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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
Citadel logo
Citadel
Easy
Data ScientistIntern

Diagnose and Validate a Regression Model

You fit a regression model to predict a continuous outcome. The headline error metric looks acceptable, but the team asks whether the model is trustwo...

Statistics & Math
5
0
102 people solved
Aug 4, 2025
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Implement a nested object validator

Implement a helper function validate(object, required_style) that checks whether a possibly nested object matches a provided schema. The object may co...

Data Manipulation (SQL/Python)Parsing & Interpreters
19
0
266 people solved
Sep 6, 2025
Google logo
Google
Hard
Data Scientist

Explain logistic regression vs forests and boosting

Technical Screen — Machine Learning Answer all parts precisely. 1) Binary logistic regression: model, loss, gradient, convexity - Define the model: p(...

Machine LearningSupervised LearningML Fundamentals
21
0
177 people solved
Oct 13, 2025
Walmart Labs logo
Walmart Labs
Medium
Software Engineer Locked

Find shared courses between student pairs

This problem set evaluates data structures and algorithms competencies, covering mapping and set intersection for pairwise course overlap, permutation...

Coding & AlgorithmsArrays & StringsGrids & Matrices
15
0
135 people solved
Jan 6, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Implement Bootstrap-like responsive utility classes

Build a Bootstrap-like Utility System and Accessible Responsive Form (No External CSS) Context You are asked to create a minimal, reusable CSS utility...

Software Engineering Fundamentals
11
0
92 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Resolve Collisions Between Moving Asteroids

Resolve all collisions among asteroids moving left or right along one line, preserving survivors in original order. Use a stack to model only opposing...

Coding & Algorithms
3
0
34 people solved
Jun 4, 2026
Snapchat logo
Snapchat
Medium
Software Engineer

How do you decide with limited information?

Behavioral Question Describe a time you had to make an important decision with incomplete, ambiguous, or conflicting information. Include: - What deci...

Behavioral & LeadershipAmbiguity & Decision Making
14
0
111 people solved
Nov 26, 2025
Thumbtack logo
Thumbtack
Medium
Data Scientist

Implement min, mean, median robustly

Implement three functions in Python without using numpy/pandas: (1) my_min(nums) returning the minimum in O(n) time and O(1) space; (2) my_mean(nums) ...

Coding & Algorithms
7
0
72 people solved
Oct 13, 2025
Tesla logo
Tesla
Medium
Software Engineer

How to Identify Best Battery Group

You have historical quality data for batteries that were randomly assigned to one of 5 groups. Each battery then goes through 3 different quality test...

Machine LearningHypothesis Testing
34
0
259 people solved
Oct 26, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Flag Fraudulent Transactions by Amount and Travel Time

Flag transactions that exceed a strict amount threshold or conflict with a same-account transaction at another location within 60 minutes. The prompt ...

Coding & Algorithms
8
0
60 people solved
May 12, 2026
Amazon logo
Amazon
Medium
Data Scientist

Demonstrate problem-solving under resistance

Behavioral: End-to-End Problem Solving with Resistance (STAR) You are interviewing for a Data Scientist role. Provide a STAR-formatted response descri...

Behavioral & LeadershipLeadership & InfluenceConflict & Collaboration
13
0
108 people solved
Oct 13, 2025
Citadel logo
Citadel
Hard
Software EngineerSenior+ Locked

Choose models for trading tasks

This question evaluates a candidate's competency in selecting and reasoning about machine learning models for quantitative trading and pricing, includ...

Machine LearningML FundamentalsModel Evaluation
9
0
115 people solved
Jan 26, 2026
DoorDash logo
DoorDash
Hard
Software EngineerSenior+

Handle a payment-service incident with resource spikes

Handle a payment-service incident with resource spikes Incident Response and Resilience: Payment Integration Service Outage Context You own an interna...

Behavioral & LeadershipReliability & SREFault Tolerance & Failover
19
0
137 people solved
Jul 17, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Remove duplicates in-place from unsorted array

This question evaluates understanding of in-place array manipulation, duplicate removal, and algorithmic analysis under strict extra-space constraints...

Coding & AlgorithmsArrays & StringsSorting
10
0
108 people solved
Feb 12, 2026
Coinbase logo
Coinbase
Medium
Data Scientist Locked

Increment Digit Array

This question evaluates a candidate's competency in array manipulation and elementary arithmetic on digit sequences, including carry propagation and h...

Coding & Algorithms
4
0
66 people solved
Jan 21, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Reverse Nodes in K-Sized Groups

This question evaluates skills in manipulating singly linked lists, pointer reassignments, and performing in-place group transformations while meeting...

Coding & Algorithms
1
0
24 people solved
Jun 3, 2026
Akuna Capital logo
Akuna Capital
Medium
Software Engineer

Count inversions in an array efficiently

Given the array [5, 7, 9, 2, 3, 12, 8, 4], compute the number of inversion pairs (i, j) where i < j and arr[i] > arr[j]. Describe both a naive O(n^ 2)...

Coding & AlgorithmsSortingArrays & Strings
13
0
127 people solved
Sep 6, 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
37
0
119 people solved
Aug 4, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Explain motivation and align expectations for L4 role

Behavioral Prompt: L4 IC Data Scientist — Motivation, Plan, and Expectations Context You are interviewing onsite in a Behavioral & Leadership round fo...

Behavioral & LeadershipMotivation & FitRoadmapping & Planning
15
0
141 people solved
Oct 13, 2025
PayPal logo
PayPal
Medium
Machine Learning Engineer

Search a word in a grid

Given a 2D grid of characters and a target word, determine if the word can be traced by moving up, down, left, or right, using each cell at most once....

Coding & Algorithms
6
0
72 people solved
Sep 6, 2025
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