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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
Ziprecruiter logo
Ziprecruiter
Easy
Machine Learning Engineer Locked

Debug Feature Updates in a Laptop Management CLI

Debug a laptop-management CLI that applies feature selections to the wrong device and exits unsuccessfully during an update. Build a reproducible trac...

Software Engineering Fundamentals
5
0
71 people solved
Jul 25, 2026
Sig logo
Sig
Medium
Quantitative Trader

Expected Payoff of a Three N-Sided Dice Matching Game

You roll three fair $N$-sided dice, with faces numbered 1 through $N$. If all three dice show the same number, you receive $A$ dollars. If exactly two...

Statistics & MathProbabilityPuzzles & Brainteasers
0
0
4 people solved
Sep 19, 2026
Perplexity logo
Perplexity
Medium
Data Scientist Locked

Implement Stratified Sampling by Country

This question evaluates understanding of stratified sampling, proportional allocation across groups, reproducible random sampling, data grouping and e...

Coding & AlgorithmsSampling & Estimation
8
0
118 people solved
Apr 9, 2026
Uber logo
Uber
Hard
Software Engineer

Smallest Palindromic Number Strictly Greater Than n, Up to 18 Digits

Given a positive integer n written as a decimal string, return the smallest integer that is strictly greater than n and is a palindrome, meaning its d...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
3
0
31 people solved
Jun 29, 2026
Squarepoint logo
Squarepoint
Medium
Software Engineer Locked

Find the Most Frequent Character with a Tie-Breaker

Find the most frequent lowercase character in a large string. Resolve equal frequencies by returning the lexicographically smallest character and acco...

Coding & Algorithms
7
0
60 people solved
Jul 12, 2026
Meta logo
Meta
Medium
Software EngineerSenior+ AI

Solve Maze and Suffix Problems

Solve the following two coding problems. Problem A: Find the shortest path through a maze with keys and doors You are given a 2D grid representing a m...

Coding & Algorithms
5
0
68 people solved
Apr 25, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer

Find the Lowest Common Ancestor of Two Nodes in an N-ary Tree

You are given a rooted tree in which every node may have any number of children (an N-ary tree). The nodes are labeled 0 to n - 1, node 0 is the root,...

Coding & AlgorithmsTrees
1
0
14 people solved
Jun 7, 2026
Axon logo
Axon
Medium
Software Engineer

Find accessible devices via nested memberships

Problem You are given an access model with nested groups: - A group can contain users and also contain other groups (subgroups). - A user can own or b...

Coding & AlgorithmsGraphs
26
1
182 people solved
Mar 1, 2026
Stripe logo
Stripe
Medium
Software Engineer

Find linked user records by similarity

You are given a list of user records. Each record has the following fields: - id (integer, unique) - name (string) - email (string) - company (string)...

Coding & AlgorithmsGraphsArrays & Strings
22
0
239 people solved
Dec 8, 2025
Nuro logo
Nuro
Hard
Software EngineerIntern Locked

Reveal a Minesweeper Region with Adjacent-Mine Counts

Implement a Minesweeper reveal operation that counts all eight neighboring cells, opens connected zero-mine regions, and stops expansion at numbered b...

Coding & Algorithms
5
0
79 people solved
Aug 13, 2026
Google logo
Google
Hard
Software EngineerSenior+

Design Customer Support with Virtual-Agent-to-Human Escalation

Design a customer-support system in which a user converses with a virtual agent and can be escalated to a human support agent. Explain how conversatio...

System DesignReal-Time SystemsDistributed Coordination
0
0
11 people solved
Jul 20, 2026
Squarepoint logo
Squarepoint
Medium
Software Engineer Locked

Return Elements Greater Than the Overall Average

Return every integer that is strictly greater than the overall arithmetic mean. Preserve input order and duplicates while handling negative values and...

Coding & Algorithms
9
0
72 people solved
Jul 12, 2026
Wells Fargo logo
Wells Fargo
Medium
Software EngineerSenior+ Locked

Java, Spring & Kafka Fundamentals Deep-Dive

This question tests depth of knowledge across core Java, Spring Boot, and Kafka fundamentals commonly required for senior backend engineering roles. I...

Software Engineering FundamentalsLow-Level Design (OOP)Messaging & Event-Driven
37
0
486 people solved
Jun 24, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Payment Processing System with Exactly-Once Charging

This question evaluates a candidate's ability to design a payment system that guarantees exactly-once charging under network failures, retries, and du...

System DesignPayments & LedgersDistributed Transactions & Idempotency
38
0
449 people solved
Jun 26, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Design GPU credit allocator

Design a GPU Credit Allocation System Design a GPU credit allocation system for a multi-tenant compute platform (for example, OpenAI's GPU infrastruct...

System DesignGPU InfrastructurePayments & Ledgers
397
0
3024 people solved
Aug 4, 2025
Rippling logo
Rippling
Medium
Software EngineerSenior+ Locked

Staff Engineer Hiring-Manager Round: Platform Ownership, AI Adoption, and Cross-Team Influence

This question evaluates a candidate's ability to narrate scope, ownership, and cross-team influence at the senior or staff engineering level, using a ...

Behavioral & LeadershipProject Deep DiveLeadership & Influence
18
0
165 people solved
Jun 13, 2026
Capital One logo
Capital One
Medium
Product AnalystSenior+

Evaluate Two Partnerships with Unit Economics and Break-Even Analysis

Evaluate Two Partnerships with Unit Economics and Break-Even Analysis Work through two profitability cases. In the first, a restaurant considers a dis...

Product / Decision Making
4
0
60 people solved
May 4, 2026
Google logo
Google
Easy
Software Engineer Locked

Find Common Free Time Slots Across Calendars

This question evaluates a candidate's ability to work with interval merging and sweep-line techniques over multiple overlapping schedules. It tests pr...

Coding & Algorithms
4
1
54 people solved
Jun 22, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Implement Social Graph Snapshot Queries

This question evaluates understanding of graph data structures, query-efficient indexing, and algorithmic trade-offs for static directed graphs, inclu...

Coding & AlgorithmsGraphsData Structure Design
10
0
126 people solved
Apr 13, 2026
Glean logo
Glean
Medium
Software Engineer Locked

Return Top Department Suggestions

This question evaluates proficiency in prefix-based search and top-k ranking, familiarity with in-memory data structures and preprocessing strategies,...

Coding & Algorithms
10
0
68 people solved
May 17, 2026
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