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

Revolut

Easy

Data Scientist

Define Ultra success metrics and detect suspicious transactions

You work on a fintech product with these existing tables (UTC timestamps). You may only use these tables/columns; if a metric cannot be measured direc...

Analytics & ExperimentationMetrics & KPIsSQL

346 people solved

Feb 4, 2026

GoogleAmazonBloomberg

Medium

Software Engineer

Count All Three Salary Categories Including Empty Ones

Problem Return category and accounts_count for all three source categories: Low Salary for income < 20000, Average Salary for 20000 through 50000 incl...

Data Manipulation (SQL/Python)SQL

Find Payroll Bookings in the Latest Active Month by Country

Practice PostgreSQL date logic by finding the latest active payroll-booking month and aggregating amounts by headquarters country. The task tests prec...

Data Manipulation (SQL/Python)SQL

Calculate Order Request Metrics

You are working with DoorDash order and delivery-request data. Write SQL to answer the questions below. Tables: 1. orders - order_id BIGINT, primary k...

Data Manipulation (SQL/Python)SQLMetrics & KPIs

Compute Ride Metrics in SQL

You are given two tables for a ride-hailing product. Tables: - users: one row per registered user. - user_id BIGINT PRIMARY KEY - city VARCHAR NOT...

Data Manipulation (SQL/Python)SQLMetrics & KPIs

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

791 people solved

Oct 13, 2025

AmazonBloombergGoogle

Easy

Software Engineer

Calculate Contest Registration Percentages with the Source Tie Order

Problem For each contest present in Register, report contest_id and percentage of all Users registered in it, rounded to two decimal places. Sort perc...

Data Manipulation (SQL/Python)SQL

Write SQL for call analytics

You are given two tables. Table: calls - call_id BIGINT - sender_id BIGINT - receiver_id BIGINT - call_ts TIMESTAMP — stored in UTC - pickup CHAR(1) —...

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

Solve SQL and Python coding tasks

You are given a small library system with the following relational schema and several Python data-processing tasks. Answer the SQL questions and imple...

Coding & AlgorithmsSQLDynamic Programming

Write SQL and Python for transaction analytics

You are given user and transaction data. Part A (SQL): Use a join and window functions to answer the prompts below using the following schema and samp...

Data Manipulation (SQL/Python)SQL

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

Filter Odd-ID Movies and Preserve Rating Order

Problem Report Cinema rows with an odd id and description different from boring. Sort by rating descending. The source supplies no rule for ordering m...

Data Manipulation (SQL/Python)SQL

Compute DAU and rolling MAU with zero days

You have two tables in PostgreSQL: Tables users - user_id (STRING / INT, PK) - signup_date (DATE) logins - user_id (STRING / INT, FK → users.user_id) ...

Data Manipulation (SQL/Python)Metrics & KPIsSQL

131 people solved

Nov 10, 2025

GoogleAmazonBloomberg

Medium

Software Engineer

Count Every User’s Buyer Orders during 2019

Problem Return buyer_id, join_date and orders_in_2019 for every Users row. Count only orders made by that user as buyer during calendar year 2019, inc...

Data Manipulation (SQL/Python)SQL

Write SQL for Pixel Signal Metrics

You are working on Meta Ads Pixel analytics. Assume all timestamps are stored in UTC, and analyze the last 30 complete calendar days. Tables 1. advert...

Data Manipulation (SQL/Python)SQLMetrics & KPIs

Data Scientist Locked

Handle repeated churn in SQL

This question evaluates proficiency in time-based data manipulation and analytics, including handling repeated churn and resubscription, interval logi...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis

Find the Highest-Paid Employee in Each Department

The interview report explicitly identified the “Department Highest Salary” SQL exercise. Use the following self-contained PostgreSQL schema: `text dep...

Data Manipulation (SQL/Python)SQL

49 people solved

Easy

Data ScientistSenior+

Count Members Flagged for Three Violations in 90 Days, Overall and by Violation Type

A trust-and-safety team logs every harmful-content violation committed by a member. It is comparing two rules for flagging repeat violators and wants ...

Data Manipulation (SQL/Python)SQL

Calculate Cohort Retention

You are given two tables: users - user_id BIGINT PRIMARY KEY - signup_ts TIMESTAMP user_events - user_id BIGINT - event_ts TIMESTAMP - event_name VARC...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis

326 people solved

Feb 23, 2026

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Tech Interview Questions

Define Ultra success metrics and detect suspicious transactions

Count All Three Salary Categories Including Empty Ones

Find Payroll Bookings in the Latest Active Month by Country

Calculate Order Request Metrics

Compute Ride Metrics in SQL

Write SQL for video-call recipients and FR activity

Calculate Contest Registration Percentages with the Source Tie Order

Write SQL for call analytics

Count weekly customers with ≥$1000 YTD spend

Solve SQL and Python coding tasks

Write SQL and Python for transaction analytics

Write left-join queries with tricky filters

Filter Odd-ID Movies and Preserve Rating Order

Compute DAU and rolling MAU with zero days

Count Every User’s Buyer Orders during 2019

Write SQL for Pixel Signal Metrics

Handle repeated churn in SQL

Find the Highest-Paid Employee in Each Department

Count Members Flagged for Three Violations in 90 Days, Overall and by Violation Type

Calculate Cohort Retention

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