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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
Disney logo
Disney
Easy
Data EngineerSenior+

Prompting an LLM to Migrate a Java Codebase to Python and Clean a Large Database

Your team wants to use a large language model (LLM) to speed up two pieces of data engineering work: 1. migrating an entire codebase from Java to Pyth...

Software Engineering FundamentalsAI-Assisted DevelopmentData Cleaning & Wrangling
1
0
26 people solved
Aug 31, 2026
Citadel logo
Citadel
Easy
Software EngineerIntern Locked

Reduce Hashing and Safely Delete Shared File Content

Design file-content deduplication with deferred hashing, collision checks, stable shared-content identities, and reference-counted deletion.

System DesignData Structure DesignFile & Media Storage
26
1
268 people solved
Sep 3, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Design Peer-to-Peer Model Distribution Under a Shared Link Cap

Design peer-to-peer distribution of a large model from one seed to many targets when each machine shares a strict upload-and-download link budget. The...

System DesignFile & Media StorageFault Tolerance & Failover
35
1
307 people solved
Jul 15, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Site Reliability Engineer Locked

Compare Python Generators, Decorators, and Context Managers

Compare Python generators, decorators, and context managers through their protocols and execution timing, then combine them in a synchronous lazy file...

Software Engineering Fundamentals
13
0
192 people solved
Aug 16, 2026
Valon logo
Valon
Medium
Software Engineer

Design a Loan System with Borrower Repayments and Periodic Investor Payouts

Design the backend of a loan system. Borrowers hold loans and make repayments on them, and the system periodically pays out to the investors who own t...

System DesignPayments & LedgersDistributed Transactions & Idempotency
12
0
87 people solved
Apr 22, 2026
Asana logo
Asana
Medium
Software Engineer

Solve a Jigsaw Puzzle

You are given a collection of jigsaw puzzle pieces. Each piece has four edges — top, right, bottom, and left — and a helper function match(edgeA, edge...

Coding & AlgorithmsBacktracking & Recursion
89
0
937 people solved
Apr 2, 2026
Databricks logo
Databricks
Medium
Software Engineer

Implement Random Connectivity and Grid Routing

This entry contains two independent coding problems. Problem 1: Uniformly connect node groups You are given k non-empty, disjoint groups of unique nod...

Coding & AlgorithmsGraphsGrids & Matrices
24
1
280 people solved
Apr 17, 2026
MongoDB logo
MongoDBAppleGustoGoogle

Also asked at Gusto, Google

Easy
Software Engineer

Maximize Eight-Dollar Shares without Giving Anyone Four

Problem Distribute all money dollars among children children. Each child must receive at least one dollar, and no child may receive exactly four dolla...

Coding & AlgorithmsGreedyMath & Number Theory
2
0
16 people solved
Capital One logo
Capital One
Medium
Product Manager

Capital One Product Strategy: The Business Case for Mobile Banking App Engagement

You are a product manager at Capital One, the US bank and credit card issuer. The interviewer asks you to explain how a customer who uses Capital One'...

Product Design & StrategyBusiness Case AnalysisCausal Inference
5
0
68 people solved
Apr 5, 2026
Google logo
Google
Medium
Software EngineerSenior+

Assign the Minimum Number of Cars to Rental Requests

Each rental request has a unique request ID, a start time, and an end time. Assign a car ID to every request so that one car is never used by overlapp...

Coding & AlgorithmsIntervals & SchedulingGreedy
1
0
32 people solved
Jun 27, 2026
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Bloomberg, Apple, Meta, Roblox, TCS, BCG, Oracle, Goldman Sachs, Uber, Snowflake, Zeta Global, Nutanix, MathWorks

Medium
Software Engineer

Minimize CPU Intervals with Equal-Label Cooldowns

Problem Every tasks entry is a unit-time task labeled A through Z. Execute them in any order, inserting idle intervals if needed. Equal labels must ha...

Coding & AlgorithmsGreedyIntervals & Scheduling
0
0
12 people solved
Decagon logo
Decagon
Medium
Software Engineer Locked

Implement a Recipe Cart

This question evaluates the ability to design and implement stateful data structures and aggregation logic for tracking ingredient counts, applying ti...

Coding & AlgorithmsData Structure DesignStacks & Queues
43
0
323 people solved
May 20, 2026
Google logo
GoogleAmazonInfosys

Also asked at Infosys, myKaarma, Microsoft, Meta, Samsung, TCS, Uber, Bloomberg, PhonePe, Goldman Sachs, Cisco, Salesforce, UiPath, Paytm

Hard
Software Engineer

Maximize Coins from Bursting All Balloons

Problem Burst every balloon in some order. Bursting one earns its value times the values of its currently adjacent surviving neighbors; a missing oute...

Coding & AlgorithmsDynamic Programming
1
0
12 people solved
Google logo
Google
Hard
Machine Learning Engineer Locked

Explain Importance Sampling in LLM Training

Study importance sampling through likelihood ratios, support assumptions, off-policy LLM data, variance growth, clipping, and diagnostics.

Machine Learning
5
0
95 people solved
Aug 14, 2026
Google logo
GoogleMicrosoftBloomberg

Also asked at Bloomberg, Meta, Amazon

Easy
Software Engineer

Apply Score-Record Operations and Sum the Remaining Scores

Problem Start with an empty score record. An integer token appends that score; + appends the sum of the latest two remaining scores; D appends twice t...

Coding & AlgorithmsStacks & QueuesSimulation & State Machines
0
0
11 people solved
Revolut logo
Revolut
Medium
Software EngineerNew Grad

Implement a thread-safe money transfer

Problem: Implement a concurrent-safe transfer function You are given an in-memory store of bank accounts: - Each account has an accountId and a balanc...

Coding & AlgorithmsConcurrency
30
0
464 people solved
Feb 11, 2026
Glean logo
Glean
Medium
Software Engineer

Design a Test Strategy for a System That Counts the Leaves on a Large Tree

In a QA engineer interview, the testing scenario was: how would you test a system that counts the number of leaves on a large tree? The prompt is deli...

Software Engineering FundamentalsTesting & Quality
1
0
23 people solved
Sep 30, 2026
Google logo
GoogleMicrosoftMeta

Also asked at Meta, Amazon, Bloomberg, LinkedIn, Oracle, Palo Alto Networks, Josh Technology

Easy
Software Engineer

Mirror Binary-Tree Child Links through the Original Root

Problem Invert a binary tree by exchanging left and right children throughout the tree, and return its root. Keep the supplied TreeNode interface with...

Coding & AlgorithmsTrees
1
0
14 people solved
Verkada logo
Verkada
Medium
Software Engineer Locked

Validate a Partially Filled Sudoku Board

Validate a partially filled Sudoku board by checking every row, column, and three-by-three box for duplicate digits. The prompt distinguishes validity...

Coding & Algorithms
13
0
112 people solved
Sep 4, 2026
Google logo
Google
Easy
Data Scientist

Select MOST/LEAST appropriate actions (SJT)

Situational Judgment Test (SJT): Choose the MOST and LEAST appropriate action This question reproduces the format of a pre-interview Situational Judgm...

Behavioral & LeadershipEthics & ResponsibilityConflict & Collaboration
59
2
887 people solved
Dec 2, 2025
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