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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
Tesla logo
Tesla
Medium
Software Engineer

Verify permutation in-place and implement fast power

1) Given an integer list A of length n, determine whether A is a permutation of [0, 1, ..., n-1]. Do it in-place with O( 1) extra space (no auxiliary ...

Coding & AlgorithmsArrays & StringsMath & Number Theory
8
0
100 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Validate near-palindrome and course prerequisite feasibility

Coding round (40 minutes): two problems You do not need to run code, but you should: - Explain your approach clearly. - Walk through the logic on exam...

Coding & Algorithms
3
0
41 people solved
Dec 15, 2025
Google logo
Google
Hard
Software Engineer

Answer core teamwork and conflict stories

You are in a behavioral interview. Prepare to answer the following prompts using concrete examples from your experience. Prompts 1. Describe a challen...

Behavioral & LeadershipConflict & Collaboration
22
0
189 people solved
Jan 22, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design Catalog Update Pipeline

This question evaluates a candidate's ability to design scalable, fault-tolerant catalog update pipelines, including partitioning for horizontal scala...

System DesignMessaging & Event-DrivenPartitioning & Consistent Hashing
26
0
438 people solved
Feb 1, 2026
Amazon logo
Amazon
Medium
Software Engineer

Respond to negative feedback and exceed requirements

Respond to negative feedback and exceed requirements Behavioral Question: Negative Feedback and Going Beyond Requirements Context: Software Engineer —...

Behavioral & Leadership
9
0
61 people solved
Jul 31, 2025
Yelp logo
Yelp
Medium
Data Scientist

Modify Instagram Feature: Track User Engagement Metric

Modify Instagram Feature: Track User Engagement Metric A/B Test Design for Modifying a Disliked Social Feature Scenario A social-media company plans t...

Analytics & Experimentation
92
0
171 people solved
Aug 4, 2025
PayPal logo
PayPal
Medium
Data Scientist

Master A/B Testing: Key Concepts and Methodologies Explained

A/B Testing and Causal Inference: Core Concepts You are a data scientist interviewing for a role working on an online product. Demonstrate practical A...

Analytics & Experimentation
81
0
187 people solved
Jul 12, 2025
Microsoft logo
Microsoft
Medium
Software EngineerNew Grad Locked

Build a CSV Query Engine

This question evaluates proficiency in text parsing, data modeling, and implementing in-memory query semantics, including CSV parsing rules, type infe...

Coding & Algorithms
9
0
69 people solved
Jan 31, 2026
Capital One logo
Capital One
Medium
Data Scientist

Describe your proudest accomplishment and impact

What is the most meaningful accomplishment in your recent role? Detail: a) the baseline and measurable target; b) constraints and risks; c) your uniqu...

Behavioral & Leadership
2
0
47 people solved
Oct 13, 2025
Airtable logo
Airtable
Medium
Software Engineer Locked

Count business days excluding holidays

This question evaluates proficiency in date and calendar arithmetic, handling set-based exclusions (holiday lists), and reasoning about algorithmic ef...

Coding & AlgorithmsMath & Number Theory
30
0
347 people solved
Jan 22, 2026
Jerry.Ai logo
Jerry.Ai
Medium
Software Engineer

Determine a one-step string transformation

Given two lowercase strings source and target, determine whether target can be obtained from source using at most one of the following operations, and...

Coding & Algorithms
1
0
31 people solved
Jan 1, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Count users over n connections

Count users over n connections Given a stream of relationship events in the form [[user_a, user_b, op], ...], where op ∈ {"connect", "disconnect"}, tr...

Coding & Algorithms
10
0
78 people solved
Aug 7, 2025
Google logo
Google
Medium
Software Engineer

Troubleshoot CPU, latency, and DNS issues

A) A Linux server’s CPU usage suddenly spikes. What immediate checks and commands would you run (e.g., top/htop, pidstat, perf, iostat), how would you...

Coding & AlgorithmsDebuggingNetworking
9
0
165 people solved
Sep 6, 2025
Capital One logo
Capital One
Hard
Machine Learning Engineer Locked

Compute minutes since last train departure

This question evaluates time arithmetic and handling of cyclic day-wrap boundary conditions along with parsing and comparison of timestamp lists, refl...

Coding & Algorithms
9
0
59 people solved
Jan 6, 2026
Newrelic logo
Newrelic
Hard
Software Engineer Locked

Product of Array Except Self Without Division

Compute the product of every array element except the current one without division. Achieve linear time and constant auxiliary space beyond the output...

Coding & Algorithms
1
0
19 people solved
Jul 10, 2026
Uber logo
Uber
Medium
Data Scientist

Compare Two Coin Proportions

You are given results from two independent coin-toss experiments: - Coin A was tossed 100 times and landed heads 40 times. - Coin B was tossed 1,000 t...

Statistics & MathHypothesis TestingSampling & Estimation
16
0
142 people solved
Mar 28, 2026
Instacart logo
Instacart
Easy
Data Scientist

Design a pricing experiment with network effects

Scenario You want to launch a new pricing model that incentivizes shoppers to place/pick up more orders during rush hours in a two-sided marketplace (...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
29
0
215 people solved
Feb 6, 2026
xAI logo
xAI
Medium
Software Engineer

How Would You Prevent Hallucinations in an LLM-Based System?

You are interviewing for an AI-focused Software Engineer role at a company building products on top of large language models. During the screen, the i...

Machine Learning
5
0
93 people solved
Nov 21, 2025
eBay logo
eBay
Medium
Software Engineer

Pass functions and analyze basic data structures

Implement a function applyTwice(f, x) that accepts a function f and a value x and returns f(f(x)) in your preferred language. Demonstrate how to pass ...

Coding & Algorithms
1
0
37 people solved
Sep 6, 2025
Chicago Trading Company logo
Chicago Trading Company
Easy
Data Scientist Locked

Determine if tree has path sum

This question evaluates understanding of binary tree data structures and traversal techniques, along with the ability to accumulate and track root-to-...

Coding & Algorithms
4
0
36 people solved
Feb 9, 2026
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