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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
Apple logo
Apple
Medium
Software Engineer

Refactor rock–paper–scissors for config and ties

Refactor an existing Rock–Paper–Scissors tournament with three robot players so that the number of rounds is configurable and the system also tracks t...

Coding & AlgorithmsLow-Level Design (OOP)Code Quality & Maintainability
10
0
176 people solved
Sep 6, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Write windowed retention and ARPU SQL

You are given three tables. Write one SQL script (CTEs allowed) that answers all parts using window functions and joins (no procedural loops): Schema:...

Data Manipulation (SQL/Python)
4
0
50 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Software EngineerSenior+

Design Food Ratings and Driver Payouts

Design the backend for a food-delivery product (think DoorDash-style marketplace). The system has two distinct surfaces that you must address together...

System DesignConsistency & AvailabilityPayments & Ledgers
66
0
457 people solved
Feb 3, 2026
Resolve.Ai logo
Resolve.Ai
Medium
Software Engineer AI Locked

Design a Weighted Log Distributor

This question evaluates distributed systems architecture, load-balancing and traffic-routing competencies, along with fault tolerance, backpressure ha...

System Design
9
0
71 people solved
May 20, 2026
Rippling logo
Rippling
Medium
Software Engineer

What was the hardest part of your project?

Behavioral question In a project deep dive, the interviewer asks: 1) “In this project, what was the hardest part (most challenging aspect) and why?” 2...

Behavioral & LeadershipProject Deep DiveFailure & Learning
19
0
154 people solved
Oct 17, 2025
Microsoft logo
Microsoft
Hard
Data Scientist

Implement robust k-means from scratch

Implement K-Means Clustering From Scratch (Production-Ready) Context You are asked to implement K-Means clustering from scratch for a machine learning...

Machine Learning
7
0
94 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Market a new AI technique

Market a new AI technique Context You are a software engineer introducing a new technique and planning a public blog post to drive developer adoption....

System Design
4
0
79 people solved
Aug 4, 2025
Snowflake logo
Snowflake
Hard
Software Engineer

Implement course scheduling and rate limiter analysis

You are given two independent coding problems. --- Problem 1: Course Scheduling You are planning to take a set of courses and are given prerequisite r...

Coding & AlgorithmsGraphsTwo Pointers & Sliding Window
22
0
293 people solved
Nov 22, 2025
Apple logo
Apple
Medium
Data Scientist

Find Smallest Missing Positive Integer in O(n) Time

Scenario LeetCode-style algorithm phone interview Question Implement a function that returns the smallest missing positive integer in an unsorted inte...

Coding & Algorithms
6
0
81 people solved
Aug 4, 2025
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Explain Core ML Concepts

Answer these machine-learning fundamentals questions: 1. Explain the difference between batch normalization and layer normalization, including how eac...

Machine Learning
3
0
59 people solved
Jun 28, 2025
Meta logo
Meta
Medium
Site Reliability Engineer Locked

Implement a Streaming VMStat Alert

This question evaluates streaming data processing skills, sliding-window counting algorithms, and efficient online state management for metric monitor...

Coding & AlgorithmsObservabilityStacks & Queues
7
0
100 people solved
Apr 6, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Flag Fraudulent Transactions by Amount and Travel Time

Flag transactions that exceed a strict amount threshold or conflict with a same-account transaction at another location within 60 minutes. The prompt ...

Coding & Algorithms
7
0
49 people solved
May 12, 2026
Point72 logo
Point72
Hard
Data Scientist

Price a coin-doubling game rationally

Coin-Doubling (St. Petersburg) Game: EV, Log-Utility Pricing, Kelly Staking, and House Cap Context and assumptions - Single play: You buy one ticket t...

Statistics & MathProbabilityPuzzles & Brainteasers
8
0
102 people solved
Oct 13, 2025
Snowflake logo
Snowflake
Medium
Frontend Engineer Locked

Implement an event emitter

This question evaluates understanding of event-driven programming and API design in a frontend environment, specifically the ability to manage event l...

Coding & AlgorithmsJavaScript & TypeScriptData Structure Design
5
0
102 people solved
Jan 11, 2026
Capital One logo
Capital One
Hard
Data Scientist

Design and analyze an SBA mini case experiment

Design a 2‑Week Experiment: $100 Credit After ID Verification You are designing a 2‑week pilot in which new accounts receive a $100 credit after ident...

Analytics & Experimentation
6
0
70 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software Engineer

Describe a failed project and lessons learned

Describe a project you worked on that ultimately failed or did not meet its goals. Explain: - What the project was trying to achieve and your role. - ...

Behavioral & Leadership
3
0
47 people solved
Dec 8, 2025
Meta logo
Meta
Medium
Data Scientist

Resolve Team Conflicts to Improve Delivery Efficiency

Behavioral Interview: Resolve Team Conflict and Improve Delivery You are in a Behavioral and Leadership interview for a Data Scientist role. The inter...

Behavioral & Leadership
34
0
127 people solved
Jul 12, 2025
Google logo
Google
Medium
Software Engineer

Explain handling a tight project deadline

In a behavioral interview for a software engineering or technical role, you are asked: > Describe a time you had to work under a very tight deadline. ...

Behavioral & Leadership
4
0
61 people solved
Dec 8, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze Recent Calling Behavior in France Using SQL

CALLS +---------+---------+---------------------+-------------------+----------+ | call_id | user_id | call_start_time | participant_cnt | is_vi...

Data Manipulation (SQL/Python)
70
0
203 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Calculate Monthly Revenue from Orders in 2023

orders | id | order_date | customer | |----|------------|----------| | 1 | 2023-01-03 | 101 | | 2 | 2023-02-14 | 102 | | 3 | 2023-02-20 | 101 | ​ o...

Data Manipulation (SQL/Python)
5
0
43 people solved
Aug 4, 2025
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