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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
Oracle logo
Oracle
Easy
Software Engineer Locked

Approach an Unfamiliar Project Without Waiting for Complete Certainty

Describe entering an unfamiliar project by mapping the system, prioritizing unknowns, consulting experts efficiently, and making a safe first contribu...

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

Classify Reviewers Using Bayesian Probability for Accuracy Analysis

Classify Reviewers With Bayesian Probability You are auditing reviewers who may be lazy or careful. Each reviewer completes n gold-standard review tas...

Machine Learning
94
0
265 people solved
Jul 12, 2025
Meta logo
Meta
Hard
Data Scientist

Justify EU B2B Chat Product Strategy

Executive Brief Task: EU B2C Customer-Service Chat (Subscription) Context You are asked to prepare a one-page executive brief recommending whether to ...

Behavioral & Leadership
5
0
58 people solved
Oct 13, 2025
Meta logo
Meta
Easy
Data Scientist

Design measurement to detect fake accounts

Context You work on a social platform. The only product surface you can rely on is friend requests (sending/receiving/accepting/declining). Assume you...

Analytics & ExperimentationMetrics & KPIs
10
1
178 people solved
Nov 16, 2025
Uber logo
Uber
Easy
Data ScientistSenior+

Measure feature impact with switchback, PSM, and CACE

You work at a ridesharing company and want to measure the impact of a new membership feature on rides-per-user (RPU). Across the parts below you will ...

Analytics & ExperimentationCausal InferenceExperiment Design (A/B Testing)
47
0
317 people solved
Dec 11, 2025
Meta logo
Meta
Medium
Data Scientist

Assessing whether a new metric A is meaningful for News Feed

Evaluating a Proposed Proxy Metric for News Feed A partner team proposes metric A as a proxy for "meaningful interactions" in News Feed. Before adopti...

Analytics & Experimentation
30
0
103 people solved
Jul 12, 2025
Walmart Labs logo
Walmart Labs
Medium
Software Engineer Locked

Design Spring Boot for high availability and background work

This question evaluates a candidate's competency in designing highly available, load-balanced Spring Boot applications and architecting resilient back...

System DesignReliability & SRESystem Design Fundamentals
12
0
99 people solved
Jan 6, 2026
Airwallex logo
Airwallex
Medium
Data Scientist

Compute Moderation View Metrics

Question You are working on a content moderation analytics problem. You have two tables. Table 1: content_views (one row per user / post / day) - user...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
19
0
158 people solved
Nov 14, 2025
Dandy logo
Dandy
Medium
Machine Learning EngineerSenior+

How do you interpolate in 3D?

Given two points in 3D space, p0 = (x0, y0, z0) and p1 = (x1, y1, z1), how do you compute a point between them using interpolation? Define the interpo...

Software Engineering FundamentalsMath & Number Theory
11
0
92 people solved
Apr 5, 2026
Capital One logo
Capital One
Medium
Data Scientist Locked

Compute capacity, staffing trade-offs, and break-even

This question evaluates capacity-planning, bottleneck identification, labor-cost trade-offs, contractor vs overtime comparisons, break-even computatio...

Analytics & Experimentation
7
0
67 people solved
Oct 13, 2025
Google logo
Google
Hard
Software Engineer

Design a Collaborative Notes Service

Design a collaborative notes service, similar to a lightweight online document editor. Users should be able to create, read, update, delete, and share...

System Design
6
0
76 people solved
Apr 29, 2025
TikTok logo
TikTok
Medium
Data Scientist

Write SQL for geo posting-frequency drops

Using the schema below, write a single ANSI SQL query (window functions allowed) that identifies countries with the largest share of creators whose po...

Data Manipulation (SQL/Python)SQLMetric Diagnostics
12
0
100 people solved
Oct 13, 2025
PayPal logo
PayPal
Hard
Data Scientist

Design A/B Test to Measure PayPal Cashback Value

Design A/B Test to Measure PayPal Cashback Value Scenario PayPal plans to offer a targeted cashback incentive for purchases at Walmart. You need to de...

Analytics & Experimentation
3
0
65 people solved
Aug 4, 2025
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Count decodings of a numeric string

Given a string s of digits representing an encoded message where '1' maps to 'A', ..., '26' maps to 'Z', and '0' cannot appear alone (it must be part ...

Coding & Algorithms
9
0
65 people solved
Sep 6, 2025
Gemini logo
Gemini
Medium
Data Scientist

Design offline backtest and online experiment

You are given an ACH transaction-level dataset to identify and control fraud and will present a plan. Today is 2025-09-01. Deliverables - Offline anal...

Analytics & Experimentation
4
0
54 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Identify Potential Users for Instagram Shopping Tab Adoption

Evaluates how to identify likely adopters of an Instagram Shopping tab and measure whether the feature creates incremental commerce value. Strong answ...

Analytics & Experimentation
36
0
115 people solved
Jul 12, 2025
Amazon logo
Amazon
Hard
Data Scientist

Design an operations dashboard with justifications

Design an Operations Dashboard for Same-Day Delivery Station Performance Goal Create a real-time dashboard for a delivery-station manager to monitor a...

Analytics & Experimentation
7
0
57 people solved
Oct 13, 2025
Optiver logo
Optiver
Easy
Software Engineer

Compute permutations with repeated letters

Counting Strings with Repeated Characters Problem Given two nonnegative integers m and n, how many distinct strings can be formed that contain exactly...

Statistics & MathMath & Number Theory
13
1
128 people solved
Aug 13, 2025
Worldquant logo
Worldquant
Medium
Data Scientist

Find the Expected Number of Record Maxima

A permutation of the distinct values 1 through 100 is revealed from left to right. Replace the current maximum whenever the revealed value is strictly...

Statistics & Math
3
0
30 people solved
Jan 5, 2025
Coinbase logo
Coinbase
Medium
Data Scientist

Analyze Factors Behind 20% Retail Revenue Decline

Analyze a 20 Percent Retail Revenue Decline A retailer reports a 20 percent decline in revenue compared with a prior comparable period. Assume revenue...

Analytics & Experimentation
36
0
147 people solved
Jul 12, 2025
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