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

Rippling

Medium

Software Engineer

Find minimum of unknown convex function

You are given access to an unknown univariate convex function $f(x)$ defined on a closed interval $[L, R]$ on the real line. - You cannot see the ...

Machine LearningBinary Search

Evaluate friend-interaction feature with network interference

Experiment Design: Network-Aware Test for a "Friend Interaction Boost" in Feed Ranking Context You plan to ship a ranking change that boosts items in ...

Analytics & Experimentation

Data Scientist Locked

Design a house-price prediction model

This question evaluates machine learning and data science competencies including regression model design, feature engineering, data-splitting and leak...

Machine Learning

81 people solved

Dec 15, 2025

Solve weighted pick and product except self

Question LeetCode 528. Random Pick with Weight LeetCode 238. Product of Array Except Self https://leetcode.com/problems/random-pick-with-weight/descri...

Design distributed word count without MapReduce

System Design: Distributed Word Frequency Counting (No MapReduce) Context You need to design a distributed system that computes word frequencies over ...

System DesignBatch & Stream ProcessingDistributed Transactions & Idempotency

142 people solved

Sep 6, 2025

Forecast Next Year's Revenue Using YoY% Analysis

ad_revenue +------------+---------+ | date | revenue | +------------+---------+ | 2023-01-01 | 1000 | | 2023-01-02 | 1200 | | 2024-01-01 |...

Data Manipulation (SQL/Python)

Solve Magic Dictionary and unknown traversal

Solve Magic Dictionary and unknown traversal LeetCode 676. Implement Magic Dictionary Determine and implement traversal/encoding that outputs nodes as...

Coding & AlgorithmsData Structure DesignTrees

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

Applied Scientist Locked

Implement Multi-Head Attention from Scratch in NumPy

This coding question tests a machine learning engineer's understanding of Transformer internals by requiring a from-scratch NumPy implementation of mu...

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

Detect Overfitting or Underfitting in Logistic Regression Models

Detect Overfitting or Underfitting in Logistic Regression Models Logistic Regression Bias–Variance in High‑Dimensional Ads Prediction Scenario You are...

Machine LearningRegression & Statistical ModelingML Fundamentals

Find a special person using knows(a,b)

Problem You are given n people labeled 0 to n-1 at a party. You can call an API: - knows(a, b) -> bool: returns true if person a knows person b, other...

Coding & AlgorithmsGraphs

Software Engineer Locked

Solve meeting-room scheduling and shortest paths

This question evaluates proficiency in interval scheduling and resource allocation as well as shortest-path computation in weighted directed graphs, e...

Coding & AlgorithmsIntervals & SchedulingGraphs

Discuss queues, NoSQL, and concurrency

System Design Concepts: Messaging, Storage Choices, and Concurrency Context: You are designing distributed services that communicate via events and mu...

System DesignMessaging & Event-DrivenStorage & Sharding

Machine Learning EngineerSenior+

Explain the Bellman Equation

Explain the Bellman Equation State and explain the Bellman expectation and optimality equations. Show how they decompose value into immediate reward a...

Software Engineer Locked

Compare Quicksort and Mergesort in Practice

Compare Quicksort and Mergesort as real implementation choices rather than reciting headline complexity. The discussion examines partition and merge i...

Software Engineering Fundamentals

Machine Learning Engineer

Implement and explain positional encoding

Implement Positional Encodings for a Transformer Language Model You are building a Transformer-based language model. Transformers are permutation-equi...

Machine LearningTransformers & AttentionML Coding

160 people solved

Sep 6, 2025

Evaluate expression without stack, constant space

Evaluate expression without stack, constant space Given a string s representing a valid arithmetic expression of non-negative integers, the operators ...

Software Engineer Locked

Return Binary Search Tree Values in Ascending Order

Decode a breadth-first binary-search-tree representation and return every stored value in nondecreasing order. This task evaluates precise deserializa...

Solve two logic brain teasers

Two Classic Logic/Optimization Puzzles Puzzle 1: Heavier Ball with a Balance Scale You have 12 visually identical balls. Exactly one ball is heavier t...

Statistics & MathPuzzles & BrainteasersGreedy

130 people solved

Sep 6, 2025

Tech Interview Questions

Find minimum of unknown convex function

Evaluate friend-interaction feature with network interference

Design a house-price prediction model

Solve weighted pick and product except self

Design distributed word count without MapReduce

Forecast Next Year's Revenue Using YoY% Analysis

Solve Magic Dictionary and unknown traversal

Format VARCHAR amounts into $ with M/B suffix

Implement Multi-Head Attention from Scratch in NumPy

Supermarket Experience Design

Detect Overfitting or Underfitting in Logistic Regression Models

Find a special person using knows(a,b)

Solve meeting-room scheduling and shortest paths

Discuss queues, NoSQL, and concurrency

Explain the Bellman Equation

Compare Quicksort and Mergesort in Practice

Implement and explain positional encoding

Evaluate expression without stack, constant space

Return Binary Search Tree Values in Ascending Order

Solve two logic brain teasers

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ML System Design

System Design Interview