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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
TikTokAmazonGoogle

Also asked at Google, Microsoft, Grammarly, Meta, Bloomberg, Verkada, IBM, TCS, Zoho, JPMorgan Chase, Oracle, Goldman Sachs

Hard
Software Engineer Locked

Remove the Fewest Overlapping Intervals

Find the minimum number of intervals to remove so the remaining set has no overlaps, while allowing intervals to touch at endpoints. The problem cover...

Coding & Algorithms
9
0
67 people solved
Jain Global logo
Jain Global
Easy
Data Scientist Locked

Python Internals: How dict Works, When Not to Use It, and NumPy Arrays vs Lists

Two Python fundamentals from a systematic trading screen: explain how a Python dict is implemented under the hood and which scenarios it is poorly sui...

Software Engineering FundamentalsProgramming LanguagesMemory Management
2
0
28 people solved
Sep 4, 2026
Scale AI logo
Scale AI
Hard
Software Engineer Locked

Implement Dependency-Aware Task Scheduler

This question evaluates skills in designing and implementing data structures and algorithms for priority scheduling, dependency resolution, and dynami...

Coding & AlgorithmsGraphsHeaps & Priority Queues
37
0
272 people solved
May 16, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Software Engineer Locked

Count Restricted Frog Paths on a Grid

A frog starts at (0, 0) and must reach (7, 4). Explain the assumptions and derivation clearly, check edge cases, and show how the result changes when ...

Statistics & Math
28
0
202 people solved
Jul 29, 2026
NVIDIA logo
NVIDIA
Medium
Data EngineerSenior+

Data Pipeline Reliability, Backfills, and Spark Optimization

You are interviewing for a senior data engineering role on an analytics and observability team. The interviewer asks a sequence of practical questions...

Software Engineering FundamentalsETL & Data PipelinesBatch & Stream Processing
16
1
170 people solved
May 3, 2026
LinkedIn logo
LinkedIn
Medium
Machine Learning EngineerSenior+ Locked

Design an ML Forecasting and Pacing System for Ad Bidding

Design an ML forecasting and pacing system for ad bidding that keeps hard budget controls deterministic while handling time-correct training, delayed ...

ML System Design
6
0
124 people solved
Aug 13, 2026
Amazon logo
AmazonGoogleBloomberg

Also asked at Bloomberg, Deutsche Bank, Microsoft

Medium
Software Engineer

Enumerate Results of Every Binary Parenthesization

Problem Insert parentheses in every possible full binary way into expression and return the resulting values. Keep the operands and operators in their...

Coding & AlgorithmsDynamic ProgrammingParsing & Interpreters
1
0
9 people solved
Socure logo
Socure
Hard
Software Engineer Locked

Implement a Concurrent Payment Queue with Visibility Timeouts

Implement an in-memory payment queue with atomic receives, visibility timeouts, ACK races, stale-callback protection, and idempotent payment processin...

Software Engineering FundamentalsConcurrencyData Structure Design
8
0
58 people solved
Sep 5, 2026
Patreon logo
Patreon
Medium
Software Engineer Locked

Analyze Reports in a Nested Org Chart

Analyze a nested organization chart and classify every employee as an individual contributor or manager. Compute direct and total descendant counts in...

Coding & Algorithms
7
0
74 people solved
May 27, 2026
Karat logo
Karat
Medium
Software Engineer

Validate password and list rule violations

Problem You are given a password string p. Validate it against a set of rules and return all rules that the password violates. Rules 1. Length must be...

Coding & AlgorithmsArrays & Strings
23
0
386 people solved
Jan 22, 2026
Cohere logo
Cohere
Medium
Frontend Engineer Locked

Design Real-Time Comments with Optimistic Updates

Design optimistic real-time comments with temporary identities, idempotent posting, response/event reconciliation, visible failure states, and durable...

System DesignState ManagementDistributed Transactions & Idempotency
3
0
31 people solved
Sep 15, 2026
Amazon logo
AmazonMetaGoogle

Also asked at Google, Microsoft, Bloomberg, Generalmotors

Hard
Software Engineer

Choose Three Disjoint Equal-Length Windows with Lexicographic Ties

Problem Choose three nonoverlapping length-k contiguous subarrays of nums maximizing their combined sum. Return their starting indices in increasing o...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
18 people solved
Confluent logo
Confluent
Medium
Software Engineer

Implement Tail and Find Monster Cost

This entry contains two coding tasks from the same interview category. Task A: Implement a file tail operation Implement a function tail(filePath, n) ...

Coding & AlgorithmsGrids & MatricesGraphs
29
0
329 people solved
Apr 29, 2026
Stripe logo
Stripe
Medium
Product Manager

Success metrics for an airline's arrival baggage experience

You are the product manager at a large airline, and your job is to make passengers happier with baggage claim. Which metrics would you define, and why...

Analytics & ExperimentationMetrics & KPIs
2
0
15 people solved
Jul 10, 2026
Google logo
Google
Easy
Data Scientist

Build a Next-Word Predictor

Implement a simple next-word model over tokenized training sentences. You need to write two functions: 1. train(sentences): receives a list of tokeniz...

Coding & AlgorithmsML CodingNatural Language Processing
47
1
405 people solved
Feb 8, 2026
MongoDB logo
MongoDB
Hard
Software Engineer Locked

Design a Scalable Read-Prefetch System

Design a scalable read-prefetch service with prioritized deduplicated candidates, bounded memory and concurrency, expiration and cancellation, demand ...

System Design
8
0
96 people solved
Aug 14, 2026
Google logo
GoogleWells Fargo
Hard
Software Engineer

Does an Injective Letter-to-Digit Sum Exist?

Problem Assign each uppercase letter one decimal digit, with different letters assigned different digits. Decode every left-side word and result as a ...

Coding & AlgorithmsBacktracking & RecursionMath & Number Theory
0
0
11 people solved
Mercor logo
Mercor
Medium
Software Engineer

Design an API to Deep-Copy a Dataset with Its Tasks, Model Responses and Grades

Your application stores datasets. Each dataset contains tasks, each task has model responses, and each response has grades. Design an API that copies ...

System DesignAPI DesignDistributed Transactions & Idempotency
5
0
105 people solved
May 31, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Evaluate a Live-Stream Group Notification Under Network Effects

Design an evaluation for live-stream group notifications that measures product impact beyond clicks. Define an intent-to-treat effect, address network...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
32
1
252 people solved
Jul 6, 2026
Google logo
Google
Medium
Software Engineer Locked

Choose One Blocker Removal for the Fastest Grid Signals

Choose at most one global blocker removal to minimize the time for all grid targets to receive signals, with deterministic tie-breaking.

Coding & AlgorithmsGrids & Matrices
24
1
230 people solved
Aug 27, 2026
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