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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
Edgebot logo
Edgebot
Medium
Data Scientist

Explain PPO and GRPO: Clipped Objective, Advantage Estimation and Group Baselines

Explain two policy-gradient methods used to train agents and language models with reinforcement learning: Proximal Policy Optimization (PPO) and Group...

Machine LearningReinforcement LearningFine-Tuning & Alignment Techniques
1
0
7 people solved
Nov 8, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Convert Streaming Call-Stack Samples into Function Events

Convert timestamped call-stack samples into ordered function start and end events, preserving frame depth and recursive occurrences. Handle stack chan...

Coding & AlgorithmsArrays & StringsStacks & Queues
155
2
1121 people solved
Aug 5, 2026
Waymo logo
Waymo
Medium
Software Engineer Locked

Lowest Horizontal Cut That Splits Square Cakes Into Equal Total Areas

Square cakes sit on a table with sides parallel to its edges; find the lowest horizontal cut line that splits the total cake area equally, returned as...

Coding & AlgorithmsIntervals & SchedulingBinary Search
13
0
98 people solved
Sep 10, 2026
Google logo
Google
Medium
Software EngineerSenior+

Enforce a Country's IP Ban List on Incoming Connections Using Its Lookup API

A country requires your service to refuse network connections from IP addresses it has banned. The country provides an API that, given an IP address, ...

System DesignSystem Design FundamentalsFault Tolerance & Failover
7
0
71 people solved
Aug 15, 2026
Google logo
GoogleAmazonSalesforce

Also asked at Salesforce, Meta, Microsoft, Bloomberg, Oracle, TikTok, Arista Networks, Palo Alto Networks

Medium
Software Engineer

Collect Every Target-Sum Root-to-Leaf Value Path

Problem Return every root-to-leaf path in a binary tree whose node values sum to targetSum. Each returned path is a list of values in root-to-leaf ord...

Coding & AlgorithmsTreesBacktracking & Recursion
4
1
27 people solved
Google logo
GoogleMetaAmazon

Also asked at Amazon, Bloomberg, Adobe, Microsoft, TCS, Infosys, Apple, TikTok, Uber, Goldman Sachs, Samsung, IXL Learning, NVIDIA, PayPal, Oracle, ByteDance, Visa

Medium
Software Engineer

Return Any Strict Peak Index in Logarithmic Time

Problem Find any peak in a zero-indexed array and return its index. A peak is strictly greater than each adjacent in-bounds value. Treat the conceptua...

Coding & AlgorithmsBinary Search
4
0
26 people solved
LinkedIn logo
LinkedIn
Medium
Data Scientist

State the Mean and Variance of a Poisson Count

State the Mean and Variance of a Poisson Count If the number of arrivals in a fixed interval follows a Poisson distribution with parameter lambda, wha...

Statistics & MathProbability
5
0
45 people solved
Sep 22, 2026
Google logo
GoogleYandexAmazon

Also asked at Amazon, Bloomberg, Meta, Microsoft, VK, Nebius

Easy
Software Engineer

Cover Sorted Unique Integers with Minimal Exact Ranges

Problem Given a sorted array of distinct integers, return the smallest sorted list of inclusive ranges covering exactly its values. No input value may...

Coding & AlgorithmsIntervals & Scheduling
4
0
30 people solved
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Find List Words Formed by Joining Two or More Other Words From the List

Given a list of distinct lowercase words, return every word in the list that can be formed by joining two or more words from the same list end to end....

Coding & AlgorithmsString AlgorithmsDynamic Programming
0
0
11 people solved
Oct 24, 2026
Headway logo
Headway
Medium
Software Engineer Locked

Debug a Stale Insurance Eligibility Status

A patient list shows a cached eligibility_status from UserInsurance, while each insurance record has timestamped EligibilityLookup snapshots. Make the...

