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

J.P. Morgan

Easy

Software Engineer

Improve shopping cart latency and stock notifications

You are given an existing e-commerce shopping cart system (web/mobile) that already supports adding/removing items and viewing the cart. The interview...

System DesignReal-Time SystemsCaching

Implement a min-heap column allocator

You are given an integer k (number of columns) and an array posts of positive integers where posts[i] is the height of the i-th post. All columns star...

Coding & AlgorithmsHeaps & Priority QueuesData Structure Design

Implement most_frequent_key without using max()

Problem (Python OOP) You are given two classes. Parent precomputes frequency counts of items (as strings) from an input list. `python class Parent: ...

Coding & AlgorithmsArrays & StringsProgramming Languages

Software Engineer Locked

Design a Population-Weighted Random Country Picker

Design an immutable weighted random country picker whose selection probability is proportional to population. Precompute cumulative integer weights, d...

Software Engineering FundamentalsMath & Number Theory

Implement PyTorch training loop

Implement a basic PyTorch training loop You are given a PyTorch neural network model, a DataLoader that yields (inputs, targets) batches, an optimizer...

Coding & AlgorithmsML CodingNeural Networks & Training

Find max consecutive elements with sum below target

You are given: - An integer array nums of length n, sorted in non-decreasing order. - An integer index such that 0 ≤ index < n. - An integer target. S...

Coding & AlgorithmsArrays & Strings

Implement a simplified multi-level banking system

Implement a simplified multi-level banking system Implement a simplified banking system with multi-level requirements. All operations accept a stringi...

Coding & AlgorithmsPayments & LedgersData Structure Design

169 people solved

Jul 17, 2025

Write SQL to compare social-only vs game-only engagement

You are given two tables capturing Oculus app usage. Define an 'active day' as a UTC date on which a user generates at least one event. Consider only ...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis

367 people solved

Oct 13, 2025

Design image and multimodal generation systems

System Design: Image Generation and Multimodal Generation Part 1 — End-to-End Image Generation System Design an end-to-end image generation system. Co...

ML System DesignGenerative ModelsNeural Networks & Training

Implement piecewise linear interpolation for time-to-empty

Time-to-Empty from a Discharge Curve (Piecewise Linear Interpolation) Implement a function time_to_empty(checkpoints, current_soc) that returns the nu...

Coding & Algorithms

74 people solved

Oct 13, 2025

Design a nearby places (proximity) service

Design a proximity search service like Yelp/Google Maps. Requirements: - Store places with (place_id, name, lat/lng, category, rating). - Query: “find...

Find common friends from directed edges

You have a directed edge list that records who followed whom. A mutual “friendship” exists only if both directions appear (A→B and B→A). Schema and sa...

Data Manipulation (SQL/Python)GraphsSQL

Interpret a Smart Wait Launch with Conflicting Metrics

A product changes its wait-time display to show more conservative estimates. After launch, conversion falls by 5% while actual time to pickup falls by...

Analytics & ExperimentationMetric DiagnosticsCausal Inference

Machine Learning Engineer

Discuss Transformer LLM Design

Discuss Transformer LLM Design System-Design-Oriented LLM Question Context: You are designing, fine-tuning, and operating a Transformer-based large la...

ML System DesignTransformers & AttentionFine-Tuning & Alignment Techniques

Resolve a Work Conflict Clearly and Concisely

Describe a conflict at work and how you resolved it. Present the cause, your actions, and the result clearly before adding supporting detail. Constrai...

Behavioral & LeadershipConflict & CollaborationCommunication & Stakeholders

Detect whether a directed graph given as an edge list contains a cycle

You are given a directed graph with n nodes labeled 0 to n - 1 and a list of directed edges. Return whether the graph contains at least one directed c...

Coding & AlgorithmsGraphs

Maximum Group of Pairwise Strangers in an Acquaintance Tree

You are given a social network of n people, labeled 0 through n - 1. For some pairs of people, it is known that the two people in the pair know each o...

Design dasher-to-order assignment algorithm

You are building a real-time 'dasher picker' that assigns delivery drivers (Dashers) to incoming orders. Define objective(s) (e.g., minimize ETA and c...

Build ETA prediction and simulate impact

Predicting Delivery ETA (Minutes) Context You are given a take-home dataset with order-, store-, and dasher-level features. The goal is to predict del...

Machine LearningML System DesignFeature Engineering

Frontend Engineer Locked

Build a Stateful Calculator

This question evaluates a candidate's ability to model and manage UI state, handle event-driven input, and implement correct operator chaining in a ca...

Software Engineering FundamentalsState ManagementUI Components & Accessibility

132 people solved

Dec 13, 2025

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Tech Interview Questions

Improve shopping cart latency and stock notifications

Implement a min-heap column allocator

Implement most_frequent_key without using max()

Design a Population-Weighted Random Country Picker

Implement PyTorch training loop

Find max consecutive elements with sum below target

Implement a simplified multi-level banking system

Write SQL to compare social-only vs game-only engagement

Design image and multimodal generation systems

Implement piecewise linear interpolation for time-to-empty

Design a nearby places (proximity) service

Find common friends from directed edges

Interpret a Smart Wait Launch with Conflicting Metrics

Discuss Transformer LLM Design

Resolve a Work Conflict Clearly and Concisely

Detect whether a directed graph given as an edge list contains a cycle

Maximum Group of Pairwise Strangers in an Acquaintance Tree

Design dasher-to-order assignment algorithm

Build ETA prediction and simulate impact

Build a Stateful Calculator

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