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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 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
Capital One logo
Capital One
Medium
Data Scientist

Identify country with highest sunny-day probability

Write SQL to find the country with the highest probability that a day is sunny. Use the schema and sample data below. Rules: consider a day sunny for ...

Data Manipulation (SQL/Python)SQLProbability
13
1
110 people solved
Oct 13, 2025
Revolut logo
Revolut
Hard
Data Analyst

Find high-value crypto users and top CTR

You are given three tables. Assume all timestamps are stored in UTC. - users(user_id BIGINT PRIMARY KEY, create_date TIMESTAMP): one row per user acco...

Data Manipulation (SQL/Python)SQL
28
0
237 people solved
Feb 23, 2026
Airwallex logo
Airwallex
Medium
Data Scientist

Compute Moderation View Metrics

Question You are working on a content moderation analytics problem. You have two tables. Table 1: content_views (one row per user / post / day) - user...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
23
0
191 people solved
Nov 14, 2025
Yahoo logo
Yahoo
Easy
Data ScientistSenior+

Publisher CTR with App vs Web Split Compared to the Unweighted Publisher Average

A news portal records daily traffic for every article it shows on its homepage feed, and each article belongs to a publisher. Build a publisher-level ...

Data Manipulation (SQL/Python)SQL
0
0
1 people solved
Sep 6, 2026
Amazon logo
Amazon
Medium
Business Intelligence Engineer

Identify Most Popular First-Watched Movie in Viewing History

MOVIE_VIEWS +------------+--------------------+------------+ | customer_id| title | date | +------------+--------------------+-----...

Data Manipulation (SQL/Python)SQL
11
0
85 people solved
Jul 12, 2025
Capital One logo
Capital One
Medium
Data Scientist

Write SQL to find top net-revenue products

Using the sample schema and data below, write a single SQL query that returns, for the last 7 days relative to today (use today = 2025-09-01, so the w...

Data Manipulation (SQL/Python)SQL
7
0
97 people solved
Oct 13, 2025
Meta logo
Meta
Easy
Data Scientist Locked

Convert multi-currency revenue to USD totals

This question evaluates a candidate's competency in converting multi-currency revenue into USD totals by aligning event dates with FX rates, handling ...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
4
0
56 people solved
Feb 16, 2026
Meta logo
Meta
Hard
Data Scientist

Compute Heavy-Caller Percentages

You are given two tables that track voice calls and daily active users for a messaging app. Table: call_events - call_id BIGINT — unique call identifi...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
10
1
83 people solved
Jan 2, 2026
Yahoo logo
Yahoo
Easy
Data ScientistSenior+

Top 3 Articles by CTR in Each Feed Module with a 1,000-Impression Floor

A news portal's homepage is made of content modules, and a daily traffic table records how often each article was shown and clicked in each module on ...

Data Manipulation (SQL/Python)SQL
0
0
1 people solved
Sep 6, 2026
Amazon logo
Amazon
Medium
Software Engineer

Compute unique visitors per department from clicks

Given tables Products(product_id, department, category, subcategory) where department > category > subcategory form a hierarchy, and ClickLog(user_id,...

Data Manipulation (SQL/Python)SQL
8
0
85 people solved
Sep 6, 2025
Uber logo
Uber
Medium
Product Manager

Session Lengths by Country: Long-Session Average, 5-Minute Histogram, Similar Pairs

You have a table of user sessions with one row per session and two columns: | Column | Meaning | |---|---| | country | The user's country | | session_...

Data Manipulation (SQL/Python)SQLPandas & Python Data
0
0
7 people solved
Feb 17, 2025
ByteDance logo
ByteDance
Hard
Data Scientist

Daily Active Time per Advertiser with a One-Hour Session Gap Rule

An advertising platform records every action advertisers take in its ads-management tool in an event log. Compute each advertiser's daily active time ...

Data Manipulation (SQL/Python)SQL
0
0
1 people solved
Sep 7, 2026
Meta logo
Meta
Medium
Data Scientist

Calculate Total Revenue in USD Using SQL Query

ads_revenue +---------+------------+---------+----------+ | ad_id | country | revenue | currency | +---------+------------+---------+----------+ ...

Data Manipulation (SQL/Python)SQL
102
1
222 people solved
Aug 4, 2025
TikTok logo
TikTok
Medium
Data Scientist

Write SQL for geo posting-frequency drops

Using the schema below, write a single ANSI SQL query (window functions allowed) that identifies countries with the largest share of creators whose po...

Data Manipulation (SQL/Python)SQLMetric Diagnostics
14
0
118 people solved
Oct 13, 2025
Intuit logo
Intuit
Medium
Software Engineer Locked

Format VARCHAR amounts into $ with M/B suffix

This question evaluates a candidate's ability to perform SQL data manipulation tasks such as string-to-number conversion, conditional scaling and suff...

Software Engineering FundamentalsSQL
11
0
84 people solved
Feb 11, 2026
Yahoo logo
Yahoo
Easy
Data ScientistSenior+

Feed Module Impressions, Clicks and CTR on Web Platforms Over a 7-Day Window

A news portal's homepage is made of content modules, and a daily traffic table records how often each article was shown and clicked in each module on ...

Data Manipulation (SQL/Python)SQL
0
0
1 people solved
Sep 6, 2026
Amazon logo
Amazon
Medium
Data Scientist

Build DiD dataset with SQL

Using the schema and sample data below, write SQL to build an individual-day panel suitable for staggered-adoption DiD of the shuttle’s effect on part...

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

Query seven-day conversion with windows and dedupe

Assume all timestamps are UTC. Treat "today" as 2025-09-01. Define "last 7 days" as the inclusive window [2025-08-26 00:00:00, 2025-09-01 23:59:59]. S...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
4
0
69 people solved
Oct 13, 2025
ByteDance logo
ByteDance
Medium
Data Scientist

Video Watches by App and Country With a 30-Day Fraud-Session Country Ranking

A company that runs several video apps wants a report for today that shows, for every app and every country other than the United States, how many vid...

Data Manipulation (SQL/Python)SQL
0
0
1 people solved
Aug 24, 2026
Chime logo
Chime
Easy
Data Scientist

Compute early signals for user retention

You are given two tables that track signups and user transactions. Tables users - user_id (STRING, PK) — unique user - signup_ts (TIMESTAMP) — time th...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis
17
2
156 people solved
Nov 6, 2025
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