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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
Akuna Capital logo
Akuna Capital
Medium
Data Engineer Locked

Compute Graph Spread and Portfolio Trades

This question evaluates graph traversal and data-manipulation competencies, combining connected-component analysis on undirected graphs with map-based...

Coding & Algorithms
2
0
20 people solved
May 11, 2026
Amazon logo
Amazon
Hard
Software Engineer

Optimize attention for long sequences

Optimize attention for long sequences System Design: Efficient Attention for Long Sequences Context You are designing or optimizing sequence models th...

ML System Design
5
0
52 people solved
Jul 15, 2025
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
253 people solved
Jul 28, 2025
Salesforce logo
Salesforce
Hard
Software Engineer

Design cloud & k8s architecture

Design cloud & k8s architecture Technical Screen: Kubernetes, Cloud Services, and Secure CI/CD Context You are designing and operating services on Kub...

System DesignContainers & OrchestrationCI/CD & Deployment
30
0
104 people solved
Aug 4, 2025
ByteDance logo
ByteDance
Medium
Data ScientistIntern

Count Same-Day Registered Posters

You are given two tables: `text users - user_id: unique identifier for a user - registered_at: timestamp when the user registered posts - post_id: uni...

Coding & Algorithms
2
0
15 people solved
Mar 14, 2026
Shopify logo
Shopify
Medium
Machine Learning Engineer

Implement an interactive CLI class with tests

Design and implement a command-line interactive application as a single class using OOP principles. The program should support commands: add <key> <va...

Coding & AlgorithmsLow-Level Design (OOP)Testing & Quality
15
0
262 people solved
Aug 13, 2025
Meta logo
Meta
Hard
Data Scientist

Design Experiment to Measure Shopping Feature Impact

Experiment Design: Measure Instagram Shopping Impact Instagram is launching an in-app Shopping feature, such as product tags, shop surfaces, or in-app...

Analytics & Experimentation
13
0
84 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Probabilities for Mixed Reviewer Types

Probabilities for Mixed Reviewer Types Two types of reviewers exist in a marketplace: - Lazy reviewers are 20% of reviewers and always give good revie...

Statistics & Math
85
0
235 people solved
Jul 12, 2025
Capital One logo
Capital One
Medium
Data Scientist

Explain Python Virtual Environment Setup and Function Analysis

Scenario Technical screen where candidate and interviewer jointly walk through Python code snippets used in a data-science repository. Question Show h...

Coding & Algorithms
58
0
25 people solved
Jul 12, 2025
Render logo
Render
Medium
Software Engineer

Count Blocked Rate-Limited Requests

You are given an in-memory request log for a web platform. Each log entry has: - timestamp: an ISO-8601 UTC timestamp - request_ip: the client IPv4 ad...

Coding & Algorithms
10
0
81 people solved
Feb 26, 2026
TikTok logo
TikTok
Medium
Data Scientist

Choose linear regression or decision tree appropriately

Choose Between Linear Regression and a Decision Tree Under a Hinge and Interaction DGP Context You have 100,000 i.i.d. observations with features x1 (...

Machine Learning
5
0
64 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Estimate Fake Accounts Using Data Signals and Sampling

Estimate Fake Accounts Using Data Signals and Sampling Estimating Fake Accounts on a Social Network Background A large social platform wants to estima...

Analytics & Experimentation
7
0
57 people solved
Aug 4, 2025
TikTok logo
TikTok
Medium
Software Engineer

Segment a message with width-constrained suffixes

Given a message string s and an integer width W, split s into consecutive segments and append a suffix "i/n" to each segment indicating its 1-indexed ...

Coding & Algorithms
6
0
57 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Data Scientist

Analyze User Engagement with SQL Queries

events +----------+---------+---------------------+ | event_id | user_id | event_time | +----------+---------+---------------------+ | 1 ...

Data Manipulation (SQL/Python)
107
0
298 people solved
Aug 4, 2025
Meta logo
Meta
Hard
Data Scientist

Diagnose rising account switching and falling actives

Diagnostic Plan: Account Switching Up, Active Users Down Context You observed a sudden pattern: the number of users switching accounts increased, whil...

Analytics & Experimentation
4
0
37 people solved
Oct 13, 2025
Bitkernel logo
Bitkernel
Medium
Software Engineer

Identify incorrect HTTP status code description

Which of the following descriptions about HTTP status codes is incorrect? Options: - A. 100 means the client should continue sending the request. - B....

Software Engineering Fundamentals
6
0
56 people solved
Oct 24, 2025
Capital One logo
Capital One
Medium
Data Scientist

Write SQL for theme-park revenue and visits

You are given theme-park ticketing and visits data. Write SQL to answer the following, using the sample schema and tables below. Return both the query...

Data Manipulation (SQL/Python)
2
0
25 people solved
Oct 13, 2025
Amperity logo
Amperity
Medium
Software Engineer

Render Overlapping Rectangles on an ASCII Canvas

Render Overlapping Rectangles on an ASCII Canvas Implement render_canvas(width, height, rectangles). The canvas initially contains spaces and is retur...

Coding & Algorithms
2
0
23 people solved
Apr 7, 2026
Lyft logo
Lyft
Medium
Data Scientist

Assess Cultural Fit Through Behavioral Interview Questions

Assess Cultural Fit Through Behavioral Interview Questions Onsite Behavioral & Leadership Interview — Data Scientist Scenario - 1-on-1 conversation wi...

Behavioral & LeadershipLeadership & InfluenceFailure & Learning
26
0
97 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Data Scientist

Diagnose Bias–Variance Trade-off in Supervised Learning

Diagnose Bias–Variance Trade-off in Supervised Learning Supervised Learning Review (Customer-Facing Ranking Context) You are designing and evaluating ...

Machine LearningML FundamentalsProbability
57
0
221 people solved
Aug 4, 2025
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