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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Solve Merge Lists and Vertical Traversal

This question evaluates proficiency with merging sorted linked lists and performing vertical traversal of binary trees, focusing on algorithms, data s...

Coding & Algorithms
8
0
63 people solved
Feb 28, 2026
LinkedIn logo
LinkedIn
Easy
Data Scientist Locked

How do you sample uniformly from an infinite stream?

This question evaluates understanding of streaming algorithms, randomized sampling and probability, and algorithmic space–time trade-offs involved in ...

Coding & AlgorithmsProbabilityMath & Number Theory
14
0
148 people solved
Feb 1, 2026
Wells Fargo logo
Wells Fargo
Medium
Data Scientist

Explain PD model validation steps

Explain PD model validation steps Validate a Newly Developed Probability of Default (PD) Model Context Assume you have built a retail credit Probabili...

Machine LearningModel EvaluationModel Monitoring & Drift
10
0
202 people solved
Jul 26, 2025
Point72 logo
Point72
Easy
Data ScientistIntern

Find kth missing integer and redundant operations

You are given two independent coding tasks. Task 1: K-th missing number You are given an integer array nums (not necessarily sorted) containing distin...

Coding & Algorithms
13
0
94 people solved
Oct 20, 2025
Google logo
Google
Medium
Data Scientist

Estimate percentile from buckets

You are given an approximate histogram of search-query frequencies. Each bucket i is represented as (left_bd_i, right_bd_i, bucket_count_i), where buc...

Statistics & Math
12
0
90 people solved
Feb 5, 2025
XPeng logo
XPeng
Hard
Machine Learning Engineer

Design and train a PPO pipeline

End-to-End PPO Training: Describe Your Pipeline You are asked to explain, in concrete and reproducible terms, how you trained a policy with Proximal P...

ML System Design
8
0
104 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Solve increasing sequence and path problems

Solve increasing sequence and path problems Answer the following related tasks about increasing sequences and paths: a) Contiguous subarray: Given an ...

Coding & Algorithms
6
0
55 people solved
Jul 26, 2025
Chime logo
Chime
Hard
Data Scientist

Design and Analyze A/B Test for Recommendation Widget

Design and Analyze A/B Test for Recommendation Widget Scenario You are designing and analyzing an online A/B test for launching a new recommendation w...

Analytics & Experimentation
77
0
185 people solved
Aug 4, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Derive MLP shapes and explain PyTorch broadcasting

This question evaluates understanding of tensor shapes, linear layer forward computation, and deep-learning-framework broadcasting semantics. It is co...

Machine Learning
8
0
74 people solved
Jan 14, 2026
Meta logo
Meta
Hard
Machine Learning Engineer

Design nearby place recommendations

Real‑Time Nearby Places Recommendation System Context Design a mobile feature that recommends nearby places (e.g., restaurants, shops, attractions) to...

ML System DesignRecommendation SystemsGeo & Delivery Systems
10
1
136 people solved
Sep 6, 2025
Axon logo
Axon
Hard
Software Engineer

Design an e-commerce analytics warehouse

Design an Analytics Warehouse for an E‑commerce Platform Context An e‑commerce platform exposes the following user-facing services: - Item search - It...

Analytics & ExperimentationWarehouse & Lakehouse ArchitectureData Ingestion & CDC
11
0
113 people solved
Sep 6, 2025
Coinbase logo
Coinbase
Medium
Data Scientist

Design Identity-Trust A/B Test

You are interviewing for a Data Scientist role on an Identity & Trust team at a consumer product company. The team wants to launch a feature that stre...

Analytics & Experimentation
8
0
70 people solved
Feb 13, 2026
TikTok logo
TikTok
Hard
Data Scientist

Control confounding in observational ad lift

Estimating the ATE of Ad Exposure on Conversions (Observational Setup) You cannot randomize ad exposure. Users differ in age, education, income, and o...

Statistics & Math
9
0
72 people solved
Oct 13, 2025
Aeonea logo
Aeonea
Medium
Software Engineer

Discuss past project experiences and impact

Behavioral: Impactful Project Deep-Dive (Software Engineer — Technical Screen) Walk through one of your most impactful projects. Address the following...

Behavioral & Leadership
4
0
73 people solved
Sep 6, 2025
Instacart logo
Instacart
Hard
Data Scientist

Compute duration and stopping rules correctly

Experiment Runtime Planning: Same‑Day Delivery Attach Rate You are planning an A/B test on the same‑day delivery attach rate (the proportion of eligib...

Analytics & ExperimentationExperiment Design (A/B Testing)Sequential & Adaptive Testing
14
0
141 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software Engineer

Design a bank system with scheduled transfers

Bank System (OOD): Accounts, Transfers, Scheduling, Top Spending, Merge Design an in-memory banking system that supports: - account creation - deposit...

Coding & Algorithms
4
0
68 people solved
Feb 11, 2026
Fannie Mae logo
Fannie Mae
Medium
Data Scientist

Assess SQL joins, unions, windows, dedup, and pandas

Using the schema and sample data below, answer all sub-questions. Unless stated, assume ANSI SQL and explain any dialect-specific choices. Schema: - c...

Data Manipulation (SQL/Python)
1
0
18 people solved
Oct 13, 2025
CVS Health logo
CVS Health
Hard
Data Scientist

Design an email flu-shot experiment

End-to-End Experiment Design: Email Campaign to Increase Verified Flu Vaccinations Context: You are designing a 30-day email campaign to increase veri...

Analytics & Experimentation
8
0
65 people solved
Oct 13, 2025
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Explain motivation and background

Explain motivation and background Behavioral Phone Screen — Software Engineer Context You are in a technical phone screen for a Software Engineer role...

Behavioral & LeadershipMotivation & Fit
15
0
137 people solved
Aug 4, 2025
Google logo
Google
Medium
Data Scientist

Adjust YouTube Ad Scores Using Mixed-Effects Linear Regression

Adjusting YouTube Ad Scores with Mixed-effects Regression One hundred reviewers each rate the same 100 YouTube ads on a 1 to 10 scale. Some reviewers ...

Machine LearningRegression & Statistical Modeling
13
0
132 people solved
Jul 12, 2025
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