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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 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
Ramp logo
Ramp
Medium
Software Engineer Locked

Implement a Per-IP Sliding Window Rate Limiter

This Ramp software engineering question evaluates implementation of a per-IP sliding window rate limiter. It prepares candidates to discuss time-windo...

Software Engineering FundamentalsRate LimitingData Structure Design
30
0
216 people solved
Jul 2, 2026
xAI logo
xAI
Hard
Software Engineer Locked

Design and Implement a URL Shortening Service

Prepare for a xAI system design interview about design and implement a url shortening service. This question focuses on requirements, architecture, tr...

System DesignSystem Design FundamentalsAPI Design
24
0
242 people solved
Jul 3, 2026
Two Sigma logo
Two Sigma
Medium
Data Scientist

Implement merge sort and largest 1-rectangle

The coding round included two algorithm questions: 1. Implement merge sort for an array of integers. Return the sorted array and explain its time and ...

Coding & Algorithms
24
0
171 people solved
Feb 26, 2026
Amazon logo
AmazonTwilioAgoda

Also asked at Agoda, Google, Oracle, Salesforce, Bloomberg, Meta, Attentive, Grammarly, Goldman Sachs, Microsoft, Walmart Labs, Couchbase, Morgan Stanley, TikTok

Medium
Software Engineer

Erase Equal Adjacent Runs of Size k

Problem Repeatedly remove k adjacent equal letters from s, joining the two surrounding pieces after every removal. Return the final string when no rem...

Coding & AlgorithmsStacks & QueuesArrays & Strings
0
0
12 people solved
Google logo
Google
Hard
Software Engineer

Place New Stations to Minimize the Widest Gap

Problem stations contains strictly increasing positions on the x-axis. Add exactly k stations at arbitrary real positions, including noninteger positi...

Coding & AlgorithmsBinary SearchMath & Number Theory
2
0
22 people solved
DoorDash logo
DoorDash
Medium
Product Manager

DoorDash Grocery Subscription Strategy: Make the Go or No-Go Call

You are a product manager at DoorDash, the delivery marketplace best known for restaurant orders. Leadership wants your recommendation on whether the ...

Product Design & StrategyProduct StrategyGrowth & Monetization
1
0
14 people solved
Sep 27, 2026
IBM logo
IBM
Medium
Software Engineer Locked

Break Adjacent Duplicate Characters

Practice counting the minimum replacements required to break adjacent duplicates across many lowercase words.

Coding & Algorithms
8
2
72 people solved
Aug 28, 2026
Citadel logo
Citadel
Medium
Software Engineer

Implement a single-producer multi-consumer ring buffer

Implement a fixed-capacity ring buffer in C++ for a setting with one producer and multiple consumers. Design a class that stores integers in a preallo...

Coding & AlgorithmsData Structure Design
38
0
346 people solved
Feb 21, 2026
Waymo logo
Waymo
Medium
Frontend EngineerSenior+ Locked

Design the Frontend of an AI Chat Application With Streaming Replies

Frontend-focused system design for an AI chat application. It covers component structure, conversation and message state, streaming replies, stop and ...

System DesignState ManagementReal-Time Systems
5
0
51 people solved
Sep 10, 2026
Lyft logo
Lyft
Medium
Software EngineerSenior+ Locked

Minimum Window Substring with Repeated Required Characters

Find the shortest substring covering every required character, including duplicates, with case-sensitive matching and a linear-time minimum-window alg...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
7
0
75 people solved
Sep 8, 2026
TikTok logo
TikTok
Medium
Software Engineer Locked

Find the Longest Substring with at Most Two Distinct Characters

Find the longest contiguous substring containing at most two distinct characters. This portable version of the standard referenced problem defines emp...

Coding & Algorithms
7
0
123 people solved
Aug 29, 2026
Google logo
GoogleMetaAmazon

Also asked at Amazon, Bloomberg, C3 AI

Easy
Software Engineer

Choose Three Lengths with the Largest Nondegenerate Triangle Perimeter

Problem Choose three occurrences from nums as side lengths. Return the largest possible perimeter of a triangle with positive area, or0 if no such tri...

Coding & AlgorithmsGreedySorting
1
0
15 people solved
LinkedIn logo
LinkedIn
Easy
Software Engineer AI Locked

Debug Queues and Solve Arrays

This multi-part question evaluates competencies in data structures (heap invariants and in-place array manipulation), concurrent programming (designin...

Coding & AlgorithmsHeaps & Priority QueuesArrays & Strings
19
0
261 people solved
Mar 10, 2026
Roblox logo
Roblox
Hard
Frontend Engineer Locked

Build a Configurable Two-Player Tic-Tac-Toe Board in React

Build an accessible React tic-tac-toe board for configurable sizes from 3 to 20, covering turn order, win and draw behavior, reset, stable selectors, ...

Software Engineering Fundamentals
6
0
58 people solved
Jul 31, 2026
Okta logo
Okta
Medium
Software Engineer Locked

Evaluate Role-Based Access with Deny Precedence

Evaluate access for a user and requested property in a user-to-role-to-permission model, applying deny-overrides-allow precedence and defaulting to de...

Coding & Algorithms
4
0
81 people solved
Aug 20, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist Locked

Find the Expected Number of Consecutive Chosen Pairs

Find the expected number of adjacent integer pairs in a uniformly chosen six-element subset of 1 through 35. The solution uses 34 indicators, computes...

Statistics & Math
2
0
44 people solved
Aug 16, 2026
xAI logo
xAI
Medium
Frontend Engineer Locked

Render Nested JSON in a Code-Style Viewer

Render nested JSON safely in React with indentation, type styling, collapsible containers, empty values, and explicit boundaries between a viewer and ...

Software Engineering FundamentalsReact & UI FrameworksTrees
1
0
29 people solved
Sep 15, 2026
Netflix logo
Netflix
Medium
Software Engineer Locked

Find the Longest Substring Without Repeated Characters

Implement the length of the longest contiguous substring whose ASCII characters are all distinct. Focus on contiguous-range reasoning, repeated-charac...

Coding & Algorithms
14
0
96 people solved
Jul 31, 2026
ByteDance logo
ByteDance
Easy
Site Reliability Engineer Locked

Validate Matching Brackets

Determine whether a long string of parentheses, square brackets, and braces is correctly nested and type-matched. The problem tests stack discipline, ...

Coding & Algorithms
3
0
62 people solved
Sep 1, 2026
LinkedIn logo
LinkedInMetaAmazon
Easy
Software Engineer

Find the Second Distinct Value in a Minimum-Parent Tree

Problem The nonempty binary tree has either zero or two children per node, and each internal node equals the smaller value of its two children. Return...

Coding & AlgorithmsTrees
0
0
10 people solved
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