Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

383

Companies

980

Updated

11.12.2026

383 Questions 980 Companies11.12.2026

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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Roblox

Easy

Data ScientistSenior+

Write SQL for influence score and follower growth

You are working on a social product with these tables: Tables / Schemas users - user_id BIGINT (PK) - created_at TIMESTAMP posts - post_id BIGINT (PK)...

Data Manipulation (SQL/Python)SQL

238 people solved

Dec 11, 2025

AmazonGoogleMicrosoft

Easy

Software Engineer

Return the Marked Primary Department or an Employee’s Sole Department

Problem Return employee_id and department_id for each employee’s primary department. Employees in several departments have exactly one row marked Y. R...

Data Manipulation (SQL/Python)SQL

Count weekly customers with ≥$1000 YTD spend

Question You are given a transaction-level table and must compute a weekly time series of how many customers have reached a year-to-date spending thre...

Data Manipulation (SQL/Python)SQLPandas & Python Data

Analyze video flags and reviews with SQL

You are designing SQL queries for YouTube Trust & Safety. Use the schema and sample data below. Unless stated otherwise, treat a flag as reviewed if t...

Data Manipulation (SQL/Python)SQL

Find users with multi-country successful logins

Given a table login_attempts with columns: user_id (TEXT), timestamp (TIMESTAMP), status (TEXT), and country (TEXT), write an SQL query to return the ...

Data Manipulation (SQL/Python)SQL

Machine Learning Engineer Locked

Query Top Played Tracks Globally And By Country

Practice SQL for music playback analytics by finding top tracks globally and top tracks per country from event logs. The prompt targets aggregation, w...

Data Manipulation (SQL/Python)SQL

Retrieve First Active and Last Inactive Dates per User

Given a table activity that tracks user activities, write a SQL query to retrieve the first active date and last inactive date for each user. Table Sc...

Data Manipulation (SQL/Python)SQL

Daily Active Users per App Excluding US Activity and Fraudulent Users

A company that runs several video apps wants today's daily active users (DAU) for each of its apps, excluding activity in the United States and counti...

Data Manipulation (SQL/Python)SQL

Analyze DoorDash Orders: High-Frequency Customers, Top Spenders, MoM Sales & Bottom-Percentile Reach

Data Manipulation (SQL/Python)SQL

Write SQL for video-call recipients and FR activity

Given the schema and samples below, write ANSI‑SQL to answer both questions. Assume dates are stored in UTC. Today is 2025-09-01, so “yesterday” is 20...

Data Manipulation (SQL/Python)SQL

Decide and experiment on Group Call feature

Assume today is 2025-09-01. You have only one table, calls_daily_agg(date, user_id, country, device_tier, one_to_one_calls_started, one_to_one_call_du...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs

364 people solved

Oct 13, 2025

AmazonMicrosoftGoogle

Easy

Software Engineer

Report Classes with at Least Five Enrolled Students

Problem Return each class with at least five students enrolled. The (student,class) key prevents duplicate enrollment rows for the same student in one...

Data Manipulation (SQL/Python)SQL

Count and Lexicographically Join Distinct Products Sold per Date

Problem For each sell_date, report num_sold as the count of different product names and products as those distinct names joined by commas in lexicogra...

Data Manipulation (SQL/Python)SQL

8 people solved

Shopify

Medium

Data ScientistSenior+ AI Locked

Analyze Pirated Theme Usage

This question evaluates competency in temporal data manipulation, interval-overlap logic, aggregations and joins to calculate monthly usage metrics an...

Data Manipulation (SQL/Python)SQLMetrics & KPIs

Aggregate D1 retention cohorts in SQL

Today is 2025-09-01. Using SQL (optionally outline a pandas approach too), compute daily engagement and D1 retention for the last 7 days (2025-08-26 t...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis

Model entities for feed content and shares

Scenario You are designing the data model for a social app’s News Feed that shows multiple content types (text, image, short video). Users can interac...

System DesignDimensional Modeling

Data ScientistSenior+ Locked

Find Top-5 Similar Rows

This question evaluates pairwise similarity matching, numerical feature comparison using mean squared error, null-value exclusion, and deterministic t...

Data Manipulation (SQL/Python)SQLPandas & Python Data

Build panel in SQL; run causal regression

Assume today is 2025-09-01 (UTC). Schema and small samples: users(user_id INT, country STRING, signup_date DATE, platform STRING) Sample: user_id | co...

Data Manipulation (SQL/Python)Causal InferenceSQL

152 people solved

Oct 13, 2025

AmazonGoogleBloomberg

Medium

Software Engineer

Return All Sales in Each Product’s Earliest Year

Problem For each product_id, find the first year present in Sales and return every sales entry for that product in that year. Output product_id, first...

Data Manipulation (SQL/Python)SQL

Write queries for follows and bookings

This question evaluates the ability to manipulate temporal event logs, enforce bidirectional relational integrity, and implement efficient graph and i...

Coding & AlgorithmsSQLIntervals & Scheduling

207 people solved

Mar 1, 2026

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Tech Interview Questions

Write SQL for influence score and follower growth

Return the Marked Primary Department or an Employee’s Sole Department

Count weekly customers with ≥$1000 YTD spend

Analyze video flags and reviews with SQL

Find users with multi-country successful logins

Query Top Played Tracks Globally And By Country

Retrieve First Active and Last Inactive Dates per User

Daily Active Users per App Excluding US Activity and Fraudulent Users

Analyze DoorDash Orders: High-Frequency Customers, Top Spenders, MoM Sales & Bottom-Percentile Reach

Write SQL for video-call recipients and FR activity

Decide and experiment on Group Call feature

Report Classes with at Least Five Enrolled Students

Count and Lexicographically Join Distinct Products Sold per Date

Analyze Pirated Theme Usage

Aggregate D1 retention cohorts in SQL

Model entities for feed content and shares

Find Top-5 Similar Rows

Build panel in SQL; run causal regression

Return All Sales in Each Product’s Earliest Year

Write queries for follows and bookings

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