Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

18.6k

Companies

980

Updated

11.12.2026

18.6k 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

Jane Street

Medium

Frontend Engineer

Field Layout: getOffset and insert

An object's binary layout is defined by an ordered list of fields. Each field has a unique name and a size in bytes. Fields are packed contiguously st...

Aggregate video time and unique pins in Python

Part A (category by average time for videos): You receive a list of pin engagement rows and a category map. pins = [ {"pin_id": 10, "category_id": 1,...

Data Manipulation (SQL/Python)

Software EngineerNew Grad

Explain Encapsulation through an Object Invariant

What is data encapsulation in Java, and how does it help keep an object valid? Give a concrete example rather than only listing private fields, getter...

Software Engineering FundamentalsProgramming LanguagesCode Quality & Maintainability

Adobe feature that lets people with no design training make polished visuals

You are a product manager at Adobe. Plenty of people who are not designers still have to produce visuals, such as social posts, flyers, presentations ...

Product Design & StrategyProduct SenseAI Product Management

Find the Latest Unoccupied Arrival Time That Still Boards a Bus

Problem Buses depart at the distinct times in buses, each taking at most capacity waiting passengers in increasing arrival-time order. Existing distin...

Coding & AlgorithmsTwo Pointers & Sliding WindowSimulation & State Machines

8 people solved

Longest Balanced Substring in a String of Parentheses

Reported from a Meta software engineering coding round. You are given a string s that contains only the characters ( and ). A string is balanced if it...

Coding & AlgorithmsStacks & QueuesDynamic Programming

Software EngineerIntern

Clarify and Find Common Ancestors in a Graph

Explain how you would find common ancestors in a graph. Begin by clarifying the edge direction, graph structure, queried vertices, and whether the res...

Software Engineering FundamentalsGraphs

Round numeric string values

Question Given a numeric string, implement rounding to the nearest integer (e.g., '3.5' → '4', '100.01' → '100'). Follow-up: round to the last signifi...

Implement a leaky-bucket rate limiter

Implement a leaky-bucket rate limiter Implement a Leaky-Bucket Rate Limiter with Tests and Distributed Design Context and Assumptions - Implement in a...

Coding & AlgorithmsRate LimitingConcurrency

Software Engineer Locked

Return the First Non-Repeating Character

Return the first character whose total frequency is one, preserving input order and defining the result when every character repeats.

Coding & AlgorithmsArrays & Strings

Machine Learning EngineerIntern

Find pairs with the minimum absolute difference

Given an integer array (not necessarily sorted), find the minimum absolute difference between any two distinct elements. Return all pairs of values th...

Coding & AlgorithmsSorting

Software Engineer Locked

Design an Uber Eats Cart Service

This question evaluates a candidate's ability to design a distributed shopping-cart service for a food-delivery platform, testing competencies in syst...

System DesignSystem Design FundamentalsConsistency & Availability

Check Whether the Middle Value Is Unique

Check Whether the Middle Value Is Unique You are given an integer array nums of odd length. Return true if the value at its middle position appears ex...

Coding & AlgorithmsArrays & Strings

10 people solved

Medium

Data Scientist

Determine Appropriate Statistical Test for Comparing Means

Statistical Test for Comparing Mean Active Minutes You have two weeks of experiment data for a new algorithm. The primary metric is user active minute...

Statistics & MathHypothesis TestingExperiment Analysis & Readout

Software Engineer Locked

Search a Folder Hierarchy with Extensible Document Filters

Search a folder hierarchy with strict size and optional type filters, deterministic traversal, extensible predicate composition, and meaningful bounda...

Coding & AlgorithmsTreesCode Quality & Maintainability

Find exit URL via BFS API calls

Question Design and implement a function that, given a starting URL "/", performs BFS or DFS by repeatedly sending HTTP GET requests of the form GET "...

Software EngineerNew Grad Locked

Compute Turnstile Crossing Times

This question evaluates proficiency in queue simulation, event-driven scheduling, and handling priority and tie-breaking rules while achieving linear ...

Coding & AlgorithmsSimulation & State MachinesStacks & Queues

Sort Flights by Company Volume and Per-Destination Flight Counts

A table holds flight records, one row per flight. Write a query that lists every flight with only three columns, id, destination and departure_time, s...

Data Manipulation (SQL/Python)SQL

Answer leadership and ambiguity scenarios

Question Answer the following behavioral & leadership questions with concrete examples. Use a structured format such as STAR (Situation, Task, Actions...

Behavioral & LeadershipLeadership & InfluenceConflict & Collaboration

Machine Learning Engineer

Design a scalable service and model performance

System Design: Multi-Region, 50k QPS, p95 < 100 ms Context Design an online, read-heavy key-value service (for example, a user profile or feature look...

System DesignKey-Value StoresConsistency & Availability

362 people solved

Aug 14, 2025

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Tech Interview Questions

Field Layout: getOffset and insert

Aggregate video time and unique pins in Python

Explain Encapsulation through an Object Invariant

Adobe feature that lets people with no design training make polished visuals

Find the Latest Unoccupied Arrival Time That Still Boards a Bus

Longest Balanced Substring in a String of Parentheses

Clarify and Find Common Ancestors in a Graph

Round numeric string values

Implement a leaky-bucket rate limiter

Return the First Non-Repeating Character

Find pairs with the minimum absolute difference

Design an Uber Eats Cart Service

Check Whether the Middle Value Is Unique

Determine Appropriate Statistical Test for Comparing Means

Search a Folder Hierarchy with Extensible Document Filters

Find exit URL via BFS API calls

Compute Turnstile Crossing Times

Sort Flights by Company Volume and Per-Destination Flight Counts

Answer leadership and ambiguity scenarios

Design a scalable service and model performance

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