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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
TikTok logo
TikTok
Medium
Data Scientist

Write SQL for last-7-day metrics without windows

Assume today is 2025-09-01. Use ANSI SQL only and do not use window functions. You may use subqueries, GROUP BY, HAVING, and JOINs. Schema and small s...

Data Manipulation (SQL/Python)
2
0
27 people solved
Oct 13, 2025
ByteDance logo
ByteDance
Easy
Software Engineer

Describe Over-Engineering and UX Wins

After a project deep dive, the interviewer asked two behavioral questions: 1. Describe a time when you designed or implemented something that became m...

Behavioral & Leadership
4
0
75 people solved
Feb 1, 2026
TikTok logo
TikTok
Hard
Software Engineer

Explain Kafka architecture and reliability semantics

Explain Kafka architecture and reliability semantics Kafka Architecture and End-to-End Semantics You are asked to explain Kafka's core architecture an...

System Design
6
0
70 people solved
Jul 15, 2025
LinkedIn logo
LinkedIn
Medium
Data Scientist

Identify Sales Professionals

Classifying Sales Professionals on LinkedIn You are building a machine-learning system that automatically classifies LinkedIn members who are likely t...

Analytics & Experimentation
20
0
77 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Build DiD dataset with SQL

Using the schema and sample data below, write SQL to build an individual-day panel suitable for staggered-adoption DiD of the shuttle’s effect on part...

Data Manipulation (SQL/Python)SQL
6
0
80 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Deep-Clone a Hand-Built Doubly Linked List with an Arbitrary Special Pointer

Implement a doubly linked list in which every node has four fields: - value: the node's value (assume an integer); - left: the previous node, or null ...

Software Engineering FundamentalsLinked Lists
0
0
1 people solved
Aug 4, 2026
Microsoft logo
Microsoft
Easy
Data ScientistSenior+ Locked

Write an average-income function

This question evaluates proficiency in data manipulation and basic statistical aggregation, particularly handling missing values and computing average...

Coding & AlgorithmsPandas & Python Data
15
0
125 people solved
Apr 1, 2026
Apple logo
Apple
Medium
Data Scientist

Differentiate P-value and Confidence Interval in Statistics

Differentiate P-value and Confidence Interval in Statistics Statistics Knowledge Check (Onsite Data Scientist) Task Explain core inferential statistic...

Statistics & MathHypothesis Testing
10
0
118 people solved
Aug 4, 2025
Capital One logo
Capital One
Hard
Data Scientist

Design and analyze a card signup A/B test

A/B Test Design: Co‑Branded Gym Credit Card Offer Context: You will A/B test a 3‑month free gym membership offer shown on the application landing page...

Analytics & ExperimentationExperiment Design (A/B Testing)Business Case Analysis
11
0
101 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Detect words formed by multiple dictionary parts

Given an array words of up to 100,000 non-empty lowercase strings (total characters ≤ 1,000, 000), return all strings that can be formed by concatenat...

Coding & Algorithms
4
0
67 people solved
Sep 6, 2025
Google logo
Google
Hard
Software Engineer

Answer collaboration, ambiguity, growth, and failure questions

Behavioral Interview Prompts Answer the following prompts using a structured format (e.g., STAR: Situation, Task, Action, Result). Assume the intervie...

Behavioral & Leadership
10
0
77 people solved
Jan 7, 2026
Shopify logo
Shopify
Medium
Machine Learning Engineer

Describe ML projects and tech choices

ML Project Overview and Deep Dive (HR Screen) Context You are interviewing for a Machine Learning Engineer role. Provide a concise, structured overvie...

ML System DesignProject Deep DiveModel Evaluation
15
0
138 people solved
Sep 6, 2025
Intuit logo
Intuit
Medium
Software Engineer Locked

Format VARCHAR amounts into $ with M/B suffix

This question evaluates a candidate's ability to perform SQL data manipulation tasks such as string-to-number conversion, conditional scaling and suff...

Software Engineering FundamentalsSQL
10
0
74 people solved
Feb 11, 2026
Amazon logo
Amazon
Medium
Software Engineer

Find LCA in a BST

Find LCA in a BST Given the root of a binary search tree and two keys p and q, return the value of their lowest common ancestor (the deepest node whos...

Coding & Algorithms
4
0
55 people solved
Aug 10, 2025
Bloomberg logo
Bloomberg
Medium
Data Engineer

Write Postgres string parsing and aggregation query

You are given a PostgreSQL table events(user_id TEXT, raw TEXT) where raw stores pipe-delimited key=value pairs, for example 'user=U1|country=US|ts=20...

Data Manipulation (SQL/Python)
2
0
23 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Calculate Late Delivery Percentage and Top Customers

Orders +-----------+-------------+------------------------+------------------------+ | order_id | customer_id | expected_delivery_date | actual_deliv...

Data Manipulation (SQL/Python)
5
0
50 people solved
Aug 4, 2025
Intuit logo
Intuit
Hard
Data Scientist

Diagnose rising delivery cost precisely

Problem: Delivery Cost per Order Increased — Design an Analysis Plan Context A restaurant reports a significant increase in delivery cost per order in...

Analytics & Experimentation
9
0
69 people solved
Oct 13, 2025
Circle logo
Circle
Medium
Software Engineer

Trace and reduce redundant curl requests

Instrument and Optimize a Client's HTTP Requests for a Workflow You are pair-programming with the interviewer. You have a client (a script or applicat...

System DesignAPI Integration & HTTP ClientsCaching
15
0
157 people solved
Jul 17, 2025
Amazon logo
Amazon
Medium
Data Scientist

Optimize Feature Selection and Handling in Machine Learning Models

Optimize Feature Selection and Handling in Machine Learning Models You are building a customer propensity model to predict whether a user will purchas...

Machine Learning
21
0
148 people solved
Jul 12, 2025
DoorDash logo
DoorDash
Hard
Data Scientist

Design an experiment for order batching

Experiment Design: Two-Order Batching Policy During Peak Hours Context DoorDash plans to test a dispatch policy that allows a dasher to pick up two ne...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
15
0
206 people solved
Oct 13, 2025
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