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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
Revolut logo
Revolut
Medium
Product Manager

Revolut Trading Platform Turned Unprofitable: Root-Cause Its First Loss

You are the product manager for Revolut's trading platform. For the first time, the platform's profit has fallen below zero. How would you investigate...

Analytics & ExperimentationMetric DiagnosticsBusiness Case Analysis
2
0
22 people solved
Oct 17, 2025
Google logo
Google
Hard
Machine Learning Engineer Locked

Design large-scale near-duplicate video detection

This question evaluates a Machine Learning Engineer's competency in scalable similarity search and representation learning for multimedia, including e...

System DesignEmbeddings & Vector SearchComputer Vision
25
0
187 people solved
Jan 6, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad Locked

Caesar Cipher with Translation-Table Optimization

This question tests practical string manipulation and modular arithmetic by requiring implementation of a classic Caesar cipher with correct case-pres...

Coding & Algorithms
12
0
82 people solved
Jun 15, 2026
Atlassian logo
Atlassian
Medium
Software Engineer Locked

Design a rating aggregator that returns totals and averages

This question evaluates a candidate's competency in designing and implementing data structures and algorithms for maintaining dynamic aggregates (tota...

Coding & Algorithms
12
0
166 people solved
Jan 22, 2026
Salesforce logo
Salesforce
Medium
Product Manager

Setting a Launch Price for a Retailer's New Product: What Drives the Number

You are a product manager at a large retail company, and you own the price of a product the retailer is about to launch. Walk through the factors you ...

Product / Decision MakingGrowth & MonetizationBusiness Case Analysis
1
0
9 people solved
Jul 11, 2026
Google logo
GoogleMetaMicrosoft
Easy
Software Engineer

Find the Smallest Value After One Digit-Sum Replacement

Find the Smallest Value After One Digit-Sum Replacement Problem You are given a positive integer array nums. Replace each element with the sum of the ...

Coding & AlgorithmsMath & Number Theory
1
0
10 people solved
Databricks logo
Databricks
Medium
Software Engineer

Implement CIDR firewall matcher

Implement CIDR firewall matcher Firewall Rule Matcher for IPv4 CIDR Rules Context and Assumptions You are to design and implement a firewall rule matc...

Coding & AlgorithmsData Structure Design
77
0
449 people solved
Aug 4, 2025
TikTok logo
TikTok
Medium
Machine Learning Engineer

Find longest substring without repeating characters

Problem Given a string s, find the length of the longest contiguous substring that contains no repeated characters. Input - A string s (may contain le...

Coding & Algorithms
6
0
87 people solved
Sep 29, 2025
Google logo
GoogleAmazonMeta

Also asked at Meta, Bloomberg, Microsoft, Squarepoint

Easy
Software Engineer

Reach the Staircase Top at Minimum Cost

Problem cost[i] is paid when leaving step i, after which you may climb one or two steps. You may begin at step 0 or step 1. Return the least total cos...

Coding & AlgorithmsDynamic Programming
1
0
10 people solved
Google logo
Google
Medium
Software EngineerNew Grad

Count Good Numbers up to a Limit

Count Good Numbers up to a Limit A positive integer is good when all of the following hold: 1. Its decimal representation contains no digit 0. 2. No d...

Coding & Algorithms
18
1
118 people solved
Apr 26, 2026
Coinbase logo
Coinbase
Hard
Software Engineer

Design real-time stock price viewer

System Design: Real‑Time Stock Prices Viewer (No History) You are designing a real‑time system that lets clients view current stock prices only. No hi...

System DesignReal-Time SystemsTrading Systems
40
0
350 people solved
Sep 6, 2025
Google logo
GoogleMicrosoft
Hard
Software Engineer

Least Two-Finger Travel on the Six-Column Keyboard

Problem The keyboard rows are ABCDEF, GHIJKL, MNOPQR, STUVWX, YZ. Letter index t from A=0 has coordinates(t/6,t%6). Type word in order using either of...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory
1
0
12 people solved
Datadog logo
Datadog
Hard
Software Engineer

Implement Prefix Match Filter

Design a data structure that stores a collection of prefix strings. Then, given a list of input strings, return every string that begins with at least...

Coding & AlgorithmsData Structure DesignString Algorithms
32
0
251 people solved
Feb 25, 2026
Roblox logo
Roblox
Hard
Data ScientistIntern

Compute sample size and Bayes posterior

You are implementing two small statistical utilities. Part A — Power / sample size (two-sample z-test) - Input: - x: a 1D numeric array of historica...

Statistics & Math
9
0
88 people solved
Nov 23, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Implement Document Predicate APIs

Design a simple document service that stores text documents identified by filename. Implement these APIs: - InsertDoc(filename, content): store or ove...

Coding & AlgorithmsParsing & Interpreters
22
1
179 people solved
Apr 12, 2026
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Transform and aggregate messy event data

Using pandas (vectorized; no loops), clean, combine, and aggregate the following to produce country/plan day-level metrics for 2025-08-31. DataFrames ...

Data Manipulation (SQL/Python)Pandas & Python DataData Cleaning & Wrangling
20
0
347 people solved
Oct 13, 2025
Remitly logo
Remitly
Easy
Software Engineer

Describe how you prevent project delays

Answer the following behavioral questions. 1) How do you ensure your project won’t be delayed? Explain your concrete methods, habits, and mechanisms y...

Behavioral & LeadershipOwnership & Execution
11
0
161 people solved
Nov 30, 2025
Sierra logo
Sierra
Medium
Product Manager

Diagnosing a Falling Core Metric and Choosing What to Build to Recover It

One of your product's key metrics has started to decline. How would you work out why, and how would you then decide what to build in response? Clarify...

Analytics & ExperimentationMetric DiagnosticsPrioritization & Tradeoffs
1
0
13 people solved
May 23, 2026
Ramp logo
Ramp
Medium
Software Engineer

Minimum Character Changes to Make Every k-Length Block a Palindrome

Minimum Character Changes to Make Every k-Length Block a Palindrome You are given a password string and an integer k. The length of password is guaran...

Coding & Algorithms
6
0
100 people solved
Mar 11, 2026
Google logo
Google
Medium
Software Engineer

Ad Service That Serves the Top-Scoring Ad Without Back-to-Back Repeats

Implement an ad service with two operations: - InsertAd(content, score) adds an ad with text content (a string) and an integer score. - GetAd() return...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
0
0
9 people solved
Jul 20, 2026
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