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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Amazon logo
Amazon
Medium
Software Engineer

Compute delay times in priority array

Question Given an array of integers representing task priorities processed from right to left, return an array where each element is the distance (ind...

Coding & Algorithms
7
0
62 people solved
Aug 4, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Count islands and distinct shapes

Question LeetCode 200. Number of Islands LeetCode 694. Number of Distinct Islands https://leetcode.com/problems/number-of-islands/description/ https:/...

Coding & Algorithms
6
0
47 people solved
Jul 29, 2025
XPeng logo
XPeng
Medium
Data Engineer

Build a Least-Recently-Used Store

Implement an in-memory key-value store with least-recently-used eviction. The store is initialized with a positive integer capacity and supports two o...

Coding & Algorithms
5
0
39 people solved
Apr 11, 2026
Lyft logo
Lyft
Medium
Software Engineer

Design a One-to-One Chat Service

Design a One-to-One Chat Service Design a messaging service for private conversations between two users. Cover message sending, retrieval, ordering, o...

System Design
4
0
27 people solved
Apr 17, 2026
Airbnb logo
Airbnb
Hard
Software Engineer

Design a customer LTV prediction system

System Design: End-to-End ML for Customer Lifetime Value (LTV) Context You are designing an end-to-end machine learning system to estimate customer li...

ML System DesignFeature EngineeringML Data Pipelines & Feature Stores
19
0
191 people solved
Aug 12, 2025
Meta logo
Meta
Medium
Software Engineer

Count palindrome substrings in a string

Given a lowercase ASCII string s, count the number of substrings that are palindromes and return the count. Implement an O(n^ 2) solution using expand...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
8
0
89 people solved
Sep 6, 2025
IXL Learning logo
IXL Learning
Medium
Software Engineer

Identify and prevent code-breaking inputs

Identify and prevent code-breaking inputs Identify inputs and scenarios that could break your implementation and explain how you would prevent them. C...

Coding & AlgorithmsTesting & Quality
8
0
89 people solved
Jul 17, 2025
Thumbtack logo
Thumbtack
Medium
Data Scientist

Compute weighted response rates by job category

You are given a CSV with one row per job posting and the following columns: job_id, job_category, invitations_sent (integer >= 0), provider_responses ...

Data Manipulation (SQL/Python)
2
0
31 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Should WhatsApp launch group calls?

This question evaluates a data scientist's skills in experiment design, product analytics, metric definition, causal inference, and managing network e...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
20
0
137 people solved
Mar 24, 2026
Google logo
Google
Medium
Software Engineer

Group movies via graph traversal

You are given n movies labeled 0..n-1 and a list of undirected pairs (a, b) meaning movies a and b are similar. Group all movies into categories where...

Coding & AlgorithmsGraphs
12
1
225 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Data Scientist

Compute gala vs online break-even donors

A nonprofit must choose one of two fundraising options. Option A (Gala): capacity 100 attendees; fixed cost $20,000; variable cost $100 per attendee. ...

Statistics & Math
9
0
80 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Solve six algorithmic problems

Answer the following independent algorithmic prompts. For each, explain your approach, justify data structures, analyze time/space complexity, and pro...

Coding & AlgorithmsTreesArrays & Strings
10
0
189 people solved
Sep 6, 2025
Pinterest logo
Pinterest
Medium
Machine Learning Engineer Locked

Explain bias–variance, overfitting, and vanishing gradients

This question evaluates understanding of core machine learning fundamentals—specifically the bias–variance tradeoff, overfitting detection and mitigat...

Machine LearningML FundamentalsNeural Networks & Training
12
0
184 people solved
Jan 22, 2026
Rippling logo
Rippling
Medium
Data Analyst Locked

Build a Gap-Free Monthly Booking Summary

Build a PostgreSQL monthly report that fills missing calendar periods for each product and booking type. Practice distinct-customer counts, cumulative...

Data Manipulation (SQL/Python)
4
0
36 people solved
May 28, 2026
eBay logo
eBay
Hard
Software EngineerSenior+

Answer senior behavioral questions

For a senior software engineering interview, prepare strong answers to the following leadership and impact questions: 1. Tell me about a time you infl...

Behavioral & LeadershipLeadership & InfluenceProject Deep Dive
15
0
100 people solved
Mar 7, 2026
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Find minimum moves to solve the 15-puzzle

This question evaluates understanding of state-space search, heuristic reasoning, and solvability analysis for combinatorial sliding puzzles, testing ...

Coding & Algorithms
3
0
59 people solved
Feb 11, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Design a distributed cron job scheduler

Design a distributed cron job scheduler System Design: Distributed Cron Job Scheduler Context You are designing a multi-tenant, internet-scale cron jo...

System DesignJob Scheduling & WorkflowsDistributed Coordination
20
0
258 people solved
Jul 28, 2025
Meta logo
Meta
Medium
Software Engineer

Compute longest increasing path in a matrix

Compute longest increasing path in a matrix Given an m × n integer matrix, return the length of the longest path of strictly increasing values, where ...

Coding & Algorithms
2
0
45 people solved
Jul 27, 2025
Meta logo
Meta
Medium
Data Scientist

Identify Top 10 Users by Average Call Duration

video_calls | call_id | user_id | start_time | end_time | |---------|---------|----------------------|----------------------| | ...

Data Manipulation (SQL/Python)
8
0
60 people solved
Jul 12, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Implement string compression and decompression

This question evaluates proficiency in string manipulation, run-length encoding concepts, parsing numeric counts, and validation of encoded formats, i...

Coding & Algorithms
2
0
29 people solved
Jan 30, 2026
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