Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

12.2k

Companies

569

Updated

10.14.2026

12.2k Questions 569 Companies10.14.2026

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

Netflix

Medium

Data Scientist

Critique culture memo and design probes

Interpreting a Company Culture Memo (Data Scientist, HR Screen) You are interviewing for a Data Scientist role at a tech company that publishes a publ...

Behavioral & LeadershipEthics & ResponsibilityCommunication & Stakeholders

Select the best dasher for an order

You need to assign an order to a dasher. Input: - An order with a pickup location (x, y). - A list of dashers, each with: - id - current location ...

Software Engineer Locked

Design a Driver Leaderboard Based on Reviews

Design a service that ranks drivers from customer reviews and serves a top-driver leaderboard. Connect requirements and APIs to data modeling, consist...

Resolve Two Knights-and-Knaves Statements

Resolve Two Knights-and-Knaves Statements An island has knights, who always tell the truth, and knaves, who always lie. Two people, A and B, make thes...

Software Engineer Locked

Find conflicting pair using black-box run()

This question evaluates algorithm design and query-complexity reasoning, focusing on efficient search strategies for identifying an interacting pair v...

Coding & AlgorithmsBinary SearchDebugging

Contrast UI vs backend testing; design UI-change test cases

Part A — Differentiate UI vs backend testing: For a single-page web app backed by a BFF (backend-for-frontend) that calls a payment API, explain preci...

Behavioral & Leadership

Sort and merge string lists by length

Given two unsorted lists of strings, return a single list sorted by ascending string length. Specify your tie-breaking rule for equal-length strings (...

Data ScientistSenior+

Transform DataFrame and compute diff-in-diff

You are given a pandas DataFrame df with the following columns: - unit_id (string): entity identifier (e.g., user, city, driver) - group (string): eit...

Data Manipulation (SQL/Python)Pandas & Python Data

268 people solved

Dec 11, 2025

Demonstrate leadership and ensure data compliance

Behavioral & Leadership: Leading Through Reorg While Shipping ML + Ensuring Data Compliance Context You are the ML lead during a reorganization that r...

Behavioral & Leadership

Design a battery-life predictor and cold-start strategy

Smartphone Time-to-Empty (TTE) Prediction — Baseline, Features, Cold Start, Evaluation, and Monitoring Context You are building a per-device predictor...

Machine LearningML System DesignFeature Engineering

Check perfect square using binary search

Perfect Square Check (Binary Search) Given a positive integer n, determine whether it is a perfect square (i.e., there exists an integer x such that x...

Coding & AlgorithmsBinary Search

Software EngineerNew Grad

Compute the Nth Recency Value

Given an integer n >= 1, define a sequence a as follows: - a[0] = 0 - For each i >= 1: - If a[i - 1] has appeared earlier in the sequence, meaning t...

Encode and Rebuild a Binary Tree

Design two functions for a binary tree: - encode(root) -> string - decode(data) -> root Each tree node contains an integer value and has up to two chi...

Coding & AlgorithmsTrees

Compute Fitness App DAU

You are working on a fitness app. The schema is: users(user_id BIGINT, signup_ts TIMESTAMP, timezone VARCHAR, is_test_user BOOLEAN) and app_events(eve...

Data Manipulation (SQL/Python)SQL

Implement Bootstrap-like responsive utility classes

Build a Bootstrap-like Utility System and Accessible Responsive Form (No External CSS) Context You are asked to create a minimal, reusable CSS utility...

Software Engineering Fundamentals

Data ScientistSenior+

Implement streaming k-way merge with constraints

Implement a function merge_k(iterators, N) that returns the first N items of the global ascending order from k sorted, potentially unbounded iterators...

Coding & AlgorithmsHeaps & Priority Queues

Detect memory leaks in C++

Detect memory leaks in C++ C++ Memory Leaks: Detection, Integration, and Prevention You are building or maintaining a C++ service/library and need a p...

Software Engineering Fundamentals

Diagnose a Sudden Revenue Decline: Analyses, Metrics, and Root-Cause Tests

Diagnose a Sudden Revenue Decline: Analyses, Metrics, and Root-Cause Tests Scenario A key revenue metric on Coinbase's dashboard suddenly declines—for...

Analytics & Experimentation

104 people solved

Aug 4, 2025

Debug and optimize React performance issues

Debug and optimize React performance issues React Debugging and Performance Assessment Background You're reviewing a React single-page application dur...

Software EngineerIntern Locked

Find shortest subarray with ≥k distinct integers

This question evaluates understanding of array algorithms, handling of distinct-element counting, and the ability to design time- and space-efficient ...

Coding & Algorithms

81 people solved

Jan 6, 2026

Tech Interview Questions

Critique culture memo and design probes

Select the best dasher for an order

Design a Driver Leaderboard Based on Reviews

Resolve Two Knights-and-Knaves Statements

Find conflicting pair using black-box run()

Contrast UI vs backend testing; design UI-change test cases

Sort and merge string lists by length

Transform DataFrame and compute diff-in-diff

Demonstrate leadership and ensure data compliance

Design a battery-life predictor and cold-start strategy

Check perfect square using binary search

Compute the Nth Recency Value

Encode and Rebuild a Binary Tree

Compute Fitness App DAU

Implement Bootstrap-like responsive utility classes

Implement streaming k-way merge with constraints

Detect memory leaks in C++

Diagnose a Sudden Revenue Decline: Analyses, Metrics, and Root-Cause Tests

Debug and optimize React performance issues

Find shortest subarray with ≥k distinct integers

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