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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
TikTok logo
TikTok
Medium
Machine Learning Engineer Locked

Explain FlashAttention, KV cache, and RoPE

This question evaluates understanding of transformer attention optimizations (FlashAttention), autoregressive decoding state management (KV cache), an...

Machine LearningTransformers & AttentionLLM Inference & Serving
9
0
159 people solved
Jan 22, 2026
xAI logo
xAI
Medium
Software Engineer

Explain strings, moves, and concurrency

Question What is a string in programming languages? What fields are stored in a typical struct string and how would you implement one yourself? What i...

Coding & Algorithms
31
0
120 people solved
Jul 29, 2025
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Find the Earliest Contiguous Removal That Balances Index Sums

Find the earliest fixed-length block to remove so the remaining array has equal even- and odd-index sums, accounting for the reindexed suffix.

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
6
0
105 people solved
Sep 9, 2026
Apple logo
AppleGoogleBloombergMicrosoft

Also asked at Bloomberg, Microsoft

Medium
Software Engineer

Rebuild Any Binary Tree Matching Preorder and Postorder

Problem Given preorder and postorder traversals of the same binary tree with distinct values, construct and return a tree matching both traversals. If...

Coding & AlgorithmsTrees
1
0
9 people solved
Oracle logo
Oracle
Medium
Software Engineer Locked

Design an Enterprise Remote Browser Isolation System

Design a system that runs browsing sessions on isolated virtual nodes and streams the result to enterprise clients. Connect requirements and APIs to d...

System Design
2
0
31 people solved
Jul 26, 2026
Google logo
Google
Hard
Software EngineerSenior+ Locked

Defend the Trade-Offs in One Project

Defend the major trade-offs in one project by connecting original constraints, architecture, alternatives, evidence, implementation details, and what ...

Behavioral & Leadership
2
0
45 people solved
Aug 2, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Implement a calendar with non-overlapping bookings

Problem Design a calendar booking system that stores half-open time intervals [start, end) (inclusive of start, exclusive of end). Implement a class w...

Coding & AlgorithmsIntervals & SchedulingData Structure Design
28
1
192 people solved
Nov 25, 2025
Temu logo
Temu
Easy
Data EngineerSenior+ Locked

Compute User Login Streaks

This question evaluates SQL proficiency in processing event logs for time-series analysis, encompassing date arithmetic, deduplication of same-day eve...

Coding & AlgorithmsSQL
19
0
147 people solved
Apr 3, 2026
Akuna Capital logo
Akuna Capital
Medium
Software Engineer

Compute max profit across dated stock quotes

You are given an unsorted list of price records for multiple stocks, each record as (date, symbol, price). Dates may be repeated across different symb...

Coding & AlgorithmsDynamic ProgrammingSorting
29
0
217 people solved
Sep 6, 2025
Squarepoint logo
Squarepoint
Medium
Risk Technology Software EngineerSenior+ Locked

Find a Target Sum Using Two Sorted Arrays

Determine whether two sorted arrays contain one value each that sum to a target using opposite-end pointers and overflow-safe arithmetic.

Coding & Algorithms
4
0
54 people solved
Aug 16, 2026
Uber logo
Uber
Medium
Data ScientistNew Grad Locked

Evaluate Promotions for Uber Eats Users

This question evaluates a data scientist's causal inference and experimentation competencies—including randomized trial design, treatment-effect estim...

Machine LearningExperiment Design (A/B Testing)
75
0
571 people solved
Apr 30, 2026
Attentive logo
Attentive
Medium
Software EngineerNew Grad

Implement Due Broadcast Sender

You are building a notification system. You are given: - A mapping from company_id to a list of subscriber IDs. - A list of broadcast logs. Each log c...

Coding & Algorithms
6
0
85 people solved
Apr 11, 2026
Google logo
Google
Medium
Software Engineer

Troubleshoot CPU, latency, and DNS issues

A) A Linux server’s CPU usage suddenly spikes. What immediate checks and commands would you run (e.g., top/htop, pidstat, perf, iostat), how would you...

Coding & AlgorithmsDebuggingNetworking
11
0
210 people solved
Sep 6, 2025
Scale AI logo
Scale AI
Medium
Software Engineer Locked

Implement a Task Processor

This question evaluates understanding of priority-based scheduling and dependency resolution, focusing on data structures and graph-ordering concepts ...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
46
0
405 people solved
Feb 27, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Implement Billing Coding Exercises

This question evaluates skills in billing and payment reconciliation, datetime normalization and comparison, subscription-based scheduling, API integr...

Coding & Algorithms
21
0
197 people solved
Oct 7, 2025
Amazon logo
Amazon
Hard
Data Scientist Locked

Design a robust traffic forecasting pipeline

This question evaluates a candidate's competency in end-to-end time-series forecasting pipeline design, covering data cleaning and missing-value handl...

Machine Learning
8
0
62 people solved
Oct 13, 2025
Google logo
GoogleAmazon
Hard
Software Engineer

Score a Grid After Coloring Column Prefixes

Score a Grid After Coloring Column Prefixes Problem You are given an n x n integer matrix grid. Every cell is initially white. In one operation, choos...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
1
0
8 people solved
Airbnb logo
Airbnb
Medium
Software Engineer

Implement prioritized refund allocation engine

Implement a refund allocation function that takes: (a) a list of payments, each with a unique paymentId, method ∈ {CREDIT, CREDIT_CARD, PAYPAL}, ISO-8...

Coding & AlgorithmsGreedy
37
2
314 people solved
Sep 6, 2025
Microsoft logo
MicrosoftGoogle
Medium
Software Engineer

Find the Smallest Stable Index II

Find the Smallest Stable Index II You are given an integer array nums of length n and an integer k. For each zero-based index i, its instability score...

Coding & AlgorithmsArrays & Strings
0
0
6 people solved
NVIDIA logo
NVIDIA
Medium
Software Engineer

Design algorithms for test scheduling

Design algorithms for test scheduling You have tens of thousands of graphics test cases with inter-test dependencies and hardware/driver constraints. ...

Coding & AlgorithmsGraphsJob Scheduling & Workflows
9
0
136 people solved
Aug 9, 2025
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