

Also asked at Bloomberg, Meta, Microsoft, Yandex, LinkedIn, Infosys, VK

Easy
Software Engineer

Check Reflected Binary-Tree Structure and Values

Problem Determine whether a binary tree is symmetric about its root: its left and right sides must be mirror images with equal values in corresponding...

Coding & AlgorithmsTrees
1
0
12 people solved
Palantir logo
PalantirAmplitudeAtlassian

Also asked at Atlassian, Amazon, Google, Microsoft, Uber, Salesforce, IXL Learning, WeRide

Medium
Software EngineerSenior+

Simulate a Growing Snake on a Grid and Report the Score After Every Move

A snake moves on a rectangular board with height rows and width columns. Cells are written (row, col), with (0, 0) in the top-left corner. The snake s...

Coding & AlgorithmsSimulation & State MachinesStacks & Queues
2
0
41 people solved
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