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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k 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
Meta logo
Meta
Medium
Machine Learning Engineer

Implement K-Means Clustering From Scratch

Implement the k-means clustering algorithm from scratch. Given n data points in d dimensions and a number of clusters k, return a cluster label for ev...

Machine LearningML CodingUnsupervised Learning
15
0
148 people solved
Sep 25, 2026
Oracle logo
Oracle
Medium
Software Engineer

Count requests dropped by stacked 1-, 10- and 60-second rate limits

A gateway enforces three rate limits at once: at most 3 requests in any one second, at most 20 requests in any 10-second span, and at most 60 requests...

Coding & AlgorithmsTwo Pointers & Sliding WindowRate Limiting
1
0
14 people solved
Oct 29, 2026
Glean logo
Glean
Medium
Software Engineer

Find the Cell with the Smallest Total Walking Distance to All Targets Around Walls

You are given a 2D grid in which every cell is a target 'x', an empty cell '.' or a wall 'w'. Find a cell whose total walking distance to all targets ...

Coding & AlgorithmsGrids & MatricesGraphs
5
0
54 people solved
Sep 30, 2026
JPMorgan Chase logo
JPMorgan ChaseBloombergDoorDash

Also asked at DoorDash, SoFi, Microsoft, Google, Oracle, Yandex, IXL Learning

Medium
Software Engineer

Fewest Replacements Making One String an Anagram

Problem The lowercase strings s and t have equal length. One operation replaces any character of t with another character. Return the minimum operatio...

Coding & AlgorithmsArrays & Strings
4
0
43 people solved
Vanta logo
Vanta
Medium
Software Engineer Locked

Keep the First Occurrence of Every Globally Unique Line

Remove repeated lines globally while preserving first-occurrence order, exact case, spaces, and empty lines.

Coding & AlgorithmsArrays & Strings
14
0
219 people solved
Sep 12, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Design a Concurrent Image Processing Service

Design an image-processing job service that evolves safely from one worker to many concurrent processors. Define the state machine, leasing and owners...

System DesignConcurrencyDistributed Coordination
704
1
4779 people solved
Jul 8, 2026
Asana logo
Asana
Medium
Software Engineer

Pick the K Values Nearest a Target in a Sorted Integer Array

You are given an integer array arr sorted in non-decreasing order, an integer k, and a target integer x. Return the k elements of arr that are closest...

Coding & AlgorithmsBinary SearchTwo Pointers & Sliding Window
6
0
55 people solved
Sep 10, 2026
Cohere logo
Cohere
Medium
Machine Learning Engineer

Implement Greedy, Top-k and Top-p Decoding in NumPy for a Toy Language Model

You are given starter code with a toy language model class, RandomGPT. Its vocabulary has 10 tokens (IDs 0 to 9). Its forward method takes the tokens ...

Machine LearningML CodingLLM Inference & Serving
19
0
136 people solved
Sep 22, 2026
Anduril logo
AndurilAppleStripe

Also asked at Stripe, DoorDash, Niantic

Medium
Software Engineer

Expand Independent Character Choices

Problem The valid string s describes one or more words. A plain lowercase letter fixes one position; a nonnested brace group such as {x,y} offers dist...

Coding & AlgorithmsBacktracking & RecursionParsing & Interpreters
2
0
43 people solved
Jane Street logo
Jane Street
Medium
Software EngineerIntern

Write an Interpreter for a Small Language with Load, Store and Arithmetic

Implement an interpreter for a small programming language designed for the interview. The language already defines simple load and store instructions ...

Software Engineering FundamentalsParsing & InterpretersStacks & Queues
30
0
219 people solved
May 1, 2026
Google logo
Google
Medium
Software Engineer

How You Handle a Project With Unclear Scope and High Ambiguity

If a project's scope is unclear or highly ambiguous, how do you handle it in your actual work? This was the behavioral part of a software engineering ...

Behavioral & LeadershipAmbiguity & Decision Making
2
0
37 people solved
Oct 14, 2026
Google logo
GoogleMetaAmazon

Also asked at Amazon, Bloomberg, Adobe, Microsoft, TCS, Infosys, Apple, TikTok, Uber, Goldman Sachs, Samsung, IXL Learning, NVIDIA, PayPal, Oracle, ByteDance, Visa

Medium
Software Engineer

Return Any Strict Peak Index in Logarithmic Time

Problem Find any peak in a zero-indexed array and return its index. A peak is strictly greater than each adjacent in-bounds value. Treat the conceptua...

Coding & AlgorithmsBinary Search
4
0
26 people solved
Google logo
Google
Medium
Software EngineerSenior+

Enforce a Country's IP Ban List on Incoming Connections Using Its Lookup API

A country requires your service to refuse network connections from IP addresses it has banned. The country provides an API that, given an IP address, ...

System DesignSystem Design FundamentalsFault Tolerance & Failover
7
0
71 people solved
Aug 15, 2026
Google logo
Google
Medium
Software Engineer Locked

Design an Offline-First Client That Syncs Edits and Resolves Multi-Device Conflicts

Design the client side of an app where users keep editing data offline, store every edit locally, and sync with the server when the network returns. C...

System DesignConsistency & AvailabilityDistributed Transactions & Idempotency
23
0
171 people solved
Sep 7, 2026
Google logo
GoogleAmazonSalesforce

Also asked at Salesforce, Meta, Microsoft, Bloomberg, Oracle, TikTok, Arista Networks, Palo Alto Networks

Medium
Software Engineer

Collect Every Target-Sum Root-to-Leaf Value Path

Problem Return every root-to-leaf path in a binary tree whose node values sum to targetSum. Each returned path is a list of values in root-to-leaf ord...

Coding & AlgorithmsTreesBacktracking & Recursion
4
1
27 people solved
DoorDash logo
DoorDash
Medium
Software Engineer

Build a React Product List with ID-Based Updates and a Cart

Build a delivery-product homepage with React function components and hooks. Support adding, updating, and deleting products by ID, display quantities ...

Software Engineering FundamentalsReact & UI FrameworksState Management
0
0
8 people solved
Oct 27, 2026
Waymo logo
Waymo
Medium
Data Scientist Locked

SQL: Average Ride Rating in Users' First and Third Active Months by City

Write a PostgreSQL query that compares average ride ratings in each user's first and third active months, grouped by city and averaged over individual...

Data Manipulation (SQL/Python)SQL
14
0
118 people solved
Sep 10, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Paying Dashers Reliably When the Payment Service Is Unavailable

A delivery platform computes each Dasher's (delivery driver's) pay from their order events: pay accrues per minute in proportion to the number of orde...

System DesignPayments & LedgersDistributed Transactions & Idempotency
18
0
261 people solved
Sep 23, 2026
Decagon logo
Decagon
Medium
Software Engineer Locked

Walk Through a Project, a Project That Went Wrong, and How You Use AI

A culture-focused behavioral interview with three questions: describe a project you worked on, describe a project that went wrong, and explain how you...

Behavioral & LeadershipProject Deep DiveAI-Assisted Development
12
0
99 people solved
Sep 18, 2026
Capital One logo
Capital One
Hard
Software Engineer

Count Subarrays Containing at Least k Disjoint Pairs of Equal Values

Fruits travel along a conveyor belt, and fruits[i] is the type of the i-th fruit, written as an integer. For a contiguous segment of the belt, a pair ...

Coding & AlgorithmsTwo Pointers & Sliding Window
19
0
157 people solved
Sep 10, 2026
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