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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
IBM logo
IBM
Medium
Software Engineer Locked

Count Tree Vertices with Pythagorean Distances

Count tree vertices whose positive distances to three fixed vertices form a Pythagorean triple, including distance ordering and large-tree edge cases.

Coding & AlgorithmsTreesGraphs
11
0
141 people solved
Aug 31, 2026
Confluent logo
Confluent
Medium
Software Engineer

Motivation and Readiness for a Developer Productivity Role from a Customer-Facing Team

This is a values-alignment behavioral round with the hiring manager. The conversation walks through your past work experience to judge how well your b...

Behavioral & LeadershipMotivation & Fit
2
0
34 people solved
Sep 12, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Count Matrix Cells Whose Row and Column Neighbors Match

This Hudson River Trading software engineering question asks candidates to count matrix cells whose row and column neighbors match. It is useful for p...

Software Engineering FundamentalsGrids & Matrices
23
0
245 people solved
Jul 2, 2026
Databricks logo
Databricks
Medium
Software Engineer

Track Customer Revenue and Referral Revenue

Track Customer Revenue and Referral Revenue Problem Implement a top-level function that processes an in-memory customer revenue tracker through a lite...

Coding & Algorithms
14
2
174 people solved
Apr 18, 2026
Google logo
GoogleBloombergMicrosoft

Also asked at Microsoft, Meta, Amazon, IBM

Medium
Software Engineer

Report Consecutive Historical Price Spans as Quotes Arrive

Problem Implement StockSpanner() and next(price). Each next call appends today's price and returns the longest suffix of days, including today, whose ...

Coding & AlgorithmsData Structure DesignStacks & Queues
1
0
16 people solved
DoorDash logo
DoorDash
Hard
Software Engineer Locked

Debug the Last-Element Random Allocation Case

Examine the subtle self-swap-and-pop edge case in an O(1) random allocator and build deterministic regression tests around it.

Software Engineering Fundamentals
16
0
106 people solved
Sep 1, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+ Locked

Keep Stable Unique Column Names Across Schema Changes

Maintain stable case-insensitive unique column names across additions, removals, reordering, reappearance, and natural suffix collisions, with indepen...

Coding & AlgorithmsData Structure DesignArrays & Strings
4
0
42 people solved
Aug 30, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a Power-Plant System from an Underspecified Prompt

Practice turning an underspecified power-plant design topic into explicit requirements, estimates, APIs, schemas, distributed jobs, queues, and failur...

System Design
19
0
165 people solved
Aug 15, 2026
Capital One logo
Capital One
Medium
Software Engineer

Block-Building Operations: Check Whether a Free Segment Starts at a Position

Positions on a number line start out empty. Process a list of operations in order: - [1, x]: build a block at position x. - [2, x, k]: check whether s...

Coding & AlgorithmsBinary Search
2
0
26 people solved
Aug 4, 2026
Snapchat logo
Snapchat
Medium
Data Scientist Locked

Calculate Average Camera Switches per Session

Calculate average front-to-rear camera switches per session in PostgreSQL. Use LAG, preserve one-event sessions in the denominator, and avoid integer-...

Data Manipulation (SQL/Python)
8
0
77 people solved
Aug 13, 2026
Apple logo
Apple
Medium
Software Engineer

Distinguish Endpoint and Survival Probabilities in a 3D Diagonal Walk

A walk starts at an integer position (x,y,z) in an8x8x8 grid, with0<=x,y,z<8. On each step it independently chooses one of the eight vectors (±1,±1,±1...

Statistics & MathProbabilityDynamic Programming
0
0
11 people solved
Aug 26, 2026
Google logo
GoogleMicrosoftBloomberg

Also asked at Bloomberg, Amazon, Meta, Salesforce

Hard
Software Engineer

Count Decimal One Digits up to a Bound

Problem Count all appearances of decimal digit 1 in the ordinary spellings of integers from 0 through n, inclusive. Count occurrences, not merely how ...

Coding & AlgorithmsMath & Number Theory
0
0
13 people solved
OpenAI logo
OpenAI
Medium
Product Manager

Detecting and Mitigating Harmful Bias in an AI System: A PM's Plan

As a product manager at OpenAI, how would you keep an AI system you are responsible for from reinforcing harmful biases? `hint Name the harm before th...

Machine LearningAI Product ManagementFairness & Bias
3
0
24 people solved
Aug 18, 2026
Infosys logo
InfosysGoogleAmazon

Also asked at Amazon, Bloomberg, TikTok

Medium
Software Engineer

Best Total After Bounded Block Replacement

Problem Split arr into nonempty contiguous blocks, each containing at most k elements. Replace every element in a block by that block's largest origin...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
11 people solved
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Deshaw, MathWorks, Meta, Goldman Sachs, Bloomberg, eBay, Zeta Global, Uber, DP world, Nutanix, 6Sense

Hard
Software Engineer

Minimize Cameras That Cover a Tree Node and Its Neighbors

Problem A camera installed on a tree node monitors that node, its parent if present, and its immediate children. Return the fewest cameras needed to c...

Coding & AlgorithmsTreesDynamic Programming
1
0
14 people solved
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, AppLovin, Meta, Bloomberg, Goldman Sachs, Agoda, Microstrategy, Roku, Salesforce, Wells Fargo

Easy
Software Engineer

Compare Two Backspace-Edited Strings

Problem Type each string into a separate empty editor. Lowercase letters append themselves and deletes the latest remaining character, doing nothing w...

Coding & AlgorithmsTwo Pointers & Sliding WindowStacks & Queues
1
0
12 people solved
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
22
3
159 people solved
Aug 28, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

gRPC vs HTTP, and HTTP/1.1 vs HTTP/2 vs HTTP/3 compared

The same infrastructure loop asked protocol fundamentals: compare HTTP/1.1, HTTP/2 and HTTP/3, and compare gRPC with plain HTTP. Answer as an engineer...

Software Engineering FundamentalsNetworkingAPI Design
0
0
10 people solved
Sep 11, 2026
Google logo
GoogleUberAmazon
Medium
Software Engineer

First Timestamp When All People Are Connected

Problem People are labeled 0 through n-1. A log [timestamp,x,y] adds a symmetric friendship between x and y, which persists. Acquaintance includes fri...

Coding & AlgorithmsGraphsSorting
0
0
13 people solved
Attentive logo
Attentive
Medium
Software Engineer

Find Inclusive Index Ranges for Time-Window Queries on Timestamp-Sorted Logs

A service stores the timestamps of its log entries in an array sorted in non-decreasing order, so entry i has timestamp timestamps[i]. The same log is...

Coding & AlgorithmsBinary Search
8
0
61 people solved
Sep 7, 2026
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