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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
Asana logo
Asana
Medium
Software Engineer Locked

Design a Real-Time Like Counter for Collaborative Tasks

Design a real-time like counter for collaborative tasks with one active like per signed-in user. Cover idempotent mutations, authoritative counts, SSE...

System DesignReal-Time SystemsDistributed Transactions & Idempotency
15
0
304 people solved
Jul 16, 2026
Stripe logo
Stripe
Medium
Data Scientist

Design an idempotent SQL ETL for late data

You own the daily_user_metrics fact table. Build an idempotent, rerunnable ETL that can be triggered for any date D and correctly handles duplicates, ...

Data Manipulation (SQL/Python)
9
0
66 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Product Manager

Meta PM Interview Questions

Product and Decision-Making Onsite Case Prompt Set You are a Product Manager candidate preparing for a mixed onsite loop covering strategy, data, desi...

Product / Decision MakingProduct SenseFailure & Learning
114
0
953 people solved
Jul 4, 2025
Home Depot logo
Home Depot
Medium
Data Analyst

Debug row loss after SQL joins

You are reviewing a buggy SQL query used by a retail analytics team at a home-improvement company. The query is supposed to return daily promo sales f...

Data Manipulation (SQL/Python)SQLDebugging
12
1
161 people solved
Dec 15, 2025
Uber logo
Uber
Medium
Machine Learning Engineer

Find First Local Minimum

Given an integer array nums, find the index of the first local minimum. A local minimum is an element that is smaller than its immediate neighbors: - ...

Coding & Algorithms
7
0
56 people solved
Apr 17, 2026
CVS Health logo
CVS Health
Easy
Data Scientist

Compute specialty spend share and top age band

You are given healthcare claims data split across member tables. Tables Assume the following schemas (types may be adapted to your SQL dialect): mem1 ...

Data Manipulation (SQL/Python)SQLPandas & Python Data
15
1
132 people solved
Oct 17, 2025
Google logo
Google
Medium
Data ScientistSenior+

Simulate Uniform(0,1) from random bits

Assume you have access to a function rand_bit() that returns 0 or 1 with equal probability and independent across calls. How would you generate a rand...

Coding & Algorithms
7
0
115 people solved
Nov 24, 2025
NVIDIA logo
NVIDIA
Medium
Data EngineerSenior+

Merge Overlapping Time Intervals

You are given a list of closed time intervals. Each interval is represented as [start, end], where start <= end. Write a function that returns the sma...

Coding & Algorithms
2
0
29 people solved
May 3, 2026
OpenAI logo
OpenAI
Easy
Data Scientist

Compute signup rate and retention from raw logs

Scenario You are analyzing an A/B test for a marketing campaign offering a free 1-month trial. You are given raw “upstream” tables that resemble produ...

Data Manipulation (SQL/Python)Experiment Design (A/B Testing)Metrics & KPIs
11
0
97 people solved
Oct 4, 2025
Uber logo
Uber
Medium
Machine Learning Engineer

Where to apply ML in a task flow from customer request to driver-uploaded evidence

This was a short, free-form design discussion at the end of a phone screen. The interviewer described a platform on which customers submit tasks that ...

ML System DesignLLM ApplicationsModel Evaluation
0
0
6 people solved
Aug 5, 2026
OpenAI logo
OpenAI
Medium
Product Manager

Describe relevant PM experience

You are interviewing for a Product Manager role at OpenAI. Prepare outcome-oriented behavioral answers for these prompts: 1. Tell me about your experi...

Behavioral & LeadershipMetrics & KPIsExperiment Design (A/B Testing)
20
0
201 people solved
Mar 29, 2025
Rogo logo
Rogo
Medium
Machine Learning Engineer Locked

Manage Context Windows in an Applied AI System

An applied-AI system-design interview about building model context from user requests, conversation history, retrieved evidence, and tool results. It ...

ML System Design
4
0
34 people solved
Jun 24, 2026
Airbnb logo
Airbnb
Medium
Software Engineer Locked

Find smallest permutation under constraints

This question evaluates digit-manipulation and combinatorial permutation skills, along with numeric ordering and representation concerns such as leadi...

Coding & AlgorithmsBacktracking & Recursion
42
2
394 people solved
Feb 12, 2026
Apple logo
Apple
Medium
Software Engineer

Zero out duplicates and sort an array

Coding question You are given an integer array arr of length about 75. - The data is not sorted. - The array may contain duplicate values. - You must ...

Coding & AlgorithmsSorting
26
0
231 people solved
Feb 12, 2026
ByteDance logo
ByteDance
Medium
Data Scientist Locked

Find Each User's Earliest Seven-Day Activity Streak

A PostgreSQL interview problem about finding each user's earliest streak of at least seven consecutive active dates. It tests date deduplication, gaps...

Data Manipulation (SQL/Python)SQL
16
0
141 people solved
Aug 3, 2026
Oracle logo
Oracle
Medium
Software Engineer

Find Each Island's Maximum Height

Find Each Island's Maximum Height A rectangular grid uses 0 for water and a positive integer for each land cell's height. Land cells connect only thro...

Coding & Algorithms
2
0
20 people solved
Aug 18, 2026
Sigmacomputing logo
Sigmacomputing
Medium
Software Engineer

Build a Pivot Table Aggregator

Implement a function that builds a pivot table from a list of records. Each record contains a row_key, a column_key, and a numeric value. Requirements...

Coding & Algorithms
8
0
68 people solved
Apr 9, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Solve Four Interview Coding Problems

This question set evaluates algorithmic problem-solving skills including graph traversal and itinerary reconstruction, time-sorted search and binary s...

Coding & AlgorithmsGraphsBinary Search
20
0
152 people solved
Feb 1, 2026
Pinterest logo
Pinterest
Easy
Machine Learning Engineer

Implement string-based rounding without floats

Coding You are not allowed to parse the input into a built-in floating type (to avoid overflow and precision issues). Work directly on strings. 1) Imp...

Coding & AlgorithmsArrays & StringsMath & Number Theory
20
0
185 people solved
Dec 15, 2025
Optiver logo
Optiver
Medium
Software Engineer

Build and Validate a Binary Tree from Parent-Child Pairs

Build and Validate a Binary Tree from Parent-Child Pairs You are given a single input string that is supposed to describe a binary tree as a sequence ...

Coding & Algorithms
9
0
97 people solved
Apr 21, 2026
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