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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
639
Companies
980
Updated
11.10.2026
639 Questions 980 Companies11.10.2026
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
Microsoft logo
Microsoft
Medium
Data Scientist

Find common friends from directed edges

You have a directed edge list that records who followed whom. A mutual “friendship” exists only if both directions appear (A→B and B→A). Schema and sa...

Data Manipulation (SQL/Python)GraphsSQL
18
0
127 people solved
Oct 13, 2025
Verkada logo
Verkada
Medium
Software Engineer

Find users with access to all cameras

Given entities and relationships (user, owns, camera), (user, belongs_to, group), (group, owns, camera), and (group, belongs_to, group) where groups c...

Coding & AlgorithmsGraphs
17
0
156 people solved
Aug 8, 2025
Uber logo
Uber
Medium
Software Engineer

Solve BFS and grid tasks

The coding rounds included several algorithmic problems: 1. Threshold search with binary search: You are given floors 1..n and an API canOperate(floor...

Coding & AlgorithmsGraphsBinary Search
17
0
132 people solved
Feb 22, 2026
Airtable logo
Airtable
Hard
Software Engineer

Design JSON serialization for circular references

Design a JSON Serialization/Deserialization Strategy With Cycles and Determinism You are designing a JSON-based serializer/deserializer for a graph of...

System DesignParsing & InterpretersGraphs
37
0
415 people solved
Sep 6, 2025
Lyft logo
Lyft
Medium
Software Engineer

Solve grid compromise spread with BFS

You are given an m×n grid representing a data center: 0 = empty rack, 1 = secure server, 2 = compromised server. Each minute, any secure server that i...

Coding & AlgorithmsGrids & MatricesGraphs
21
0
138 people solved
Sep 6, 2025
Amazon logo
AmazonBloomberg
Hard
Software Engineer

Best Recovery Score Within a Path Budget

Best Recovery Score Within a Path Budget You are given a directed acyclic graph with nodes 0 through n - 1. Each entry [u, v, cost] in edges is a dire...

Coding & AlgorithmsGraphsBinary Search
0
0
8 people solved
Google logo
Google
Hard
Software Engineer Locked

Minimize travel time with optional meeting point

This question evaluates a candidate's understanding of graph shortest-path computation and meeting-point optimization, testing skills in handling weig...

Coding & AlgorithmsGraphs
16
1
139 people solved
Jan 6, 2026
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Return a topological ordering of a graph

This question evaluates understanding of graph algorithms—particularly topological sorting and cycle detection—and competency in ordering dependencies...

Coding & AlgorithmsGraphs
5
0
93 people solved
Jan 22, 2026
Uber logo
Uber
Medium
Software Engineer

Find minimum activations to absorb all balls

You are given n balls on a 2D plane, where ball i is at coordinate \((x_i, y_i)\). You are also given a distance threshold d. Two balls are considered...

Coding & AlgorithmsGraphs
22
0
285 people solved
Mar 1, 2026
Uber logo
Uber
Medium
Software Engineer

Detect cycle in directed dependency graph

You are given a directed dependency graph representing services in a system. - There are n services, labeled from 0 to n - 1. - You are given a list o...

Coding & AlgorithmsGraphs
8
0
130 people solved
Dec 8, 2025
Waymo logo
Waymo
Easy
Data Scientist Locked

Implement nested template string substitution

This question evaluates understanding of string processing, dependency resolution, recursive expansion, cycle detection, and efficiency techniques suc...

Coding & AlgorithmsParsing & InterpretersGraphs
26
1
197 people solved
Jan 17, 2026
Glean logo
Glean
Medium
Machine Learning Engineer

Determine Reachability in Train Schedule

You are given a train schedule represented as a list of train routes. Each route is a list of station names, where the element at index t is the stati...

Coding & AlgorithmsGraphsIntervals & Scheduling
26
0
199 people solved
Feb 7, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Schedule dependent services with layered startup

You are given N services and dependency pairs (u -> v) meaning u must start before v. 1) Produce a valid startup order if one exists; otherwise detect...

Coding & AlgorithmsGraphsJob Scheduling & Workflows
13
0
121 people solved
Sep 6, 2025
Uber logo
Uber
Hard
Software Engineer

Find earliest time all riders become connected

You are given a time-ordered log of events involving Uber riders. Each event has a timestamp and two rider names. Event types: 1. t X shared-ride-with...

Coding & AlgorithmsGraphs
21
0
155 people solved
Jan 3, 2026
Jane Street logo
Jane Street
Hard
Software Engineer

Snake Game: Minimum Moves to Reach the Apple

Snake Game: Minimum Moves to Reach the Apple You are simulating the classic Snake game on a grid with R rows and C columns. Cells are identified as (r...

Coding & AlgorithmsGraphsGrids & Matrices
72
0
567 people solved
Sep 14, 2022
Qualcomm logo
Qualcomm
Medium
Software Engineer

Implement A* Maze Search

Implement maze pathfinding in C++. You are given an m x n grid where '.' is an open cell, '#' is a wall, S is the start, and T is the target. You may ...

Coding & AlgorithmsGrids & MatricesGraphs
8
0
135 people solved
Mar 2, 2026
Snowflake logo
Snowflake
Hard
Software Engineer

Implement course scheduling and rate limiter analysis

You are given two independent coding problems. --- Problem 1: Course Scheduling You are planning to take a set of courses and are given prerequisite r...

Coding & AlgorithmsGraphsTwo Pointers & Sliding Window
23
0
308 people solved
Nov 22, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Reconstruct DNA from tagged fragments

This question evaluates understanding of sequence reconstruction, graph modeling, and traversal/orientation constraints, focusing on ordering labeled ...

Coding & AlgorithmsGraphs
8
0
156 people solved
Mar 1, 2026
Amazon logo
Amazon
Hard
Software Engineer

Design a file search module like UNIX find

Design Task: Object-Oriented module that mimics UNIX find Context Design an object-oriented library that replicates the core functionality of the UNIX...

System DesignLow-Level Design (OOP)
48
0
333 people solved
Aug 13, 2025
Snowflake logo
Snowflake
Hard
Software Engineer

Design multi-core service startup scheduler

Service Startup Scheduler on a Host with M CPU Cores Context You are given a directed acyclic graph (DAG) of services where an edge u → v means servic...

System DesignJob Scheduling & WorkflowsGraphs
16
0
242 people solved
Sep 6, 2025
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