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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Coinbase logo
Coinbase
Medium
Software Engineer

Implement debounced autocomplete component

Implement debounced autocomplete component Implement an Autocomplete Input Component Context Build a reusable web UI component that provides typeahead...

Software Engineering FundamentalsUI Components & AccessibilityJavaScript & TypeScript
13
0
109 people solved
Aug 4, 2025
Oracle logo
Oracle
Medium
Software Engineer

Design a URL shortener: short-code generation, fast redirects and scaling

Design a URL shortening service. A user submits a long URL and receives a short link; anyone who opens the short link is redirected to the original UR...

System DesignSystem Design FundamentalsCaching
0
0
2 people solved
Aug 1, 2026
Riotgames logo
Riotgames
Easy
Software Engineer Locked

Describe a Difficult Project

Describe a recently completed difficult project, including the obstacle, decisions, and outcome.

Behavioral & Leadership
0
0
15 people solved
Aug 26, 2026
Expedia logo
Expedia
Hard
Data Scientist

Validate and monitor ranking model end-to-end

Expedia Hotel-Ranking Model: Evaluation, Metrics, Diagnostics, Rollout, and KPI Alignment Context: You are building a learning-to-rank (LTR) model to ...

Machine Learning
10
0
95 people solved
Oct 13, 2025
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Explain motivation and mission alignment

In a behavioral interview for a mission-driven tech company, you are asked two related questions: 1. Why do you want to join this company? 2. How does...

Behavioral & LeadershipMotivation & Fit
37
0
285 people solved
Oct 20, 2025
Snapchat logo
Snapchat
Hard
Software Engineer Locked

Implement a search autocomplete suggestion service

This question evaluates proficiency in designing efficient prefix-matching and ranking mechanisms, including management of incremental query state and...

Coding & AlgorithmsData Structure DesignSorting
13
0
106 people solved
Feb 11, 2026
Sealth logo
Sealth
Medium
Software Engineer Locked

Simulate Threshold Grid Infection

This question evaluates understanding of discrete grid-based simulations and local state-transition rules, focusing on modeling infection spread, neig...

Coding & Algorithms
5
0
39 people solved
Mar 13, 2026
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
21
0
261 people solved
Sep 6, 2025
Block (Square) logo
Block (Square)
Medium
Data Scientist

Write left-join queries with tricky filters

Assume 'today' = '2025-09-01'. Do NOT use window functions (e.g., RANK). Use LEFT JOIN, COUNT(DISTINCT), GROUP BY, HAVING as appropriate. Schema: - us...

Data Manipulation (SQL/Python)SQL
6
0
99 people solved
Oct 13, 2025
Experian logo
Experian
Medium
Data Scientist

Sort and Rearrange: Efficient Algorithms for Diverse Challenges

Sort and Rearrange: Efficient Algorithms for Diverse Challenges Scenario Coding rounds and infrastructure-style algorithm questions. Question Write an...

Coding & Algorithms
3
0
65 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Software Engineer

Design a ticket or hotel reservation system

Design a reservation system (Ticketmaster-style event seats or hotel rooms). Requirements: - Users search availability by date/event. - Users select s...

System Design
3
0
55 people solved
Feb 25, 2026
Meta logo
Meta
Medium
Data Engineer

Define success metrics for a social feed

Define Success Metrics for a Social Feed Feature You are evaluating a change to the main social feed in a large-scale consumer app. Assume events are ...

Analytics & Experimentation
10
0
83 people solved
Sep 6, 2025
Roku logo
Roku
Easy
Data Scientist

Explain Bias-Variance Trade-off Simply for Stakeholders

Explain the Bias-Variance Trade-off Simply for Stakeholders You are in a data scientist interview and need to explain a core modeling concept to a non...

Statistics & Math
8
0
70 people solved
Jul 12, 2025
ByteDance logo
ByteDance
Medium
Data Scientist

How would you choose a classification threshold?

You trained a binary classifier that outputs a probability score p(y=1|x). You must choose a decision threshold t to convert probabilities into class ...

Machine Learning
10
0
73 people solved
Nov 12, 2025
Instacart logo
Instacart
Easy
Data Scientist

How would you investigate a metric decline?

Scenario You are a Data Scientist supporting a consumer marketplace product. A key business metric (e.g., orders/day, conversion rate, revenue, profit...

Analytics & ExperimentationMetric DiagnosticsSegmentation & Cohort Analysis
22
0
160 people solved
Feb 6, 2026
Salesforce logo
Salesforce
Medium
Software Engineer

Explain background and Salesforce motivation

Explain background and Salesforce motivation Behavioral: Background, Motivation, and Team Fit (Salesforce, GCP-Focused) Prompt Provide a concise, stru...

Behavioral & LeadershipMotivation & FitProject Deep Dive
17
0
130 people solved
Jul 31, 2025
Roku logo
Roku
Medium
Data Scientist

Write SQL for profit, growth, retention

Write ANSI-SQL (PostgreSQL preferred) for the tasks below. Assume all timestamps are UTC and that "today" = 2025-09-01. Schema: - products(product_id ...

Data Manipulation (SQL/Python)SQLBusiness Case Analysis
9
0
146 people solved
Oct 13, 2025
Visa logo
Visa
Medium
Data Scientist

Compute Total Spent in 2023 Excluding Refunds

transactions +----------------+---------+-------------+--------+------------------+ | transaction_id | user_id | merchant_id | amount | transaction_da...

Data Manipulation (SQL/Python)
2
0
34 people solved
Aug 4, 2025
Amazon logo
Amazon
Hard
Data Scientist

Design an operations dashboard with justifications

Design an Operations Dashboard for Same-Day Delivery Station Performance Goal Create a real-time dashboard for a delivery-station manager to monitor a...

Analytics & Experimentation
8
0
62 people solved
Oct 13, 2025
Tools For Humanity logo
Tools For Humanity
Easy
Data Scientist

Compute reply-based engagement metrics

You work on a microblogging app (Twitter-like). Posts and replies are stored in the tables below. Tables all_post - post_id BIGINT PK - post_author_id...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
4
0
59 people solved
Aug 29, 2025
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