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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
Oracle logo
Oracle
Medium
Software Engineer

Design a Video Upload Service for 100 GB Files with Chunked, Resumable Uploads

Design a system that lets users upload video files as large as 100 GB. The interviewer steered the discussion through five areas, in this order: handl...

System DesignFile & Media StorageStorage & Sharding
2
0
28 people solved
Sep 14, 2026
ByteDance logo
ByteDance
Medium
Site Reliability EngineerSenior+ Locked

How You Build Service Stability and Troubleshoot Production Incidents

A senior site reliability engineering question asking how the candidate makes production services stable and how they troubleshoot an incident when on...

Software Engineering FundamentalsReliability & SRECI/CD & Deployment
6
0
48 people solved
Sep 5, 2026
Palantir logo
Palantir
Medium
Software EngineerSenior+

Design a Real-Time Collision Warning System for Drones in Shared Airspace

Design a system that tracks drones flying in shared airspace and warns the people responsible for them when two drones are on course to come dangerous...

System DesignGeo & Delivery SystemsBatch & Stream Processing
3
0
59 people solved
Jan 30, 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
LinkedIn logo
LinkedIn
Medium
Data Scientist

Test a New Feature at Its Natural Product Placement

Test a New Feature at Its Natural Product Placement Design an experiment for a new feature. Explain why initially evaluating it in its natural product...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
1
0
23 people solved
Sep 22, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Count Islands and Return the Largest Island Size

Count four-connected islands and find the largest island using DFS or BFS, with correct visited-state handling and all-water behavior.

Coding & AlgorithmsGrids & MatricesStacks & Queues
3
0
25 people solved
Sep 11, 2026
Epic Systems logo
Epic Systems
Medium
Software Engineer Locked

Encode Letters with a Telephone Keypad

Encode letters as telephone keypad presses, ignoring case and spaces and inserting a separator whenever consecutive encoded letters share the same key...

Coding & AlgorithmsArrays & StringsSimulation & State Machines
3
0
38 people solved
Aug 30, 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
Stripe logo
Stripe
Medium
Product Manager

Stripe Checkout: Raise Payment Success While Improving Buyer and Merchant Experience

You are a product manager at Stripe. Your mandate has two halves: make checkout better both for the businesses that accept payments through Stripe and...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
2
0
17 people solved
Aug 22, 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
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
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
Anthropic logo
Anthropic
Medium
Product Manager

Risks of Anthropomorphizing Large Language Models in AI Products

Explain the risks of treating a large language model as if its thinking and feelings work the way a person's do. `hint Trace one projection Take one t...

Machine LearningAI Product Management
2
0
26 people solved
Apr 8, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Serialize a List of Arbitrary Strings into One String and Back, Then Compare Schemes

Two components exchange data over a channel that carries exactly one string per message. You need to send a whole list of strings through it: the send...

Software Engineering FundamentalsParsing & Interpreters
2
0
32 people solved
Sep 11, 2026
Pinterest logo
PinterestGoogleAmazon

Also asked at Amazon, Roblox, Bloomberg, Microsoft, Meta, Uber, Cisco, Citadel, MongoDB

Hard
Machine Learning Engineer Locked

Implement a Stateful Search Autocomplete Session

Implement a stateful autocomplete session that ranks matching historical sentences by frequency and lexicographic order. Process each keystroke, commi...

Coding & Algorithms
12
0
145 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
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
CVS Health logo
CVS Health
Easy
Software EngineerSenior+

Design a Public API for Hundreds of Daily External Users

Design a public API that hundreds of external users will use every day. The API's business domain is intentionally unspecified. Explain the requiremen...

System DesignAPI DesignAuthentication & Authorization
0
0
12 people solved
Jul 25, 2026
Pinterest logo
Pinterest
Medium
Software Engineer

Assign Pins to Shortest Columns

You are given a list of pins, where each pin has a height, and a fixed number of columns in a masonry-style layout. Process the pins in their original...

Coding & Algorithms
11
0
142 people solved
Apr 9, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Design a Logger with Independent Handlers

Design a logging library with independent handlers, immutable records, isolated failures, bounded backpressure, and safe runtime reconfiguration.

Software Engineering Fundamentals
23
0
295 people solved
Aug 21, 2026
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