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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
Google logo
GoogleMetaMicrosoft

Also asked at Microsoft, Amazon, Accenture, Bloomberg, TCS, Meesho

Medium
Software Engineer

Find Values Repeated in Three Consecutive Log Rows

Problem Report each num that appears in at least three consecutive Logs rows in id order. The source id is an auto-increment key starting at 1. Name t...

Data Manipulation (SQL/Python)SQL
1
0
16 people solved
Airwallex logo
Airwallex
Medium
Backend Engineer

Design a Hotel Booking Platform Down to the SQL Tables and Booking Transaction

Design an online hotel booking platform. Travelers search for hotels in a destination for a check-in date, a check-out date and a number of guests, co...

System DesignSystem Design FundamentalsTransactions & Isolation
3
0
32 people solved
Sep 16, 2026
Google logo
GoogleMicrosoftCognizant

Also asked at Cognizant, Amazon, Meta, Bloomberg, Accenture

Medium
Software Engineer

Assign Consecutive Dense Ranks to Decimal Scores

Problem For each Scores row, report score and its rank: larger scores come first, ties share a rank, and the next different score receives the next in...

Data Manipulation (SQL/Python)SQL
1
1
18 people solved
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Meta, Bloomberg, Cognizant, TCS

Easy
Software Engineer

Keep Every Person When Attaching Address Details

Problem Report firstName, lastName, city and state for every Person. Match addresses by personId; where no address matches, city and state must be NUL...

Data Manipulation (SQL/Python)SQL
1
0
13 people solved
Airbnb logo
Airbnb
Medium
Data Engineer Locked

Model Cumulative Booking Metrics and First and Last Booking Times

Model booking facts and cumulative summaries to report first and last bookings, with historical snapshots, late data, and dimension changes.

System DesignDimensional Modeling
7
0
54 people solved
Sep 4, 2026
Verisk logo
Verisk
Easy
Data ScientistIntern

Companies Whose Average Employee Salary Is Above 40,000

A company directory keeps its employees, companies and salaries in three tables. Write a query that returns the name of every company whose employees'...

Data Manipulation (SQL/Python)SQL
0
0
2 people solved
Nov 12, 2026
Amazon logo
AmazonGoogleMeta

Also asked at Meta, Bloomberg, Infosys, Microsoft, Meesho, Deloitte, Walmart Labs, Cognizant, Fractal Analytics

Easy
Software Engineer

Find Days Warmer Than Their Actual Previous Calendar Day

Problem Return the id of each Weather row whose temperature exceeds the temperature on the immediately preceding calendar date. A previous stored row ...

Data Manipulation (SQL/Python)SQL
1
0
10 people solved
Amazon logo
AmazonDeloitteGoogle

Also asked at Google, Microsoft, Bloomberg, Meta, Atlassian, Cognizant

Medium
Software Engineer

Create a Function for a Requested Distinct Salary Rank

Problem Implement getNthHighestSalary(N INT), returning an integer salary from Employee. Given a positive integer N, return the Nth-largest distinct k...

Data Manipulation (SQL/Python)SQL
0
0
11 people solved
Instacart logo
Instacart
Medium
Software Engineer Locked

Add Backend Search and Filters to the Items API of a Library Lending System

A full-stack software engineering exercise that extends the items API of an existing library lending system with case-insensitive title search plus it...

Software Engineering FundamentalsAPI DesignAI-Assisted Development
7
0
92 people solved
Sep 3, 2026
Mixpanel logo
Mixpanel
Medium
Data Scientist

Aggregate User Events and Check Join Uniqueness

Build a User Activity Summary from Event Data You have two tables. The intended user summary contains one row per user_id, and the users table provide...

Data Manipulation (SQL/Python)SQL
6
0
49 people solved
Sep 9, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Calculate Daily Survey Response Rates by Country

Work through a PostgreSQL survey-analysis task that compares impressions and responses by date and country. It exercises careful joins, distinct-user ...

Data Manipulation (SQL/Python)SQL
52
9
620 people solved
Jul 6, 2026
Intuit logo
Intuit
Medium
Machine Learning Engineer Locked

Longest Meeting-Free Business-Hours Block per Employee and Day

Find each employee’s longest meeting-free business-hours interval using clipped attendance, merged overlaps, complete day coverage, and SQL window log...

Data Manipulation (SQL/Python)SQLIntervals & Scheduling
7
0
76 people solved
Sep 6, 2026
Google logo
GoogleMetaAmazon

Also asked at Amazon, Microsoft, Bloomberg, TCS, Accenture, IBM, Yandex, Cognizant

Easy
Software Engineer

Report Employees Whose Pay Exceeds Their Manager’s

Problem Find each employee whose salary is strictly greater than the salary of the manager identified by managerId. Return the employee name in a colu...

Data Manipulation (SQL/Python)SQL
1
0
11 people solved
Stripe logo
Stripe
Medium
Software Engineer Locked

Find the Latest Balance for a Bank Account

Query the latest dated bank-account balance using both bank and account identifiers while handling records across months and years.

Data Manipulation (SQL/Python)SQL
7
0
136 people solved
Aug 31, 2026
Waymo logo
Waymo
Medium
Business Intelligence Engineer Locked

SQL: Top 5 Vehicle Models by Miles per kWh Under a Maintenance Cost Cap

Write a PostgreSQL query returning the top 5 vehicle models by miles per kWh, limited to models with total maintenance cost under 5000 and safe when e...

Data Manipulation (SQL/Python)SQL
14
1
120 people solved
Sep 10, 2026
Amazon logo
AmazonBloombergGoogleMicrosoft

Also asked at Google, Microsoft

Easy
Software Engineer

Find the Unique Customer with the Most Orders

Problem Return customer_number for the customer with the greatest number of Orders rows. The source guarantees exactly one customer has a strictly lar...

Data Manipulation (SQL/Python)SQL
1
0
13 people solved
Mixpanel logo
Mixpanel
Medium
Data Scientist

Count Users Active After Signup

Count Users with an Event On or After Signup You have these tables: | Table | Column | Meaning | |---|---|---| | users | user_id | User identifier. | ...

Data Manipulation (SQL/Python)SQL
5
1
39 people solved
Sep 14, 2026
Airbnb logo
Airbnb
Medium
Data Engineer Locked

Find Hosts Meeting Listing, Rating, and Review-Coverage Rules

Find qualifying hosts with SQL using listing counts, a supplied rating cutoff, and exact recent-review coverage across their listings.

Data Manipulation (SQL/Python)SQL
10
0
79 people solved
Sep 4, 2026
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Bloomberg, Meta, Deloitte, TCS

Medium
Software Engineer

Find Managers with Five or More Direct Reports

Problem Report the name of every manager who has at least five employees directly referencing that manager’s id. Count direct reports across all depar...

Data Manipulation (SQL/Python)SQL
1
0
12 people solved
Engelhart logo
Engelhart
Medium
Software Engineer

Relational Database Indexes: Read/Write Trade-offs and Tuning a Slow SQL Query

Explain what a relational database index is and how it affects reads and writes, then describe how you would troubleshoot and tune a complex SQL query...

Software Engineering FundamentalsIndexing & Query PerformanceDatabase Internals
1
0
17 people solved
Sep 19, 2026
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