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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Capital One logo
Capital One
Medium
Data Scientist

Handle an irate passenger after flight delay

Role-Play: Irregular Operations Recovery and Communication Plan Scenario - A flight is delayed 5 hours due to a crew time-out cascading from weather a...

Behavioral & LeadershipCommunication & StakeholdersConflict & Collaboration
12
0
168 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Check path in N-ary tree

Given the root of an N-ary tree and a sequence of integers path[0..k-1], determine whether there exists a path starting at the root whose node values ...

Coding & Algorithms
4
0
79 people solved
Sep 6, 2025
DRW logo
DRW
Easy
Quantitative Trader

Compute expected arc length on a circle

On the unit circle (radius \(1\), centered at the origin), pick three points independently and uniformly at random on the circumference. These three p...

Statistics & MathProbability
7
0
108 people solved
Nov 22, 2025
Amazon logo
Amazon
Medium
Data Scientist

Optimize XGBoost for Predicting Marketing Outcomes

Optimize XGBoost for Predicting Marketing Outcomes Gradient-Boosted Trees for Marketing Outcome Prediction Context You’re building a model to predict ...

Machine Learning
36
0
113 people solved
Aug 4, 2025
HubSpot logo
HubSpot
Medium
Software Engineer

Find spammer with minimal hasMessaged calls

Question You have n accounts labeled 0..n-1 and an oracle API: ` boolean hasMessaged(a, b) // true iff account a has sent at least one message to ac...

Coding & AlgorithmsGraphs
22
0
197 people solved
Aug 14, 2025
MathWorks logo
MathWorks
Easy
Software Engineer

Minimize shortest path by adding weight-1 edges

You are given a weighted directed graph with nodes labeled 1..n. The existing edges are described by three arrays of equal length m: - from[i]: start ...

Coding & Algorithms
4
0
66 people solved
Mar 1, 2026
Google logo
Google
Medium
Software Engineer

Design server allocation for multi-type nodes

Design a service to manage a large pool (about 100, 000) of server nodes. Each node can satisfy multiple instance types; clients call getServer(reqNum...

Coding & AlgorithmsSystem Design FundamentalsData Structure Design
11
0
182 people solved
Sep 6, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Implement 2D convolution using NumPy slicing

Implement 2D convolution on a 4×4 input and a 3×3 filter with stride 1 using NumPy. Avoid explicit Python loops by relying on array slicing, broadcast...

Data Manipulation (SQL/Python)
5
0
36 people solved
Sep 6, 2025
Snapchat logo
Snapchat
Medium
Machine Learning Engineer Locked

Design an ads ranking ML system

This question evaluates a candidate's ability to design a low-latency ads ranking machine learning system, including feature engineering and freshness...

ML System DesignCTR Prediction & Ads MLRanking Models
14
0
111 people solved
Feb 11, 2026
Oracle logo
Oracle
Easy
Site Reliability Engineer Locked

Mitigate an Emergency During On-Call

Tell an on-call emergency story from alert confirmation through reversible mitigation and verified recovery. The response should distinguish immediate...

Behavioral & Leadership
1
0
12 people solved
May 24, 2026
Airbnb logo
Airbnb
Medium
Data Scientist

Analyze A/B Test Results to Inform Stakeholder Decisions

Analyze A/B Test Results to Inform Stakeholder Decisions You receive raw log-level event data from an A/B test on a consumer booking funnel. You must ...

Analytics & ExperimentationExperiment Analysis & ReadoutData Cleaning & Wrangling
35
0
223 people solved
Jul 12, 2025
ByteDance logo
ByteDance
Medium
Site Reliability EngineerSenior+ Locked

Solve Stack and String Shift Problems

This two-part question evaluates proficiency with core data structures and string/array algorithms—specifically stack-based delimiter matching and cum...

Coding & Algorithms
8
0
62 people solved
May 27, 2026
Capital One logo
Capital One
Medium
Data Scientist

Assess card rewards profitability and break-even spend

Credit Card Unit Economics and Break-even Spend Context A bank is evaluating launching a credit card that pays 1% rewards on all purchases. Consider p...

Analytics & ExperimentationBusiness Case Analysis
7
0
99 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Find the Minimum Delivery Processing Speed

Find the minimum positive integer processing speed that completes indivisible delivery orders within a whole-hour deadline, or report impossibility wh...

Coding & Algorithms
3
1
35 people solved
May 26, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Describe a System Improvement You Identified and Delivered

Describe a system improvement you identified and delivered, from the original behavior and discovery through design, rollout, and evidence that the ch...

Behavioral & Leadership
1
0
15 people solved
Aug 7, 2026
Voleon logo
Voleon
Hard
Machine Learning EngineerSenior+

Explain the Bellman Equation

Explain the Bellman Equation State and explain the Bellman expectation and optimality equations. Show how they decompose value into immediate reward a...

Machine Learning
2
0
34 people solved
Jul 31, 2025
Capital One logo
Capital One
Medium
Data Scientist

Analyze ad watch-time with Excel pivots

You are given a flat file with these columns: Date (Excel date, no time zone), UserID, AdID, WatchSeconds (integer ≥ 0), Clicks (integer ≥ 0). Using o...

Analytics & ExperimentationBI & Reporting SystemsMetrics & KPIs
6
0
115 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Software Engineer

Design a cross-region event processing platform

Scenario Design a cross-region event processing platform that ingests events from producers, stores them durably, and delivers them to multiple consum...

System DesignMessaging & Event-DrivenFault Tolerance & Failover
22
0
254 people solved
Dec 25, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Design Data Structure for Sparse Matrices Operations

Scenario Analytics engine stores extremely sparse numeric matrices. Question Design a data structure to store two sparse matrices and implement print(...

Coding & Algorithms
17
0
73 people solved
Jul 12, 2025
Google logo
Google
Hard
Data Scientist Locked

Design an Unbiased Upgrade Experiment

This question evaluates understanding of causal inference, experiment design, and metric selection in product analytics, including defining causal est...

Analytics & ExperimentationCausal Inference
23
0
167 people solved
Dec 29, 2025
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