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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
Uber logo
Uber
Medium
Product Manager

Shared-Ride Trade-offs at Uber: Riders, Drivers and Matching Rules for UberPool

You are a PM at Uber designing UberPool, the option where riders heading in a similar direction share one car and each pays less than for a private ri...

Product Design & StrategyProduct Design & ImprovementGrowth & Monetization
1
0
13 people solved
Nov 18, 2025
Amazon logo
Amazon
Medium
Software Engineer

Discuss key behavioral experiences

Behavioral Interview (Onsite) — Software Engineer You are preparing for an onsite behavioral and leadership interview. Answer the following prompts us...

Behavioral & Leadership
11
0
104 people solved
Sep 6, 2025
The New York Times logo
The New York Times
Medium
Product Manager

Telling Stakeholders Unwelcome News: Timing, Framing and Follow-Through as a PM

Sooner or later every product manager has to tell stakeholders something they will not want to hear. In a product manager interview, you are asked how...

Behavioral & LeadershipCommunication & Stakeholders
0
0
9 people solved
Apr 12, 2026
Optiver logo
Optiver
Medium
Quantitative Trader

Answer English HR classics

Answer English HR classics Behavioral Interview: Data Scientist (Technical Screen) Context: You are interviewing for a Data Scientist role at Optiver ...

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making
19
0
231 people solved
Aug 7, 2025
Glean logo
Glean
Easy
Data Scientist

What are sum expectation and variance?

Let random variables X and Y have finite means and variances. How do you compute: 1. The expectation of X + Y 2. The variance of X + Y Your answer sho...

Statistics & Math
8
0
85 people solved
Jan 11, 2026
ByteDance logo
ByteDance
Medium
Software EngineerIntern Locked

Enumerate All Simple Directed Cycles

Enumerate distinct simple directed cycles using a canonical representation that handles rotations, opposite directions, and self-loops.

Coding & AlgorithmsGraphsBacktracking & Recursion
3
0
43 people solved
Aug 23, 2026
Google logo
Google
Medium
Data Scientist

Define and sample a truncated normal

Define the truncated normal Z | a < Z < b for Z ~ N(0,1): write the normalized pdf and cdf. Then design efficient samplers for three cases: (i) a = 1,...

Statistics & Math
9
0
107 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Maximum Gap Between Consecutive Workers' Stations

Maximum Gap Between Consecutive Workers' Stations You are given strings skill and station. Worker i requires the skill skill[i], and station j support...

Coding & AlgorithmsGreedyTwo Pointers & Sliding Window
0
0
6 people solved
Apple logo
Apple
Medium
Data Scientist

Investigate Conversion Drop: Metrics, Analyses, Techniques Explained

Investigating a Conversion Drop After a Feature Release A new feature was released on an e-commerce platform. Shortly after release, overall checkout ...

Analytics & ExperimentationMetric DiagnosticsCausal Inference
35
0
155 people solved
Jul 12, 2025
Microsoft logo
Microsoft
Medium
Machine Learning EngineerIntern

Return the k most frequent values in an array with a deterministic tie rule

Given an integer array nums and an integer k, return the k values that occur most often in nums. Rank the distinct values of nums by frequency (number...

Coding & AlgorithmsHeaps & Priority QueuesSorting
2
0
24 people solved
Feb 5, 2026
Uber logo
Uber
Medium
Machine Learning Engineer

Implement 1D convex minimization in Python

Question Implement, in Python, an algorithm that minimizes a 1D black-box convex function F(x) over a closed interval [a, b]. Assume F is convex (henc...

Machine LearningML CodingBinary Search
27
0
227 people solved
Sep 6, 2025
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist

Solve animals-and-legs count

Barn Legs Puzzle (Linear Equations) Convert the word problem into a small system of linear equations and solve. You have a barn with three types of an...

Statistics & MathPuzzles & BrainteasersMath & Number Theory
23
0
164 people solved
Aug 11, 2025
Google logo
Google
Hard
Software Engineer Locked

Return top-k subset sums in descending order

This question evaluates proficiency in combinatorial reasoning, algorithmic optimization for large search spaces, and efficient extraction of top-k va...

Coding & AlgorithmsHeaps & Priority Queues
21
1
170 people solved
Jan 7, 2026
Google logo
Google
Medium
Machine Learning Engineer

Explain LLM lifecycle and trade-offs

Explain the end-to-end lifecycle of a modern large language model. Cover training data collection and filtering, pretraining objectives, transformer a...

Machine LearningTransformers & AttentionFine-Tuning & Alignment Techniques
20
1
217 people solved
Jan 19, 2026
Discord logo
Discord
Medium
Product Manager

Making a Product-Grounded Case for Joining Discord as a Product Manager

In an interview for a product manager role at Discord, you are asked why you want to work there. Give your answer. `hint Start from the product, not t...

Behavioral & LeadershipMotivation & Fit
1
0
11 people solved
Dec 18, 2025
CVS Health logo
CVS Health
Medium
Data Scientist

Use pandas to aggregate, pivot, and label

Given two pandas DataFrames, write code to: (1) merge and aggregate revenue; (2) produce a 2x2 pivot; (3) compute per-state counts with value_counts, ...

Data Manipulation (SQL/Python)Pandas & Python Data
14
0
250 people solved
Oct 13, 2025
Google logo
Google
Easy
Software Engineer Locked

Build a next-word frequency predictor

This question evaluates understanding of data structures and algorithms for frequency counting and associative lookups, including preprocessing-versus...

Coding & AlgorithmsData Structure Design
48
2
338 people solved
Feb 12, 2026
DoorDash logo
DoorDash
Medium
Data Scientist

Investigate Pop-up Impact on Partner Referral Conversions

Investigate Pop-up Impact on Partner Referral Conversions Partner-Referral Conversions Fell After App Pop-up: Diagnose, Quantify, and Decide Context Y...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
12
0
135 people solved
Aug 4, 2025
Reddit logo
Reddit
Easy
Machine Learning Engineer

Design a Comment Ranking System for Threaded Post Discussions

Design the system that ranks the comments under a post on a large online discussion platform. Assume users write comments on posts, reply to each othe...

ML System DesignRanking ModelsModel Evaluation
0
0
2 people solved
Aug 13, 2026
Atlassian logo
Atlassian
Medium
Data Scientist

Demonstrate motivation, feedback, and prioritization

Behavioral & Leadership STAR Prompts (Data Scientist — Technical Screen) Context: You are preparing for a Data Scientist technical screen at Atlassian...

Behavioral & Leadership
10
0
92 people solved
Oct 13, 2025
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