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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026
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
IBM logo
IBM
Medium
Software Engineer Locked

Maximize Revenue from Depleting VM Stock

Practice maximizing revenue by repeatedly selling from the highest remaining VM stock, including harmless ties and large counts.

Coding & Algorithms
17
3
121 people solved
Aug 28, 2026
Jane Street logo
Jane Street
Easy
Software EngineerNew Grad

Transform sparse time-code stream to dense rows

Problem You are given: - A fixed set of M distinct codes (strings). The column order of the output matrix is the lexicographic order of these codes. -...

Coding & AlgorithmsData Structure Design
144
1
1097 people solved
Feb 12, 2026
NVIDIA logo
NVIDIA
Medium
Applied ScientistIntern

Research Project Deep Dive and Your AI-Agent Research Workflow

This is a 45-minute technical phone interview for a research internship. After about 10 minutes of introductions on both sides, the interviewer spends...

Behavioral & LeadershipProject Deep Dive
2
0
17 people solved
Sep 15, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Review Constant-Time Random Courier Selection and Removal

Review a delivery-assignment service that stores couriers in dasher_map under contiguous integer keys starting at 0. add_dasher inserts a courier. pic...

Software Engineering FundamentalsData Structure Design
2
0
25 people solved
Sep 5, 2026
Tekion logo
Tekion
Medium
Software EngineerSenior+

Find an Optimal Strategy for an Even-Row Coin Game

A and B play a game with an even number of coins arranged in a row. They alternate turns, with A moving first. On each turn, the player takes one coin...

Statistics & MathDynamic ProgrammingMath & Number Theory
4
0
32 people solved
Sep 10, 2026
Digitalocean logo
Digitalocean
Medium
Software Engineer

Design a Multi-Organization Advertising Platform with Performance Statistics

Design an advertising platform that displays ads from multiple organizations and collects statistics to compare which ads perform better or worse. Con...

System DesignAds Systems
1
0
18 people solved
Sep 16, 2026
Waymo logo
Waymo
Medium
Software Engineer

In-Place Rectangle Copy Within a 2D Array Using O(1) Extra Memory

You are given a 2D array grid and a rectangular block inside it: the block has height rows and width columns and its top-left cell is (src_row, src_co...

Coding & AlgorithmsGrids & Matrices
2
0
32 people solved
Sep 10, 2026
Meta logo
Meta
Hard
Software Engineer

Design Friend Recommendations for a Large Friendship Graph

Design a friend-recommendation algorithm given a list of users and friendship pairs. Explain a recommendation strategy, its ranking policy, and how yo...

Software Engineering FundamentalsGraphs
4
0
35 people solved
Sep 4, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Design a Windows App Notification System While Working With an AI Assistant

Design the notification system for the Windows operating system: the platform component that lets many different applications generate notifications a...

System DesignSystem Design Fundamentals
1
0
21 people solved
Sep 6, 2026
Aurora logo
Aurora
Hard
Machine Learning EngineerSenior+

Pitching an LLM-for-Autonomy Initiative to Leadership to Win Scope

After a long discussion about applying large language models to autonomous driving, the interviewer asks a pointed follow-up: suppose we now want to w...

Behavioral & LeadershipLeadership & Influence
2
0
14 people solved
Sep 23, 2026
UiPath logo
UiPath
Medium
Machine Learning Engineer

Reduce overfitting and explain the mean squared error loss

A machine learning phone screen asks several short conceptual questions in quick succession. Two of them are reconstructed below: how to reduce overfi...

Machine LearningML Fundamentals
0
0
8 people solved
Sep 28, 2026
Upstart logo
Upstart
Medium
Software Engineer

Check Whether Two Words Are Case-Insensitive Anagrams

Determine whether two words are anagrams, ignoring letter case. Anagrams contain the same letters with the same multiplicities, possibly in a differen...

Coding & AlgorithmsArrays & Strings
3
0
26 people solved
Sep 12, 2026
Jump Trading logo
Jump Trading
Easy
Software Engineer Locked

Identify Files That Need Synchronization

Identify source files requiring synchronization by parsing metadata, checking source readability, destination presence and writability, and size or mo...

Coding & Algorithms
19
0
156 people solved
Aug 12, 2026
Squarepoint logo
Squarepoint
Medium
Quantitative Researcher Locked

Choose Between an Array and a Linked List

Compare arrays and linked lists beyond Big O notation. Cover cache locality, allocation and pointer overhead, reference stability, and practical choic...

Software Engineering Fundamentals
6
0
51 people solved
Aug 29, 2026
Valon logo
Valon
Medium
Software Engineer

Loan Ledger: Fee-First Payments and Out-of-Order Event Processing

You are implementing a simplified loan-accounting component. Loan accounting tracks the state of a loan over time, and this version tracks only two fi...

Software Engineering FundamentalsData Structure Design
0
0
7 people solved
Sep 24, 2026
Quora logo
Quora
Medium
Data Scientist

Measure the Health and Effectiveness of an Add-Question Button

Measure the Health and Effectiveness of an Add-Question Button A question-and-answer platform wants reporting metrics for the health and effectiveness...

Analytics & ExperimentationMetrics & KPIsUser Behavior & Funnels
1
0
14 people solved
Sep 27, 2026
Instacart logo
Instacart
Medium
Software Engineer

Design a Grocery-Ordering Backend with Reliable Inventory Reservations

Design the backend of a simplified grocery-ordering service, focusing on inventory. Explain how products and store-level stock are represented, how or...

System DesignSystem Design FundamentalsTransactions & Isolation
2
0
27 people solved
Sep 11, 2026
Tradedesk logo
Tradedesk
Medium
Frontend Engineer

Debug a Frontend Component That Shows Wrong API Results

A front-end component sends an API request whenever its input changes and displays the response. Users report that the results on screen are sometimes...

Software Engineering FundamentalsDebugging
1
0
16 people solved
Sep 15, 2026
MongoDB logo
MongoDB
Medium
Software EngineerSenior+

Reason About Recursive Key Search in Nested JSON

Reason About Recursive Key Search in Nested JSON Given an in-memory JSON-like object whose values may include strings, numbers, booleans, lists, or ne...

Software Engineering Fundamentals
4
1
72 people solved
Aug 18, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Find the Earliest Contiguous Removal That Balances Index Sums

Implement smallest_balanced_removal(nums, k) for an integer array nums and an integer k satisfying 1 <= k <= len(nums). Use the exact integer represen...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
4
0
82 people solved
Sep 9, 2026
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