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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
Nuro logo
Nuro
Easy
Software Engineer Locked

Parse logs and count error codes

This question evaluates parsing and sanitizing structured text, extracting specific fields, and performing frequency aggregation of identifiers such a...

Coding & AlgorithmsParsing & Interpreters
6
0
102 people solved
Feb 12, 2026
Medium
Data Scientist

Evaluate and select K in K-means

K-means Clustering: Concepts, Initialization, Model Selection, Preprocessing, and Business Validation Context: You are clustering customer data with n...

Machine Learning
3
0
63 people solved
Oct 13, 2025
Zillow logo
Zillow
Medium
Machine Learning Engineer

Find max min-plus-max over all subarrays

Find max min-plus-max over all subarrays You are given an array arr of n integers. A subarray is a contiguous non-empty segment of the array. For any ...

Coding & Algorithms
7
0
55 people solved
Jul 18, 2025
Meta logo
Meta
Hard
Data Scientist

Evaluate the Health of Facebook Groups

Group Health Metrics and Threaded Comments Experiment You are a Data Scientist working on a platform with Groups ranging from small hobby clubs to ver...

Analytics & Experimentation
55
0
75 people solved
Jul 12, 2025
CloudTrucks logo
CloudTrucks
Medium
Data Scientist

Assess Cultural Fit and Motivation for Joining CloudTrucks

Assess Cultural Fit and Motivation for Joining CloudTrucks Behavioral Interview — Data Scientist Phone Screen (CloudTrucks) Scenario A recruiter is as...

Behavioral & Leadership
3
0
32 people solved
Aug 4, 2025
TikTok logo
TikTok
Medium
Data Scientist

Implement streaming SRM detector with late events

Implement a streaming detector for sample ratio mismatch (SRM) across many concurrent experiments. Input is two topic-partitioned streams: assignments...

Coding & AlgorithmsHypothesis TestingBatch & Stream Processing
4
0
94 people solved
Oct 13, 2025
Supio logo
Supio
Easy
Software Engineer

Compute max planes shot and session count

Problem 1: Max planes you can shoot before any lands You are given two equal-length arrays: - altitude[i]: the initial altitude of plane i (positive i...

Coding & Algorithms
3
0
56 people solved
Feb 12, 2026
PayPal logo
PayPal
Medium
Data Scientist

Analyze Success Metrics and Diagnose Crypto Feature Issues

Analyze Success Metrics and Diagnose Crypto Feature Issues Post-Launch Evaluation: Crypto Trading Feature Context You are a Data Scientist evaluating ...

Analytics & Experimentation
7
0
68 people solved
Aug 4, 2025
Lyft logo
Lyft
Medium
Software Engineer

Print the K-th non-empty line

Given a large UTF-8 text file, write a program that prints the K-th non-empty line. Do not load the whole file into memory. Specify how you handle fil...

Data Manipulation (SQL/Python)Operating SystemsProgramming Languages
17
0
147 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Solve String Addition and Expression Evaluation

This question evaluates string manipulation and parsing skills for numeric computation, covering addition of integers represented as character arrays ...

Coding & Algorithms
7
0
53 people solved
Apr 16, 2026
Coinbase logo
Coinbase
Medium
Data Scientist

Estimate Successful Sign-ups from Super Bowl QR Code Ad

Estimate Successful Sign-ups from a Super Bowl QR Code Ad A cryptocurrency company airs a national Super Bowl commercial featuring a bouncing QR code....

Analytics & Experimentation
24
0
71 people solved
Jul 12, 2025
Google logo
Google
Medium
Software Engineer Locked

Choose optimal guesses for green-only Wordle

This question evaluates probabilistic reasoning, expected-value optimization, information partitioning, and algorithmic efficiency in selecting guesse...

Coding & AlgorithmsMath & Number TheoryProbability
13
1
155 people solved
Oct 14, 2025
Meta logo
Meta
Medium
Software Engineer

Find top-K frequent elements in a stream

You receive a large stream of items (e.g., integers or strings) that may not fit in memory. Design an algorithm that can return the top K most frequen...

Coding & AlgorithmsBatch & Stream Processing
9
0
86 people solved
Feb 25, 2026
Cadence logo
Cadence
Medium
Machine Learning EngineerNew Grad Locked

Explain Transformer Positional Encoding

This question evaluates understanding of positional encoding in Transformer architectures, including how positional information is integrated into tok...

Machine Learning
5
0
36 people solved
Jan 5, 2026
Dropbox logo
Dropbox
Medium
Data Scientist

Run org-safe online experiment for recommender

Propose an online experimentation plan to evaluate the file recommender in production across multiple organizations where collaborators can influence ...

Analytics & Experimentation
9
0
68 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software Engineer

Copy linked list with random pointers efficiently

Copy linked list with random pointers efficiently Given the head of a singly linked list where each node has next and random pointers, create a deep c...

Coding & Algorithms
4
0
69 people solved
Jul 15, 2025
Amazon logo
Amazon
Medium
Software Engineer

Implement tree left/right views via BFS and DFS

Given a binary tree, output the left view and right view: for each depth, the first node visible from the left and the first node visible from the rig...

Coding & Algorithms
3
0
57 people solved
Aug 13, 2025
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist Locked

Build a leak-free sklearn pipeline

This question evaluates a candidate's ability to construct a leak-free scikit-learn pipeline encompassing column-wise preprocessing, imbalanced binary...

Machine Learning
10
0
90 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Calculate break-even new customers for a 30% Rent-a-Home discount

Question Capital One (C1) is evaluating a promotional offer on its Rent-a-Home (RH) product and wants you to size the unit economics. Base assumptions...

Statistics & Math
11
0
82 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Analyze Order Spending Patterns Across Cities Using SQL

Orders order_id | user_id | order_date | city | order_value 1 | 101 | 2023-01-03 | LA | 23.50 2 | 102 | 2023-01-04 | NY | 45.00 3 | 101 | 2023-01-10 |...

Data Manipulation (SQL/Python)
6
0
41 people solved
Aug 4, 2025
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