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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."

Blind 75Free
Showing 20 results
Graham Capital logo
Graham Capital
Hard
Software Engineer

Model and measure trading transaction costs

Modeling and Incorporating Transaction Costs in an Event-Driven Trading Strategy Context You are designing an event-driven trading strategy that react...

Analytics & Experimentation
3
0
54 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software Engineer

Compute reachability and minimal-time same-type scheduling

1) Given four integers a, b, c, d (1 <= a, b, c, d <= 1000), you may perform the following operations any number of times and in any order: (a, b) -> ...

Coding & Algorithms
6
0
48 people solved
Sep 6, 2025
LinkedIn logo
LinkedIn
Medium
Software EngineerSenior+ Locked

Design a metrics platform without alerting

This question evaluates a candidate's ability to design a scalable time-series metrics platform, covering data modeling for counters/gauges/histograms...

System DesignObservabilityStorage & Sharding
18
0
195 people solved
Dec 26, 2025
Adobe logo
Adobe
Medium
Software Engineer

Design a nested-list iterator

You are given a nested structure that can contain integers or further lists. Design an iterator over this structure that returns integers in left-to-r...

Coding & AlgorithmsData Structure DesignStacks & Queues
10
0
85 people solved
Sep 6, 2025
Thumbtack logo
Thumbtack
Medium
Data Scientist

Test regional response-rate differences rigorously

Goal Assess whether provider response rates differ by region after adjusting for job category mix and time. Data You have job-level observations with ...

Statistics & MathRegression & Statistical ModelingHypothesis Testing
13
0
95 people solved
Oct 13, 2025
Metropolis logo
Metropolis
Medium
Software Engineer

Describe disagreement with leadership and your approach

Give an example where you disagreed with a leader (your manager, a VP, CTO, etc.). - What was the disagreement about (technical direction, priorities,...

Behavioral & Leadership
8
0
70 people solved
Feb 12, 2026
Meta logo
Meta
Medium
Data Scientist

Write SQL for engagement and attribution KPIs

Using the schema and sample data below, answer the SQL tasks. Assume timestamps are UTC and comments with is_deleted=1 do not count. Schema: users(use...

Data Manipulation (SQL/Python)
3
0
25 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Easy
Data Scientist

Reverse a list in-place

Coding Task: Reverse a List In-Place (Python) Context You're implementing a utility function during a technical screen. The function must reverse a Py...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
13
0
113 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Software Engineer

Describe a project you are proud of

Prompt Spend ~30 minutes walking the interviewer through a software project you are proud of. What to cover - Problem & context: What was the user/bus...

Behavioral & Leadership
5
0
81 people solved
Jan 18, 2026
Akuna Capital logo
Akuna Capital
Medium
Software Engineer

Evaluate SQL expressions for zero

Which of the following SQL expressions evaluate to 0? Evaluate each independently, justify the result, and note any dialect-specific behavior (e.g., M...

Data Manipulation (SQL/Python)
4
0
31 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Data Scientist

Identify Date with Highest Total kWh Consumption Using Pandas

meter_readings +----------+------------+---------------+---------+ | meter_id | timestamp | kwh_consumed | city | +----------+------------+------...

Data Manipulation (SQL/Python)
64
0
22 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Identify Potential Users for Instagram Shopping Tab Adoption

Evaluates how to identify likely adopters of an Instagram Shopping tab and measure whether the feature creates incremental commerce value. Strong answ...

Analytics & Experimentation
36
0
116 people solved
Jul 12, 2025
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Design a Content Moderation Platform

This question evaluates a candidate's ability to design scalable, ML-driven content moderation platforms, assessing competencies in system architectur...

ML System Design
11
0
89 people solved
Apr 10, 2026
Meta logo
Meta
Medium
Software Engineer

Find k most frequent elements, discuss O(n)

Find k most frequent elements, discuss O(n) Given an integer array nums of length n and an integer k (where 1 ≤ k ≤ the number of distinct values in n...

Coding & Algorithms
7
0
56 people solved
Jul 27, 2025
Apple logo
Apple
Medium
Data Scientist

Find longest uniform substring after k replacements

Given a string s (ASCII, length up to 2e5) and integer k (0 ≤ k ≤ |s|), return the length of the longest substring that can be turned into all the sam...

Coding & Algorithms
6
0
64 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Explain Statistical Concepts in A/B Testing and Corrections

Explain Statistical Concepts in A/B Testing and Corrections A/B Testing: p-values, Power, and Error Rates with Multiple Comparisons Context You are re...

Statistics & Math
7
0
55 people solved
Aug 4, 2025
Upstart logo
Upstart
Medium
Data Scientist

Design Algorithm for Longest Substring with K Distinct Characters

Scenario Tech interview round 2 – sliding-window algorithm Question Design an algorithm that finds the length of the longest substring containing at m...

Coding & Algorithms
23
0
64 people solved
Aug 4, 2025
LendingClub logo
LendingClub
Medium
Data Scientist

Query Active Loans by Borrower ID in SQL

loans +---------+------------+----------+-----------+---------------+ | loan_id | borrower_id| amount | status | payment_date | +---------+-----...

Data Manipulation (SQL/Python)
1
0
30 people solved
Aug 4, 2025
Google logo
Google
Medium
Product Manager

Supermarket Experience Design

Product Design Prompt: Modern Supermarket Experience Pick one focus area for a modern supermarket and go deep: - In-store layout. - Checkout flow. - I...

Product / Decision Making
9
0
56 people solved
Jul 4, 2025
Optiver logo
Optiver
Medium
Data Scientist

Match alphanumeric patterns in a stream

Given a reference 7–8 character alphanumeric code and four candidate codes, select the exact match as quickly as possible. Design a system that: - Eff...

Coding & AlgorithmsData Structure DesignArrays & Strings
7
0
97 people solved
Sep 6, 2025
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