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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Salesforce logo
Salesforce
Medium
Software Engineer Locked

Implement common data-structure and JS tasks

This multi-part prompt evaluates core competencies in data structures and algorithms (time-based key-value design, duplicate removal in sorted linked ...

Coding & AlgorithmsData Structure DesignJavaScript & TypeScript
14
0
189 people solved
Feb 12, 2026
HubSpot logo
HubSpot
Medium
Software Engineer

Design a bank with scheduled payments and merges

Design an in-memory banking service that supports the following operations: ( 1) CreateAccount(accountId), ( 2) Deposit(accountId, amount), ( 3) Trans...

Coding & AlgorithmsLow-Level Design (OOP)
31
0
241 people solved
Sep 6, 2025
Waymo logo
Waymo
Medium
Software EngineerSenior+ Locked

Can You Reach the Last Index?

This question evaluates a candidate's understanding of array traversal and reachability in sequences of jumps, along with the ability to reason about ...

Coding & AlgorithmsGreedy
19
0
143 people solved
Feb 6, 2026
Rippling logo
Rippling
Hard
Software Engineer

Design a flexible expense reimbursement system

System Design: Expense Reimbursement with Pluggable Rules and Group Constraints Context Design an enterprise expense reimbursement platform where admi...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
50
0
471 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Medium
Data Scientist

Diagnose Low CTR in an Advertising Campaign Funnel

Diagnose Low CTR in an Advertising Campaign Funnel An analysis has flagged several ad campaigns because their click-through rate (CTR) is below the av...

Analytics & Experimentation
5
0
38 people solved
Apr 4, 2026
Coinbase logo
Coinbase
Hard
Software Engineer

Design real-time stock price viewer

System Design: Real‑Time Stock Prices Viewer (No History) You are designing a real‑time system that lets clients view current stock prices only. No hi...

System DesignReal-Time SystemsTrading Systems
36
0
313 people solved
Sep 6, 2025
Fannie Mae logo
Fannie Mae
Medium
Data Scientist

Understand SQL Aggregations and Joins: Key Differences Explained

Employees +----+--------+--------+---------+ | id | name | salary | dept_id | +----+--------+--------+---------+ | 1 | Alice | 70000 | 1 | ...

Data Manipulation (SQL/Python)
104
0
419 people solved
Jul 12, 2025
Meta logo
Meta
Hard
Software Engineer

Design an in-memory cloud storage system

In-Memory Cloud Storage Service (Take-home) Design and implement an in-memory cloud storage service that maps files (objects) to their metadata. The s...

System DesignLow-Level Design (OOP)Data Structure Design
21
0
293 people solved
Sep 6, 2025
Salesforce logo
Salesforce
Hard
Software Engineer

Answer ownership, conflict, and failure recovery questions

You are in a 45-minute hiring manager (behavioral) interview. Prepare structured answers to: 1. Ownership: Describe a project where you showed the mos...

Behavioral & LeadershipOwnership & ExecutionConflict & Collaboration
12
0
96 people solved
Jan 22, 2026
Instacart logo
Instacart
Medium
Software Engineer

Compute delivery wait times

You're building a last‑mile delivery simulator. Given n orders, each with arrival_time (non-decreasing integers) and service_time (positive integers),...

Coding & AlgorithmsHeaps & Priority QueuesSimulation & State Machines
7
0
116 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software EngineerIntern Locked

Replace Delimited Tokens in a String

This question evaluates string parsing, token recognition, and dictionary lookup competencies for robust text replacement, including handling malforme...

Coding & Algorithms
4
0
35 people solved
May 28, 2026
Instacart logo
Instacart
Medium
Software Engineer

Implement matrix-indexing and expression resolver

Question Given a text file path whose contents include a single block starting with a line like "[2,4]" followed by rows of equal-length characters (e...

Coding & Algorithms
95
0
292 people solved
Jul 29, 2025
Reddit logo
Reddit
Hard
Data Scientist

Justify synthetic control and handle inference

Synthetic Control: Assumptions, Estimation, Inference, and Diagnostics Context You are estimating the causal effect of an intervention on a single tre...

Statistics & MathCausal InferenceHypothesis Testing
13
0
191 people solved
Oct 13, 2025
BlackRock logo
BlackRock
Easy
Software Engineer Locked

Traverse a tree and answer 2D prefix sums

This question evaluates a candidate's competency in tree traversal and array preprocessing, specifically in-order traversal of binary trees and 2D pre...

Coding & AlgorithmsTreesGrids & Matrices
17
0
116 people solved
Jan 22, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Track the First Unique Restaurant in a Stream

Track integer restaurant IDs in arrival order and answer each query with the earliest value seen exactly once so far, or -1 when no unique value remai...

Coding & Algorithms
4
1
30 people solved
May 26, 2026
Instacart logo
Instacart
Medium
Software Engineer

Evaluate arithmetic expression using DFS

Given a string representing an arithmetic expression with non-negative integers, +, -, *, /, parentheses, and optional spaces, evaluate its value. Use...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
7
0
110 people solved
Jul 31, 2025
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Software Engineer

Implement 3x3 matrix transforms and rotation

Implement 3x3 matrix transforms and rotation For a 3x3 matrix, write Python code to: (a) transpose it in-place; (b) swap any two rows and any two colu...

Coding & AlgorithmsGrids & Matrices
26
0
199 people solved
Aug 8, 2025
Pinduoduo logo
Pinduoduo
Medium
Software Engineer Locked

Implement a Followable Microblog Timeline

Implement an in-memory microblog with posting, following, unfollowing, and a newest-first timeline capped at ten visible tweets. Respect current follo...

Coding & Algorithms
3
0
43 people solved
Jul 26, 2026
Google logo
Google
Medium
Machine Learning Engineer

Answer conflict, failure, and proud project questions

Behavioral questions Answer the following behavioral prompts using real examples from your experience: 1. Conflict: Tell me about a time you had a con...

Behavioral & LeadershipConflict & CollaborationFailure & Learning
8
0
119 people solved
Jan 22, 2026
Airbnb logo
Airbnb
Medium
Software Engineer

Compute shortest path to collect all keys

You are given an m×n grid containing walls (#), open cells (.), a single start cell (@), up to six keys labeled 'a'–'f', and matching doors 'A'–'F' th...

Coding & AlgorithmsGrids & MatricesGraphs
12
0
140 people solved
Jul 31, 2025
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