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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
Meta logo
Meta
Medium
Data Scientist

Compute 95th-percentile call concurrency

Given N call sessions as half-open intervals [start, end) in UNIX seconds, design an algorithm to compute the 95th percentile of per-minute concurrent...

Coding & Algorithms
5
0
55 people solved
Oct 13, 2025
Bitkernel logo
Bitkernel
Medium
Software Engineer

Detect impossible binary search comparison sequence

Consider binary search on a sorted array of numeric keys. The following options list possible sequences of key values that the algorithm might compare...

Software Engineering Fundamentals
5
0
43 people solved
Oct 24, 2025
TikTok logo
TikTok
Medium
Data Scientist

Implement streaming SRM detector with late events

Implement a streaming detector for sample ratio mismatch (SRM) across many concurrent experiments. Input is two topic-partitioned streams: assignments...

Coding & AlgorithmsHypothesis TestingBatch & Stream Processing
4
0
92 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Engineer

Compute capacities after site closures

You are given a nested dictionary redistribution where redistribution[closed_site][dest_site] equals the additional capacity required at dest_site if ...

Coding & Algorithms
7
0
80 people solved
Sep 6, 2025
Apple logo
Apple
Medium
Software Engineer Locked

Rotate a Matrix In Place

This question evaluates proficiency in in-place matrix and array manipulation, understanding of spatial transformations, and consideration of space an...

Coding & Algorithms
4
0
68 people solved
Apr 4, 2026
Bridgewater logo
Bridgewater
Medium
Software Engineer Locked

Defend the Technical Details of a Project

Defend one project through a focused technical deep dive into its problem, architecture, request or data flow, and hardest implementation choices. Exp...

Behavioral & Leadership
1
0
32 people solved
Jul 8, 2026
Meta logo
Meta
Medium
Data Scientist

Explain Type I vs. Type II Errors in A/B Testing

Explain Type I vs. Type II Errors in A/B Testing A/B Testing Errors and Estimation Under Skewed Metrics Context You are analyzing an A/B experiment fo...

Statistics & Math
21
0
70 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Product Manager

ML Pipeline Stability & Evaluation

Product and ML Prompt: Stabilizing a Time-Series ML Pipeline You are the Product Manager for a system that uses time-series machine learning to predic...

Product / Decision Making
20
0
71 people solved
Jul 4, 2025
ByteDance logo
ByteDance
Hard
Site Reliability Engineer

Determine whether squares can fit

You are given an m x n rectangular grid and an array squares, where each value represents the side length of a square that must be cut from the origin...

Coding & Algorithms
4
0
75 people solved
Jan 27, 2026
MathWorks logo
MathWorks
Medium
Software Engineer Locked

Design a multi-tenant course purchase and delivery system

This question evaluates a candidate's skills in designing scalable multi-tenant architectures, covering data modeling for tenants, organizations, and ...

System Design
6
0
60 people solved
Jan 22, 2026
Wayfair logo
Wayfair
Easy
Data Scientist Locked

Clean scores and return top 5 students

This question evaluates proficiency in data cleaning and transformation for Data Science, focusing on handling missing values, median imputation, and ...

Data Manipulation (SQL/Python)Pandas & Python DataData Cleaning & Wrangling
5
0
78 people solved
Feb 18, 2026
Meta logo
Meta
Medium
Data Scientist

Comparing two ad‑insertion strategies

Comparing Two Ad Insertion Methods You are designing an ad insertion system. In a short time bucket or session, there are n eligible content slots whe...

Analytics & Experimentation
15
0
41 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Machine Learning Engineer AI Locked

Extend a Maze Solver

This question evaluates proficiency in implementing and debugging graph search algorithms and state-space modeling, including correct visited-state ha...

Coding & Algorithms
3
0
43 people solved
Feb 8, 2026
LinkedIn logo
LinkedIn
Medium
Software EngineerSenior+ Locked

Design a metrics platform without alerting

This question evaluates a candidate's ability to design a scalable time-series metrics platform, covering data modeling for counters/gauges/histograms...

System DesignObservabilityStorage & Sharding
18
0
193 people solved
Dec 26, 2025
Capital One logo
Capital One
Medium
Data Scientist

Optimize Pricing Strategy to Achieve Profitability and Market Growth

Cloud-Service Startup Pricing and Go-To-Market Case A cloud-service startup is reevaluating its pricing and go-to-market strategy while currently oper...

Behavioral & Leadership
91
0
266 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer

Solve word count, node, segmentation, stock tasks

You have four tasks: 1) Count words with explicit rules: Given a text document, return the number of words. First define precisely what qualifies as a...

Coding & Algorithms
5
0
57 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software Engineer

Implement a robust shell CLI

Implement a POSIX-compliant shell script invoked as ./script.sh <username> <path_of_file> that outputs a single line formatted as "<timestamp> <licens...

Coding & Algorithms
6
0
64 people solved
Sep 6, 2025
HubSpot logo
HubSpot
Hard
Software Engineer

Design a near-real-time weather API

Question Design a weather data platform that retrieves best-effort hourly dumps from an external Weather Service API for approximately 2,000 locations...

System DesignSystem Design FundamentalsCaching
20
0
257 people solved
Sep 6, 2025
Google logo
Google
Medium
Software Engineer

Assess behavioral competencies across scenarios

Behavioral Competency Prompts (Software Engineer, HR Screen) Provide specific work situations that demonstrate each competency below. Use concise STAR...

Behavioral & LeadershipEthics & ResponsibilityAmbiguity & Decision Making
8
0
119 people solved
Sep 6, 2025
Beaconfire logo
Beaconfire
Easy
Machine Learning Engineer Locked

Check Whether a String Is Built by Repetition

This question evaluates string manipulation and pattern recognition skills, focusing on detection of repeated substring patterns, string periodicity, ...

Coding & Algorithms
1
0
15 people solved
May 21, 2026
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