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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
454
Companies
967
Updated
10.18.2026
454 Questions 967 Companies10.18.2026
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
Google logo
Google
Medium
Product Manager

Back-of-envelope estimate: what remote work costs a mid-sized app maker in output

A mid-sized company that develops apps moves its employees from the office to remote work. Estimate how much productivity the company should expect to...

Product / Decision MakingEstimation & Market SizingMetrics & KPIs
0
0
7 people solved
Nov 10, 2025
Google logo
Google
Medium
Product Manager

Fermi Sizing Exercise: Dentist Count for New York

Estimate the number of dentists in New York. Lay out how you structure the estimate, call out each assumption, and end with a figure and a sense of ho...

Product / Decision MakingEstimation & Market Sizing
0
0
6 people solved
Oct 20, 2023
Capital One logo
Capital One
Medium
Data Scientist

Evaluate Energy One's Transition to Renewable Energy Sources

Evaluate Energy One's Transition to Renewable Energy Sources Energy One is evaluating a move from fossil fuels to renewable power and must analyze fin...

Analytics & ExperimentationBusiness Case AnalysisMetrics & KPIs
64
0
193 people solved
Jul 12, 2025
Google logo
Google
Medium
Product Manager

Capacity sizing: Google Drive disk space and network throughput for the coming year

You are a product manager on Google Drive. Estimate how much storage capacity and how much network bandwidth the Drive service will need next year. Sh...

Product / Decision MakingEstimation & Market SizingSystem Design Fundamentals
0
0
4 people solved
Dec 26, 2023
Google logo
Google
Medium
Product Manager

Fermi estimate: sizing the global number of mobile handsets

Estimate the total number of mobile phones that exist worldwide. Lay out how you structure the estimate, label each assumption, and finish with a figu...

Product / Decision MakingEstimation & Market Sizing
0
0
4 people solved
Feb 2, 2024
Google logo
Google
Medium
Product Manager

Next-gen vending kiosk for Bay Area World Cup 2026 stadiums and how many to deploy

The Bay Area will be one of the host regions for the 2026 soccer World Cup. You are the product manager asked to design a futuristic vending machine t...

Product Design & StrategyProduct SenseEstimation & Market Sizing
0
0
7 people solved
Dec 14, 2024
Google logo
Google
Medium
Product Manager

Market-sizing estimate: number of live apps in a major mobile app store

In a product manager interview at Google, you are asked to estimate how many apps are listed in one of the two major mobile app stores: Apple's App St...

Product / Decision MakingEstimation & Market Sizing
0
0
6 people solved
Jun 6, 2025
Google logo
Google
Medium
Product Manager

Fermi estimate: balls required to pack a room measuring 16 by 16 feet

Estimate how many balls it would take to fill a room that measures 16 feet by 16 feet. Talk through how you structure the estimate, state each assumpt...

Product / Decision MakingEstimation & Market Sizing
0
0
5 people solved
Dec 6, 2023
Google logo
Google
Medium
Product Manager

Fermi estimate: total kernel count in a 10 kg sack of rice

A bag of rice weighs 10 kg. Roughly how many individual grains are inside it? Walk through your estimate step by step. `hint Shrink the problem Work o...

Product / Decision MakingEstimation & Market Sizing
0
0
4 people solved
Dec 9, 2024
Swiggy logo
Swiggy
Medium
Product Manager

Estimating the Economic Cost of Traffic Jams Across India

The government wants to know how much money the Indian economy loses because of traffic congestion. Produce that estimate: decide which losses to coun...

Product / Decision MakingEstimation & Market Sizing
0
0
4 people solved
Jan 22, 2024
Google logo
Google
Medium
Product Manager

Recommend Google's Long-Term Strategic Bets and How to Prioritize Them

You are a product manager at Google, and leadership asks for your view on where the company should invest over the next five to ten years. Recommend t...

Product Design & StrategyProduct StrategyPrioritization & Tradeoffs
0
0
3 people solved
Sep 12, 2025
Google logo
Google
Medium
Product Manager

Fermi Estimate: Total Daily Minutes Spent Watching YouTube Cooking Content

How much time, added up across all viewers, goes into watching cooking videos on YouTube on a typical day? Build an estimate, explain the assumption b...

Product / Decision MakingEstimation & Market Sizing
0
0
5 people solved
Sep 21, 2024
Google logo
Google
Medium
Product Manager

Biosignal capture technology: brainstorm five products, then size month-one data storage

Suppose you have invented a technology that can collect every signal the human body gives off. As the product manager, you have to decide what to do w...

Product Design & StrategyProduct SenseEstimation & Market Sizing
0
0
7 people solved
Feb 20, 2025
Google logo
Google
Medium
Product Manager

Estimate the yearly worldwide X-ray count to size an AI image-analysis service

Estimate how many X-rays are taken around the world in one year. Context: Google has announced that its AI can analyze X-rays about as well as a human...

Product / Decision MakingEstimation & Market Sizing
0
0
4 people solved
Feb 23, 2024
Amazon logo
Amazon
Medium
Product Manager

Back-of-envelope estimate of what one self-driving truck costs

Estimate how much a driverless truck costs. Explain how you break the problem down, label each assumption, show your arithmetic, and finish with a fig...

Product / Decision MakingEstimation & Market Sizing
0
0
3 people solved
Jan 14, 2024
Visa logo
Visa
Medium
Product Manager

Estimating U.S. Daily Payment Transaction Volume for a Card Network

Estimate how many transactions take place in the United States on an average day. `hint Define the unit before the math Decide which payments count an...

Product / Decision MakingEstimation & Market Sizing
0
0
6 people solved
Jul 3, 2024
Google logo
Google
Medium
Product Manager

Back-of-the-Envelope Count of Canada's Cows

Estimate how many cows there are in Canada. Show how you break the problem down, label each assumption, and end with a figure, a range and how confide...

Product / Decision MakingEstimation & Market Sizing
0
0
4 people solved
Oct 29, 2023
Google logo
Google
Medium
Product Manager

Production volume planning for a phone-replacing device: from demand forecast to build

You have built a new kind of device intended to replace the mobile phone. Explain how you would decide how many units to manufacture: estimate the dem...

Product / Decision MakingEstimation & Market SizingOperations & Capacity
0
0
4 people solved
Feb 9, 2024
Meta logo
Meta
Medium
Product Manager

Instagram product design for a group of people the app serves poorly today

Choose a group of people that Instagram serves poorly today and design a new feature for them. Explain what you mean by under-served, why you picked t...

Product Design & StrategyProduct Design & ImprovementProduct Sense
0
0
6 people solved
May 29, 2024
Google logo
Google
Medium
Product Manager

Max Partnership Pricing: Valuing a Branded HBO Button on Roku's Remote

You are the product manager for Max, the streaming service from HBO. Roku wants to put a dedicated HBO button on its new remote control. How much shou...

Product / Decision MakingBusiness Case AnalysisEstimation & Market Sizing
0
0
3 people solved
Jun 18, 2025
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