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

"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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Medium

Software Engineer

How to Identify Best Battery Group

You have historical quality data for batteries that were randomly assigned to one of 5 groups. Each battery then goes through 3 different quality test...

Machine LearningHypothesis Testing

Data Scientist Locked

Analyze spend and creation-source shifts

This question evaluates a data scientist's competency in SQL-based data manipulation, time-series aggregation, joins, and metric computation for analy...

Data Manipulation (SQL/Python)SQLMetrics & KPIs

Compute negative-price probability after n steps

Random-Walk Price Crossing Probability Setup - Initial price: S₀ = s (real number). - Step size: x > 0. - Number of days: n (integer ≥ 0). - Each day ...

Statistics & MathProbability

Compute Averages of Unique Numbers in Dictionary Lists

Scenario Python tech screen: given a dictionary mapping keys to numeric lists, e.g., {'a':[1,2,1],'b':[1,2,3]}, compute the average of each list after...

Machine Learning Engineer

Explain CLIP, contrastive losses, and retrieval limits

Answer the following ML questions in the context of multi-modal (text–video/image) retrieval: 1) How does a CLIP-style model work conceptually (archit...

Machine LearningEmbeddings & Vector SearchNeural Networks & Training

Describe handling deadlines, conflicts, feedback, and ownership

Behavioral Interview Prompts — Software Engineer (Onsite) Context: You will be asked to share specific, first-person examples using a structured forma...

Behavioral & Leadership

Parse API JSON and print org chart

You will solve two practical coding tasks. Task 1: Call an HTTP API and parse JSON You are given an HTTP endpoint that returns JSON describing transit...

Coding & AlgorithmsAPI Integration & HTTP ClientsTrees

Compute percent of active users with 50+ calls

Problem You work on a Messenger-like app. You want to measure how many active users in Great Britain (GB) today have been heavy callers recently. Tabl...

Data Manipulation (SQL/Python)SQL

Compute weekly 3-week rolling sums in SQL

Using PostgreSQL, write a single query that outputs, for each calendar week in a given range, the sum of amounts in that week and a rolling sum over t...

Data Manipulation (SQL/Python)

Add a click listener to a button

Add a click listener to a button JavaScript: Add a Click Listener to Log Button Text Context Assume your page contains a button element like: <button ...

Software Engineering FundamentalsJavaScript & TypeScript

Implement expression expansion to plus-only form

Given a string expression consisting only of lowercase letters (variables), '+', '*', '(', and ')', return an equivalent expression that uses only '+'...

Design bot detection and evaluate trade-offs

Bot-Detection System Design for Comment Activity Context You are designing and evaluating a machine learning system to detect automated (bot) comment ...

Design and power an A/B on question mix

Experiment Design: Replacing 10% "Other" Verbal With Grammar in a 15-Min, 19-Question Section You need to test whether replacing the 10% "other" verba...

Analytics & Experimentation

Track Success and Guardrail Metrics for Push Notifications

Track Success and Guardrail Metrics for Push Notifications You are designing and evaluating a new push-notification feature for a travel-recommendatio...

Analytics & Experimentation

Determine Weekly Break-Even Point for Diaper Service

Diaper Service Unit Economics and Inventory Flow A weekly subscription diaper-delivery and cleaning service operates with these parameters: - Customer...

Analytics & Experimentation

Determine Top Advertisers by Conversion Rate and CTR Analysis

ads +-------+---------------+------------+ | ad_id | advertiser_id | created_at | +-------+---------------+------------+ | 1 | 101 | 202...

Data Manipulation (SQL/Python)

Lead structured response to accuracy incident

Incident Response Plan: Spike in Incorrect Payments for CA Users Aged 18–24 Scenario Since 00:00 today, the share of incorrect payments for users aged...

Behavioral & LeadershipMetric DiagnosticsModel Monitoring & Drift

Compute and plot a precision–recall curve

Precision–Recall (PR) curve coding / evaluation You are given a binary classifier’s outputs on a dataset: - y_true: array of true labels in \(\{0,1\}\...

Machine LearningModel EvaluationML Coding

Software Engineer Locked

Design a natural-disaster notification system

This question evaluates system design competencies including large-scale geospatial data processing, spatial indexing, event-driven notification pipel...

System DesignGeo & Delivery SystemsAPI Design

Software EngineerSenior+

Explain HashMap Resizing Without Long Pauses

Explain how a hash map works internally. Cover how keys are mapped to buckets, how collisions are handled, and when the table decides to resize. Follo...

Software Engineering Fundamentals

64 people solved

Oct 28, 2025

Tech Interview Questions

How to Identify Best Battery Group

Analyze spend and creation-source shifts

Compute negative-price probability after n steps

Compute Averages of Unique Numbers in Dictionary Lists

Explain CLIP, contrastive losses, and retrieval limits

Describe handling deadlines, conflicts, feedback, and ownership

Parse API JSON and print org chart

Compute percent of active users with 50+ calls

Compute weekly 3-week rolling sums in SQL

Add a click listener to a button

Implement expression expansion to plus-only form

Design bot detection and evaluate trade-offs

Design and power an A/B on question mix

Track Success and Guardrail Metrics for Push Notifications

Determine Weekly Break-Even Point for Diaper Service

Determine Top Advertisers by Conversion Rate and CTR Analysis

Lead structured response to accuracy incident

Compute and plot a precision–recall curve

Design a natural-disaster notification system

Explain HashMap Resizing Without Long Pauses

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