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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026
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
Glean logo
Glean
Medium
Software Engineer

Delete the Fewest Parentheses to Balance a String of Only Open and Close Brackets

You are given a string s that contains only the characters '(' and ')'. Delete the minimum number of characters so that the remaining string is balanc...

Coding & AlgorithmsStacks & Queues
0
0
6 people solved
Sep 30, 2026
ByteDance logo
ByteDance
Medium
Software EngineerNew Grad

Check Whether an n x n Tic-Tac-Toe Game Is Over (Win or Draw)

You are given the current state of an n x n tic-tac-toe board played by two players. A player wins by occupying all n cells of any row, any column, th...

Coding & AlgorithmsGrids & Matrices
1
0
20 people solved
Sep 13, 2026
Glean logo
Glean
Medium
Software Engineer

Implement a Byte-Pair Encoding Tokenizer: Threshold Training, Encode and Decode

Implement a byte-pair encoding (BPE) tokenizer from scratch with three functions: - train(text: str, threshold: int) learns merge rules from text. - e...

Software Engineering FundamentalsArrays & Strings
0
0
8 people solved
Sep 30, 2026
Cohere logo
Cohere
Medium
Frontend Engineer

Implement a Card-Details Form with Dependent Validation

Implement a React card-details form with validation and dependent input behavior. Explain how changing one field causes related fields to be revalidat...

Software Engineering FundamentalsReact & UI FrameworksState Management
1
0
15 people solved
Sep 15, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Resume Deep Dive: Technical Decisions, Personal Contribution, Challenges, Impact

This is a behavioral round built around your resume. The interviewer picks projects from your past work and asks you to go through them in detail: the...

Behavioral & LeadershipProject Deep Dive
2
0
19 people solved
Sep 6, 2026
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Validate a Hierarchy and Compute Propagation Time

Build a rooted hierarchy from relationship data, detect invalid cycles, and compute the longest root-to-node propagation distance.

Coding & Algorithms
6
0
125 people solved
Sep 2, 2026
Jane Street logo
Jane Street
Easy
Software EngineerNew Grad

Transform sparse time-code stream to dense rows

Problem You are given: - A fixed set of M distinct codes (strings). The column order of the output matrix is the lexicographic order of these codes. -...

Coding & AlgorithmsData Structure Design
144
1
1094 people solved
Feb 12, 2026
MongoDB logo
MongoDB
Medium
Software EngineerSenior+

Reason About Recursive Key Search in Nested JSON

Reason About Recursive Key Search in Nested JSON Given an in-memory JSON-like object whose values may include strings, numbers, booleans, lists, or ne...

Software Engineering Fundamentals
4
1
72 people solved
Aug 18, 2026
Airbnb logo
Airbnb
Hard
Software Engineer Locked

Process a Timestamped Workspace Credit Ledger

Implement a timestamped workspace credit ledger with deposits, transfers, spending, delayed cashback, rankings, merges, status checks, and historical ...

Coding & Algorithms
15
0
206 people solved
Aug 6, 2026
LinkedIn logo
LinkedIn
Hard
Software Engineer Locked

Reduce Stale Listings in a Job Marketplace

Design an auditable system that scores stale job listings from mixed-source evidence and applies graduated, reversible actions with employer appeals.

System Design
4
0
80 people solved
Sep 1, 2026
Hudson River Trading logo
Hudson River Trading
Hard
Software Engineer Locked

Wrap a Fixed-Chunk Stream Reader with Arbitrary-Length Reads

This Hudson River Trading software engineering question asks candidates to wrap a fixed-chunk stream reader with arbitrary-length reads. It is useful ...

Software Engineering FundamentalsData Structure Design
18
0
303 people solved
Jul 2, 2026
Squarepoint logo
Squarepoint
Medium
Data Scientist

Compare Bonds, Common Equity, and Dividend Payments

Explain the difference between a bond and common equity. Compare the holder's claim, possible cash flows, and main risks, and explain whether an equit...

Statistics & Math
2
0
19 people solved
Sep 9, 2026
Charta Health logo
Charta Health
Medium
Software Engineer

Explain Your Project and Motivation for Charta Health

Give a detailed walkthrough of a project you worked on, then explain why you are interested in joining Charta Health. Part 1 — Project deep dive Descr...

Behavioral & LeadershipProject Deep DiveMotivation & Fit
2
0
40 people solved
Sep 9, 2026
Meta logo
Meta
Medium
Software Engineer

Lowest Common Ancestor of Two Values in a Binary Tree Given in Level Order

Given a binary tree whose node values are all distinct, and two values p and q that both occur in it, return the value of their lowest common ancestor...

Coding & AlgorithmsTrees
2
0
24 people solved
Sep 14, 2026
Houzz logo
Houzz
Medium
Software Engineer

Convert a Column Number to an Excel-Style Label

Convert a one-based spreadsheet column number into its Excel-style column label. Columns 1 through 26 are A through Z; column 27 is AA, and the sequen...

Coding & AlgorithmsMath & Number Theory
1
0
16 people solved
Sep 18, 2026
Deshaw logo
Deshaw
Medium
Software Engineer

Explain What Happens When a Linux Shell Runs ls

What happens after a user enters ls in a Linux shell and presses Enter, until the directory listing and the next shell prompt appear? Describe a typic...

Software Engineering FundamentalsOperating SystemsParsing & Interpreters
2
1
41 people solved
Aug 25, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Review Constant-Time Random Courier Selection and Removal

Review a delivery-assignment service that stores couriers in dasher_map under contiguous integer keys starting at 0. add_dasher inserts a courier. pic...

Software Engineering FundamentalsData Structure Design
2
0
25 people solved
Sep 5, 2026
IBM logo
IBM
Medium
Software Engineer Locked

Maximize Revenue from Depleting VM Stock

Practice maximizing revenue by repeatedly selling from the highest remaining VM stock, including harmless ties and large counts.

Coding & Algorithms
17
3
121 people solved
Aug 28, 2026
Digitalocean logo
Digitalocean
Medium
Software Engineer

Design a Multi-Organization Advertising Platform with Performance Statistics

Design an advertising platform that displays ads from multiple organizations and collects statistics to compare which ads perform better or worse. Con...

System DesignAds Systems
1
0
18 people solved
Sep 16, 2026
Tekion logo
Tekion
Medium
Software EngineerSenior+

Find an Optimal Strategy for an Even-Row Coin Game

A and B play a game with an even number of coins arranged in a row. They alternate turns, with A moving first. On each turn, the player takes one coin...

Statistics & MathDynamic ProgrammingMath & Number Theory
4
0
32 people solved
Sep 10, 2026
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