Software Engineering FundamentalsDebuggingCaching
18
0
223 people solved
Jul 25, 2026
Affirm logo
Affirm
Medium
Software Engineer Locked

Determine Redeemable Promotion Offers from Event History

Determine each event user's redeemable promotions at a cutoff by replaying ordered redeem and unredeem events, applying half-open offer windows and pe...

Coding & Algorithms
70
1
555 people solved
Aug 25, 2026
Google logo
Google
Medium
Software Engineer

Arrange Crops into Connected Regions in Rectangular and Two-Square Gardens

A rectangular garden has N rows and M columns. There are K crop types, labeled 1 through K. Crop i must occupy exactly count[i] cells, and the counts ...

Coding & AlgorithmsGrids & MatricesBacktracking & Recursion
15
1
175 people solved
Aug 26, 2026
Baseten logo
Baseten
Medium
Software Engineer

XOR-based random number generator used to encrypt and decrypt a tree document

This is a two-part coding exercise. First, implement a pseudo-random number generator (PRNG) whose state update is built from bitwise XOR. Then use th...

Software Engineering FundamentalsBit ManipulationCryptography
17
0
119 people solved
Aug 4, 2026
Oracle logo
Oracle
Medium
Software Engineer

Hiring-manager deep dive: your on-call experience and your hardest project

In a hiring-manager round that was scheduled as a system design interview, the conversation instead became a deep dive into the candidate's resume. Th...

Behavioral & LeadershipProject Deep DiveReliability & SRE
0
0
7 people solved
Oct 29, 2026
Alibaba logo
Alibaba
Medium
Software Engineer

Idempotent Kafka Consumer: Duplicate Writes, Offset Commits and a Second Database

A backend service consumes messages from a Kafka topic. Processing a message writes a record to a database, and downstream business logic continues fr...

System DesignDistributed Transactions & IdempotencyMessaging & Event-Driven
6
0
43 people solved
Oct 7, 2026
Apple logo
Apple
Medium
Software Engineer

Days Until Poison Stops Spreading in a Plant Grid Under a K-of-8-Neighbors Rule

A field of plants is laid out as an m x n grid. A cell holding 0 is a healthy plant and a cell holding 1 is a poisoned plant. Poison spreads once a da...

Coding & AlgorithmsGrids & MatricesGraphs
11
2
119 people solved
Sep 20, 2026
xAI logo
xAI
Medium
Software Engineer Locked

Make a Racy BankAccount Deposit Thread-Safe Without Editing the Class, in Python and Go

A concurrency question built around a BankAccount class whose deposit method reads the balance, sleeps, then writes it back. Candidates find every rac...

Software Engineering FundamentalsConcurrencyProgramming Languages
11
0
84 people solved
Sep 5, 2026
Microsoft logo
MicrosoftAmazonGoogle

Also asked at Google, Meta, Infosys, Revolut, Bloomberg, PayPal, TikTok, Samsung, Square, Oracle, TCS, Walmart Labs, Intuit, NVIDIA, Salesforce, Huawei

Medium
Software Engineer

Measure a Strictly Increasing Subsequence

Problem Return the maximum length of a strictly increasing subsequence of nums. A subsequence preserves index order but need not use consecutive posit...

Coding & AlgorithmsDynamic ProgrammingBinary Search
2
0
23 people solved
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Chat Assistant Inference Service: Streaming, Free-Tier Limits, GPU Scheduling

Design the serving system for a chat assistant built on a large language model: stream replies token by token, rate-limit a free tier alongside paid u...

System DesignRate LimitingLLM Inference & Serving
9
0
93 people solved
Sep 20, 2026
Meta logo
MetaMicrosoftAmazon

Also asked at Amazon, Google, Bloomberg, Deloitte

Easy
Software Engineer

Find Customers with No Matching Order

Problem Return the names of customers who have never placed an order. Match Customers.id to Orders.customerId and label the result Customers. The row ...

Data Manipulation (SQL/Python)SQL
1
1
21 people solved
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