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

Google

Medium

Software Engineer

Which Area Would You Improve Now to Do Better Work at Google?

In a behavioral interview for a software engineer role at Google, you are asked: if you could improve yourself right now, which area would you want to...

Behavioral & LeadershipSelf-Awareness & Growth

Count Connectable Server Pairs Through Each Tree Vertex

Count Connectable Server Pairs Through Each Tree Vertex You are given a valid unrooted weighted tree with n servers numbered 0..n - 1. Each row edges[...

Coding & AlgorithmsTreesMath & Number Theory

Maximum total weight of graph nodes with no two adjacent

You are given an undirected graph whose nodes carry positive weights. Choose a set of nodes such that no two chosen nodes are joined by an edge, and r...

Coding & AlgorithmsGraphsBacktracking & Recursion

Reverse the Original Printable-Character Array In Place

Problem Reverse s by modifying its original character array in place, using O(1) extra memory. The function returns void. Preserve every printable ASC...

Coding & AlgorithmsTwo Pointers & Sliding Window

15 people solved

OpenAI

Hard

Machine Learning Engineer Locked

Implement Backprop for a Tiny Network

This question evaluates understanding of backpropagation, gradient derivation, numerical stability of softmax cross-entropy, and practical implementat...

Machine LearningML CodingNeural Networks & Training

Fixed-Capacity Key-Value Cache That Evicts the Least Recently Used Key

Implement a key-value cache with a fixed capacity. When the cache is full and a new key has to be inserted, the cache evicts the key that was used lea...

Coding & AlgorithmsData Structure DesignLinked Lists

31 people solved

Oct 7, 2026

Lowest Common Ancestor of Two Values in a Binary Tree Given in Level Order

Given a binary tree whose node values are all distinct, and two values p and q that both occur in it, return the value of their lowest common ancestor...

Coding & AlgorithmsTrees

Compute the Optimal Prefix-Merging Game Difference

Problem Alice and Bob alternate with Alice first. With more than one stone remaining, choose at least two leftmost stones, add their sum to the curren...

Coding & AlgorithmsDynamic Programming

Fixing a flaky async Python call path with timeouts and exponential-backoff retries

A Python service awaits a call to an unreliable dependency, and the call sometimes fails with an error and sometimes stalls. Debug the existing call p...

Software Engineering FundamentalsAPI Integration & HTTP ClientsConcurrency

48 people solved

May 17, 2026

GoogleBloombergMetaAmazon

Medium

Software Engineer

Construct a Permutation without an Ordered Arithmetic Triple

Problem Return any permutation of1 through n such that no positions i<k<j satisfy 2*nums[k] == nums[i]+nums[j]. At least one valid permutation exists....

Coding & AlgorithmsMath & Number TheoryArrays & Strings

Bracket the Dots in an IPv4 Address

Problem Given a valid IPv4 address string, return the same address with each dot replaced by [.]. Preserve all other characters and their order. `cpp ...

Coding & AlgorithmsArrays & Strings

11 people solved

Amazon

Medium

Software EngineerIntern

Implement Cache and Count Components

You are asked to solve two independent coding problems in this session, each followed by a short discussion. This mirrors a 60-minute Amazon SDE codin...

Coding & AlgorithmsData Structure DesignGraphs

Software EngineerSenior+

Versioned Integer Array with Snapshots and Point-in-Time Reads

Build a fixed-length array of integers that remembers its history. Every element starts at 0. You can change elements, take numbered snapshots of the ...

Coding & AlgorithmsData Structure DesignBinary Search

Software Engineer Locked

Design Product Analytics and Event Capture for a Small E-Commerce Store

Design analytics for a small independent e-commerce store, with the emphasis on how behavioral and purchase data is gathered in the first place. It te...

System DesignSystem Design FundamentalsData Ingestion & CDC

Maximize Binary Image Overlap by Translation

Problem Translate one n-by-n binary image horizontally and vertically by integer offsets, without rotating it. Bits moved outside the image boundary a...

Coding & AlgorithmsGrids & Matrices

15 people solved

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

Overlapping Meetings and Minimum Rooms: No Sweep Line, No Library Sort, Streams, Logs

You are given a list of meetings, each with an integer start time and end time, start < end. This round was a chain of questions on the same input, ea...

Software Engineering FundamentalsIntervals & SchedulingHeaps & Priority Queues

Machine Learning Engineer

Where to apply ML in a task flow from customer request to driver-uploaded evidence

This was a short, free-form design discussion at the end of a phone screen. The interviewer described a platform on which customers submit tasks that ...

ML System DesignLLM ApplicationsModel Evaluation

Software Engineer Locked

Process a Timestamped Workspace Credit Ledger

Implement a timestamped workspace credit ledger with deposits, transfers, spending, delayed cashback, rankings, merges, status checks, and historical ...

Software EngineerSenior+ Locked

Design a Rental Search and Booking Platform from Startup to Scale

Design a short-term rental search and booking platform that can evolve from a startup architecture to large-scale traffic. Balance fast, possibly stal...

System Design

135 people solved

Jun 15, 2026

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Tech Interview Questions

Which Area Would You Improve Now to Do Better Work at Google?

Count Connectable Server Pairs Through Each Tree Vertex

Maximum total weight of graph nodes with no two adjacent

Reverse the Original Printable-Character Array In Place

Implement Backprop for a Tiny Network

Fixed-Capacity Key-Value Cache That Evicts the Least Recently Used Key

Lowest Common Ancestor of Two Values in a Binary Tree Given in Level Order

Compute the Optimal Prefix-Merging Game Difference

Fixing a flaky async Python call path with timeouts and exponential-backoff retries

Construct a Permutation without an Ordered Arithmetic Triple

Bracket the Dots in an IPv4 Address

Implement Cache and Count Components

Versioned Integer Array with Snapshots and Point-in-Time Reads

Design Product Analytics and Event Capture for a Small E-Commerce Store

Maximize Binary Image Overlap by Translation

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

Overlapping Meetings and Minimum Rooms: No Sweep Line, No Library Sort, Streams, Logs

Where to apply ML in a task flow from customer request to driver-uploaded evidence

Process a Timestamped Workspace Credit Ledger

Design a Rental Search and Booking Platform from Startup to Scale

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ML System Design

System Design Interview