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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Dropbox logo
Dropbox
Medium
Software Engineer

Design a recursive distributed file crawler

Design a distributed service that crawls a large file system starting from a root path. A client should be able to call an API to start a crawl job, a...

System DesignJob Scheduling & WorkflowsDistributed Transactions & Idempotency
9
0
114 people solved
Jan 25, 2026
Apple logo
Apple
Hard
Machine Learning Engineer

Design an ML keyword recommendation pipeline

Design an ML keyword recommendation pipeline ML System Design: Typed Search Keyword Recommendations for an App Marketplace Goal Design an end-to-end M...

ML System DesignSearch RelevanceML Data Pipelines & Feature Stores
12
0
160 people solved
Jul 26, 2025
Meta logo
Meta
Medium
Data Engineer

Answer DE behavioral and ramp-up questions

Answer the following behavioral questions for a Data Engineer (or data-focused full-stack) role. Provide specific examples. 1. Project under a tight d...

Behavioral & LeadershipOwnership & ExecutionConflict & Collaboration
7
0
87 people solved
Mar 1, 2026
Bnp logo
Bnp
Easy
Data Scientist

What are linear regression assumptions?

You fit an ordinary least squares (OLS) linear regression model. 1) What are the key assumptions behind OLS (for unbiasedness and for valid inference)...

Machine Learning
5
0
45 people solved
Jan 5, 2026
Uber logo
Uber
Medium
Data ScientistNew Grad Locked

Evaluate a cold-start rating launch

This question evaluates a data scientist's competency in marketplace analytics, causal inference, experimentation design and measurement, specifically...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
21
0
295 people solved
Apr 6, 2026
Dropbox logo
Dropbox
Medium
Software Engineer Locked

Build a hit/miss word guessing game

This question evaluates implementation skills in managing stateful systems and data structures for pattern matching, as well as algorithmic and advers...

Coding & AlgorithmsLow-Level Design (OOP)Simulation & State Machines
9
0
175 people solved
Jan 22, 2026
Meta logo
Meta
Medium
Software Engineer

Design LRU cache and pick k closest points

Design LRU cache and pick k closest points 1) Design a fixed-capacity in-memory cache that evicts the least recently used key when full. Support get(k...

Coding & Algorithms
7
0
72 people solved
Jul 29, 2025
Google logo
Google
Medium
Software EngineerNew Grad

Describe teamwork and personal achievements

The interview included several behavioral questions: 1. Tell me about a time you helped a teammate who was underperforming. 2. Describe the most chall...

Behavioral & LeadershipMentoring & Team GrowthProject Deep Dive
23
0
245 people solved
Apr 1, 2026
Google logo
Google
Easy
Software Engineer

Describe conflict, ambiguity, and process improvement

Prepare STAR-style responses for these behavioral prompts: - Tell me about a time you had a conflict with your manager. - Tell me about a time you imp...

Behavioral & Leadership
9
0
74 people solved
Jan 1, 2026
Instacart logo
Instacart
Hard
Data Scientist

Diagnose Sunday Miami same‑day outages

Marketplace stability case: same‑day disablement on Sunday afternoons (Miami) Context Instacart offers two fulfillment modes: - Same‑day delivery (rea...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
8
0
100 people solved
Oct 13, 2025
Uber logo
Uber
Medium
Software Engineer

Find a Bounded Subarray and Largest Square

Implement the following two independent coding tasks. Task A: Longest bounded-range subarray Given an integer array nums and an integer limit, return ...

Coding & Algorithms
3
0
30 people solved
Apr 12, 2026
Uber logo
Uber
Medium
Data Scientist

Write SQL for fares and age-band counts

You have two tables. Schema: - drivers(driver_id VARCHAR PRIMARY KEY, name VARCHAR, date_of_birth DATE) - trips(trip_id VARCHAR PRIMARY KEY, driver_id...

Data Manipulation (SQL/Python)SQL
4
1
51 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Hard
Data Scientist

Implement CUDA-tiled matrix multiplication and explain architecture

CUDA FP32 GEMM Design Task Implement a high-performance CUDA kernel for matrix multiplication C = A · B where: - A is m×k, B is k×n, C is m×n - Data t...

Coding & AlgorithmsProgramming Languages
18
0
132 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Explain why join C1 and your impact

Why Capital One (C1)? Behavioral/Leadership Prompt for a Data Scientist Task Provide a concise, evidence-based answer that: 1. Gives 2–3 specific, ver...

Behavioral & Leadership
8
0
59 people solved
Oct 13, 2025
Disney logo
Disney
Medium
Data Scientist

Solve matrix add, frequency count, longest consecutive

You are asked to solve the following 3 coding tasks (in any language). Implement each as a function. 1) Add two matrices Input: Two 2D integer arrays ...

Coding & Algorithms
8
0
58 people solved
Sep 13, 2025
PayPal logo
PayPal
Medium
Data Scientist

Explain past experience and role fit

Explain past experience and role fit Behavioral Prompt: Risk/Fraud Analytics Experience and Role Alignment Context You are interviewing onsite for a D...

Behavioral & LeadershipMotivation & FitProject Deep Dive
12
0
90 people solved
Jul 31, 2025
TikTok logo
TikTok
Medium
Data Scientist

Implement K-means and run two iterations

Given points P={(0,0),(0,2),(2,0),(2,2),(8,8),(8,10),(10,8),(10,10)} and k=2, (1) initialize centroids with k-means++ using seed=42 and Euclidean dist...

Coding & Algorithms
6
0
68 people solved
Oct 13, 2025
Instacart logo
Instacart
Medium
Software Engineer

Pivot data without date libraries

Transform a tall dataset into a wide, pivoted view without using any date/time libraries. Input: a list of records (date, store_id, metric, value) whe...

Data Manipulation (SQL/Python)
2
0
24 people solved
Jul 31, 2025
Shopify logo
Shopify
Medium
Data Scientist

Justify and harden your analytics and BI stack

List your current analytics tech suite end-to-end (ingestion, storage/warehouse, transformation, orchestration, catalog/lineage, experimentation platf...

Data Manipulation (SQL/Python)Transformation Layers & Semantic ModelsData Governance & Lineage
8
0
98 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Data Scientist

Decide best email variant using stratified A/B analysis

Stratified A/B Test Across Two Strata (Week/Location) You ran an email A/B test across two strata defined by week/location. Each user receives at most...

Analytics & ExperimentationExperiment Analysis & ReadoutHypothesis Testing
9
0
93 people solved
Oct 13, 2025
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