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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
NVIDIA logo
NVIDIA
Hard
Machine Learning Engineer

Discuss Transformer LLM Design

Discuss Transformer LLM Design System-Design-Oriented LLM Question Context: You are designing, fine-tuning, and operating a Transformer-based large la...

ML System DesignTransformers & AttentionFine-Tuning & Alignment Techniques
45
0
205 people solved
Jul 29, 2025
Netapp logo
Netapp
Medium
Software Engineer Locked

Design a Production Retrieval-Augmented Generation Pipeline

Design a production retrieval-augmented generation pipeline over cloud-hosted documents, covering ingestion, vector retrieval, grounded model orchestr...

ML System Design
0
0
11 people solved
Aug 9, 2026
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Find Maximum Rectangle in Bar Chart

Given an array heights of n non-negative integers, where each value represents the height of a vertical bar in a bar chart and every bar has width 1, ...

Coding & Algorithms
4
0
46 people solved
Feb 20, 2026
Microsoft logo
Microsoft
Easy
Data ScientistNew Grad

Explain KNN and PCA and key tradeoffs

In a Data Scientist internship interview, you are asked ML fundamentals: 1) K-Nearest Neighbors (KNN) - Explain how KNN works for classification and r...

Machine Learning
6
0
92 people solved
Nov 24, 2025
ByteDance logo
ByteDance
Hard
Software Engineer

Assign Meetings and Find the Most-Used Room

Assign Meetings and Find the Most-Used Room There are n rooms numbered from 0 through n - 1 and meetings [start, end] with distinct start times. Proce...

Coding & Algorithms
1
0
27 people solved
Apr 28, 2026
Netflix logo
Netflix
Hard
Software EngineerSenior+

Compute Earliest Completion Times

You are given n tasks numbered from 0 to n - 1. Each task i has a positive duration duration[i]. You are also given a list of prerequisite relationshi...

Coding & Algorithms
6
0
52 people solved
Apr 5, 2026
Jump Trading logo
Jump Trading
Medium
Software Engineer

Explain C++ vector, unordered_map, and virtual functions

Explain C++ vector, unordered_map, and virtual functions In C++, explain: - The amortized and worst-case time complexity of vector::push_back, and how...

Coding & AlgorithmsProgramming Languages
35
0
256 people solved
Jul 16, 2025
Google logo
Google
Hard
Machine Learning Engineer

Design a reaction-factor prediction system

End-to-End System Design: Predicting a Reaction Factor from Molecule Pairs Context and goal - You have a tabular dataset with columns: - molecule1_n...

ML System Design
11
0
136 people solved
Sep 6, 2025
Uber logo
Uber
Hard
Software Engineer

Design Uber Eats-style search function

Design the search function for a large-scale food delivery platform similar to Uber Eats. A user opens the app and types a query into a single search ...

System DesignSearch & Feed SystemsGeo & Delivery Systems
49
0
587 people solved
Nov 11, 2025
Earnin logo
Earnin
Medium
Data AnalystSenior+

Defend the Decisions Behind a High-Impact Data Project

A reported senior-level hiring-manager screen spent substantial time on past projects and follow-up questions, although the exact wording was not pres...

Behavioral & Leadership
3
0
26 people solved
Apr 20, 2026
Tubi logo
Tubi
Medium
Machine Learning Engineer

Weighted Random Sampling by Index

Weighted Random Sampling by Index You are given an array of positive integer weights weights, where weights[i] is the weight assigned to index i. Impl...

Coding & Algorithms
4
0
33 people solved
Feb 10, 2026
Anchorage Digital logo
Anchorage Digital
Medium
Software Engineer Locked

Print the File System State

This question evaluates a candidate's ability to serialize and format in-memory data structures for deterministic textual output, focusing on represen...

Coding & Algorithms
1
0
17 people solved
Jun 9, 2026
Instacart logo
Instacart
Hard
Data Scientist Locked

Design and Interpret an A/B Test

This question evaluates a data scientist's competency in experimental design and applied statistics, encompassing power and sample-size calculations, ...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
27
0
215 people solved
May 3, 2026
Google logo
Google
Medium
Software Engineer

Walk resume and tackle hypotheticals

Resume Deep‑Dive and Leadership Hypotheticals (Software Engineer Onsite) Context You are asked to walk through two impactful projects from your resume...

Behavioral & Leadership
13
0
114 people solved
Sep 6, 2025
Stripe logo
Stripe
Easy
Data Engineer Locked

Compute shipping cost with tiered pricing

This question evaluates the ability to implement tiered billing and aggregate shipping costs across order line items, testing competencies in algorith...

Coding & AlgorithmsArrays & StringsMath & Number Theory
9
0
98 people solved
Jan 17, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Write SQL for multi-account metrics

This question evaluates proficiency in SQL for multi-table aggregation, grouping, joins, and conditional counting within a user-account-notification s...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
8
1
64 people solved
Mar 16, 2026
Boston Consulting Group logo
Boston Consulting Group
Easy
Software Engineer

Answer common behavioral questions using STAR

Behavioral questions Answer the following behavioral interview questions. Use specific examples from your past experience and structure your responses...

Behavioral & Leadership
9
0
81 people solved
Dec 15, 2025
ZipHQ logo
ZipHQ
Medium
Software Engineer

Find flush and straight groups in cards

You are given an array of strings cards, where each string represents a distinct playing card. Each card string has the format <rank><suit>: - rank is...

Coding & AlgorithmsArrays & Strings
52
0
371 people solved
Nov 28, 2025
Two Sigma logo
Two Sigma
Medium
Data Scientist

Analyze NYC taxi trips efficiently over last 7 days

Use today = 2025-09-01. Consider NYC taxi trip data over the last 7 days inclusive (2025-08-26 to 2025-09-01, America/New_York). You receive two datas...

Data Manipulation (SQL/Python)
2
0
48 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Machine Learning Engineer

Compute nested depth sum and grid distance

Problem A: Weighted sum of integers in a nested list You are given a nested list structure that may contain integers or other nested lists. Define the...

Coding & Algorithms
13
0
91 people solved
Dec 15, 2025
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