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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
PayPal logo
PayPal
Medium
Data Scientist

Calculate and Find Average Contacts and Sync Percentage

dw_peers +--------------+---------------+-------------+ | user_id | synced_contact| date_synced | +--------------+---------------+-------------+ ...

Data Manipulation (SQL/Python)
1
0
18 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Software Engineer

Implement right side view and local minimum search

Question LeetCode 199. Binary Tree Right Side View — Given the root of a binary tree, return the values of the nodes you can see ordered from top to b...

Coding & Algorithms
32
0
98 people solved
Jul 29, 2025
Capital One logo
Capital One
Medium
Data Scientist

Perform and justify t-tests

A/B Test: Compare Mean Watch Time Between Variants A and B Context: You ran an A/B test measuring per-user daily watch_time (in seconds). You obtained...

Statistics & Math
5
0
56 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Find concatenated words in list

Question LeetCode 472. Concatenated Words – Given an array of strings words, return all words that are concatenations of at least two shorter words al...

Coding & Algorithms
7
0
52 people solved
Aug 4, 2025
Uber logo
Uber
Hard
Data Scientist

Select the better $5 promo-targeting model

Coupon Targeting Under a Daily Budget: Policy, OPE, Calibration, and Monitoring Context - You have two user-scoring models for a $5 coupon: M0 (curren...

Machine Learning
10
0
81 people solved
Oct 13, 2025
SoFi logo
SoFi
Medium
Software Engineer

Design a key-value store with getLast

Design a key-value store with getLast Design and implement an in-memory key–value store with this API: add(key, value), get(key), remove(key), and get...

Coding & AlgorithmsData Structure DesignLinked Lists
12
0
94 people solved
Jul 15, 2025
Upstart logo
Upstart
Hard
Data Scientist

Evaluate channels and allocate budget

Marketing Analytics Case: Funnel, Attribution, Budget Optimization, and Incrementality You are given a daily-by-channel dataset with the following col...

Analytics & ExperimentationUser Behavior & FunnelsGrowth & Monetization
14
0
105 people solved
Oct 13, 2025
Zillow logo
Zillow
Medium
Machine Learning Engineer

Describe a recent project and your biggest challenge

Behavioral questions You have 5–10 minutes to answer, using a structured approach (e.g., STAR). 1. Self-introduction: Give a concise overview of your ...

Behavioral & Leadership
3
0
51 people solved
Nov 8, 2025
HBO logo
HBO
Hard
Data Scientist

Explain streaming move and industry tradeoffs

HBO Max Data Scientist — Take‑Home Prompts Context You are applying for a Data Scientist role focused on consumer streaming. Answer the following conc...

Behavioral & Leadership
4
0
44 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Write SQL to quantify outage revenue loss

A database outage blocked premium membership registrations from 2025-01-01 to 2025-03-31 (inclusive). Members intend to start on intended_start_date, ...

Data Manipulation (SQL/Python)
1
0
18 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Data Scientist

Balance Customer Satisfaction with Fraud Prevention: Key Metrics to Track

Balancing Customer Satisfaction and Fraud Prevention In a consumer app with payments, Product wants minimal friction for legitimate users while Risk w...

Analytics & Experimentation
27
0
98 people solved
Jul 12, 2025
Uber logo
Uber
Hard
Software Engineer Locked

Solve two online assessment problems

This two-part prompt evaluates algorithmic problem-solving skills: the first problem tests optimization under index-based movement and number-theoreti...

Coding & AlgorithmsDynamic ProgrammingTrees
12
0
130 people solved
Mar 19, 2026
Disney logo
Disney
Medium
Software Engineer Locked

Implement an LRU cache

This question evaluates understanding of data structures and algorithmic optimization for constant-time cache operations, with emphasis on cache evict...

Coding & AlgorithmsData Structure DesignLinked Lists
7
0
81 people solved
Jan 22, 2026
TikTok logo
TikTok
Medium
Data Scientist

Optimize threshold using confusion matrix and costs

Calibrated Classifier on an Imbalanced Dataset (1% positives) You have a perfectly calibrated binary classifier evaluated on 10,000 held-out examples....

Statistics & Math
8
0
77 people solved
Oct 13, 2025
Apple logo
Apple
Hard
Software Engineer

Migrate a monolithic wallet to microservices

System Design: Migrating a Monolithic Digital Wallet (Apple Cash–like) to Microservices Context You operate a high-scale consumer digital wallet and p...

System DesignPayments & LedgersDistributed Transactions & Idempotency
7
0
101 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Solve 4 LeetCode algorithm problems

Question LeetCode 636. Exclusive Time of Functions LeetCode 253. Meeting Rooms II LeetCode 314. Binary Tree Vertical Order Traversal LeetCode 215. Kth...

Coding & Algorithms
3
0
28 people solved
Jul 29, 2025
Meta logo
Meta
Medium
Data Scientist

Investigate Causes of Decline in Facebook Group Comments

Investigate Causes of Decline in Facebook Group Comments Scenario A sharp decline in Comments per Post (CPP) was observed in Facebook Groups last week...

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

Explain Transformer, GPT vs BERT, and PR metrics

Answer the following conceptual questions: 1. Transformer architecture - Describe the main components of a Transformer block and what each part doe...

Software Engineering FundamentalsTransformers & AttentionModel Evaluation
6
0
74 people solved
Dec 15, 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
89 people solved
Jul 31, 2025
Spokeo logo
Spokeo
Medium
Data Scientist

Explain Key Terms in Model Evaluation for Fraud Detection

Explain Key Terms in Model Evaluation for Fraud Detection Model Evaluation Terminology and Business Trade-offs Scenario Phone screen focused on unders...

Machine Learning
4
0
51 people solved
Aug 4, 2025
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