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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Arize logo
Arize
Medium
Software Engineer Locked

Coordinate Three Threads to Print an Ordered Sequence

Coordinate ZeroThread, OddThread, and EvenThread to print a labeled sequence from zero through a limit in strict order. The solution explains conditio...

Software Engineering Fundamentals
1
0
10 people solved
Aug 31, 2026
Whatnot logo
Whatnot
Easy
Software Engineer

Solve Adjacent-Deletion and Sorted-Square Problems

Solve the following coding problems. Discuss the approach and complexity before implementation. Problem 1: Remove adjacent duplicate pairs Given a str...

Coding & Algorithms
6
0
101 people solved
Apr 24, 2026
Affirm logo
Affirm
Medium
Software Engineer

Detect Fraud by Propagating Suspicious PII

Detect Fraud by Propagating Suspicious PII Process a stream of underwriting and fraud_flag events in order. Maintain a set of suspicious PII values dr...

Coding & Algorithms
14
4
118 people solved
Apr 19, 2026
Sig logo
Sig
Medium
Quantitative Trader

Expected Spins of an Unequal Spinner to Land in K Distinct Regions

A spinner has $N$ regions. Each spin lands in region $i$ with probability $p_i$, independently of all other spins, where $p_1 + p_2 + \dots + p_N = 1$...

Statistics & MathProbabilityDynamic Programming
0
0
5 people solved
Sep 19, 2026
Meta logo
Meta
Hard
Software Engineer Locked

Explain the Project You Are Most Proud Of

Prepare a project-pride behavioral interview answer that shows personal ownership, technical judgment, a meaningful course correction, and evidence of...

Behavioral & Leadership
2
0
36 people solved
Aug 3, 2026
Ramp logo
Ramp
Hard
Software Engineer Locked

Build a Resilient Chain of Clue-Driven HTTP Requests

Design a robust client that follows clue-driven HTTP responses until it reaches a result. Work through retry budgets, deadlines, backoff, malformed pa...

Software Engineering FundamentalsAPI Integration & HTTP ClientsApplication Security
12
0
228 people solved
Jul 18, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Design Food Reviews, Votes, and Reviewer Rewards

Design food ratings, written reviews, review votes, and race-safe reviewer rewards with clear schema boundaries. Enforce one current vote per user and...

System DesignDistributed Transactions & IdempotencySystem Design Fundamentals
39
0
271 people solved
Jul 10, 2026
OpenAI logo
OpenAI
Easy
Software Engineer

Design a Versioned Social Follow Graph with Friend Recommendations

Design a Versioned Social Follow Graph with Friend Recommendations Build an in-memory service that maintains a directed follow graph between users and...

Coding & Algorithms
14
2
88 people solved
Mar 16, 2026
Shopify logo
Shopify
Easy
Software EngineerSenior+ AI

Build a Local URL Shortener

Implement a local URL shortener that runs on a single machine. Design a small library or service with two core operations: - shorten(long_url) -> shor...

Coding & AlgorithmsData Structure Design
80
0
572 people solved
Jan 24, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Compute time to infect all cells

You are given an n × m grid representing people in a city. - Each cell is either infected (1) or healthy (0). - Two cells are neighbors if they share ...

Coding & AlgorithmsGrids & MatricesGraphs
142
1
1298 people solved
Oct 24, 2025
Asana logo
Asana
Medium
Software Engineer Locked

Model a Turn-Based Cats and Rabbits Board Game

Design the object model and move-validation flow for a two-player game on a 7 x 7 board. Make the API or object boundaries explicit, then cover invari...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
12
0
142 people solved
Aug 6, 2026
Attentive logo
Attentive
Medium
Software Engineer Locked

Design a Snapshot-Driven Product Catalog

Design a retailer product catalog built from complete snapshots while preserving administrator overrides as a separate source of truth. Candidates nee...

System Design
14
1
104 people solved
Aug 2, 2026
Mercor logo
Mercor
Medium
Software Engineer

Review a Hand-Rolled Python CSV Serializer for Correctness and Performance Bugs

You are reviewing this Python function, which is meant to turn a table (a list of rows, each row a list of cells) into CSV text: `python def to_csv(ta...

Software Engineering FundamentalsCode Quality & MaintainabilityParsing & Interpreters
1
0
22 people solved
May 31, 2026
Goldman Sachs logo
Goldman Sachs
Easy
Data ScientistIntern Locked

Maximize Covariance from Known Variances

Determine the maximum possible covariance when two random variables have variances 3 and 27.

Statistics & Math
4
0
36 people solved
Sep 2, 2026
A
Addepar
Easy
Software Engineer

Implement a URL-Prefix Sliding-Window Alert Monitor

Design the implementation of a URL-prefix alert monitor that ingests request logs. Each request belongs to its exact path and every parent path prefix...

Software Engineering FundamentalsData Structure DesignTrees
1
0
24 people solved
Aug 24, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Compute Plant Infection Time

This question evaluates a candidate's understanding of graph traversal and grid-based state propagation, including concepts like breadth-first search,...

Coding & Algorithms
12
0
125 people solved
May 24, 2026
Google logo
Google
Hard
Software Engineer AI Locked

Solve checksum and dependency debugging tasks

This question evaluates skills in string processing, modular arithmetic-based checksum computation and mapping, plus debugging of feature enablement l...

Coding & AlgorithmsGraphsArrays & Strings
23
0
203 people solved
Apr 4, 2026
Two Sigma logo
Two Sigma
Medium
Software Engineer Locked

Implement Price-Time Order Matching

This question evaluates understanding of limit-order book mechanics, priority-based matching, stateful stream processing, and data-structure managemen...

Coding & Algorithms
15
0
100 people solved
May 9, 2026
Imc logo
Imc
Easy
Hardware Engineer Locked

Analyze an Instruction Trace with Latency, Throughput, Cache, and Roofline Constraints

Analyze a simulated instruction trace using dependency latency, issue throughput, cache behavior, arithmetic intensity, and roofline bounds. The solut...

Software Engineering Fundamentals
1
0
29 people solved
Aug 24, 2026
Squarepoint logo
Squarepoint
Medium
Risk Technology Software EngineerSenior+ Locked

Concatenate Two C++ Index Sequences at Compile Time

Create a compile-time C++ utility that concatenates two index-sequence packs unchanged through variadic-template specialization, a convenient alias, a...

Software Engineering Fundamentals
1
0
21 people solved
Aug 16, 2026
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