Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

404

Companies

980

Updated

11.12.2026

404 Questions 980 Companies11.12.2026

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

Apple

Hard

Software Engineer

Implement a Thread-Safe Bounded Blocking Queue for Producers and Consumers

You are asked to implement a queue that producer threads and consumer threads share. Producers add items, consumers remove them in first-in, first-out...

Software Engineering FundamentalsConcurrency

Software EngineerIntern

Write an Interpreter for a Small Language with Load, Store and Arithmetic

Implement an interpreter for a small programming language designed for the interview. The language already defines simple load and store instructions ...

Software Engineering FundamentalsParsing & InterpretersStacks & Queues

Repeatedly Delete Runs of k Adjacent Equal Characters from a String

You are given a string s of lowercase English letters and an integer k. A removal deletes k adjacent, equal characters from the string, and the parts ...

Coding & AlgorithmsStacks & Queues

Software Engineer Locked

Parse a Custom Record with Fixed Fields, Mapped Keys, and Nested Lists

Design a grammar-aware parser for fixed fields and a marked free-form section, including enum conversions, mapped keys, nested commas, and duplicate p...

Software Engineering FundamentalsParsing & Interpreters

Software Engineer Locked

Text Editor in Four Stages: Buffer, Undo/Redo, Trie Autocomplete, Collaborative OT

Build a text editor in four stages: a buffer with insert, delete and read, undo and redo with two stacks, trie-based autocomplete ranked by word frequ...

Software Engineering FundamentalsData Structure DesignReal-Time Systems

156 people solved

Sep 20, 2026

GoogleAmazonBloomberg

Easy

Software Engineer

Traverse Binary-Tree Values in Left-Root-Right Order

Problem Return the node values of a binary tree in inorder: traverse the left subtree, then the current node, then the right subtree. The input is an ...

Coding & AlgorithmsTrees

23 people solved

Jane Street

Medium

Software Engineer Locked

Collapsible Code Editor: Brace Matching and Toggle

This question tests stack-based parsing and stateful data structure design through a two-part brace-matching and collapsible editor problem. It evalua...

Coding & AlgorithmsData Structure DesignStacks & Queues

Delete the Fewest Parentheses to Balance a String of Only Open and Close Brackets

You are given a string s that contains only the characters '(' and ')'. Delete the minimum number of characters so that the remaining string is balanc...

Coding & AlgorithmsStacks & Queues

Find the first larger value for every element of a circular array

You are given an integer array nums that is treated as circular: after the last element, scanning continues from the first element. For every index i,...

Coding & AlgorithmsStacks & Queues

Object-Oriented Design of a Two-Player Chess Game: Board, Pieces, Moves, Game End

In an object-oriented design phone screen, the question was: design chess. Design the classes for a two-player chess game that can be played to comple...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines

Overlay two binary trees into one by summing values at shared positions

You are given two binary trees. Merge them into one new binary tree by overlaying them, with the two roots aligned. Where both trees have a node at th...

Coding & AlgorithmsTrees

Software Engineer Locked

Implement an ObjectTracker That Merges Observations From Two Perception Systems

Two perception systems track the same objects under different IDs. Implement an ObjectTracker with addLink, addObservation and getHistory that returns...

Software Engineering FundamentalsData Structure DesignGraphs

Software Engineer Locked

Convert Streaming Call-Stack Samples into Function Events

Convert timestamped call-stack samples into ordered function start and end events, preserving frame depth and recursive occurrences. Handle stack chan...

Coding & AlgorithmsArrays & StringsStacks & Queues

Longest Balanced Parentheses Substring

Problem You receive a string brackets whose characters are all ( or ). Return the greatest length of a contiguous substring that forms a well-formed p...

Coding & AlgorithmsStacks & QueuesArrays & Strings

Simulate a Stack from Push, Pop and End-of-Input Commands

Simulate a stack driven by a stream of text commands and report what it outputs. The commands arrive as one string of whitespace-separated tokens: - U...

Coding & AlgorithmsStacks & Queues

Machine Learning EngineerNew Grad Locked

Dynamic Batching Decode Loop for a Mock Language Model with Slot Refilling

An LLM inference coding question: write the generation loop for a mock language model that returns one next token per sequence in a batch. Requests fi...

Software Engineering FundamentalsLLM Inference & Serving

Minimize String Length by Deleting AB and BB Pairs

Given a string seq containing only A and B, you may repeatedly delete either adjacent substring AB or adjacent substring BB. After each deletion, conc...

Coding & AlgorithmsStacks & QueuesArrays & Strings

Software Engineer Locked

Compute Buffet Revenue with Waiting Guests and Repeat Visits

Simulate buffet seating, FIFO waiting, early departures, and repeat visits while charging each guest at most once per day.

Coding & AlgorithmsSimulation & State MachinesStacks & Queues

One-pass S-expression parser with nested lists and precise error handling

Implement a parser for a simplified S-expression language. The exercise has three parts that build on one another. The parser must read the input sequ...

Software Engineering FundamentalsParsing & InterpretersBacktracking & Recursion

163 people solved

Aug 4, 2026

SquarepointGoogleMicrosoft

Hard

Software Engineer

Maintain Editable Text around a Bounded Cursor

Problem Implement TextEditor, initially containing empty text with its cursor at the beginning. - addText(text) inserts the supplied text at the curso...

Coding & AlgorithmsData Structure DesignArrays & Strings

42 people solved

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Tech Interview Questions

Implement a Thread-Safe Bounded Blocking Queue for Producers and Consumers

Write an Interpreter for a Small Language with Load, Store and Arithmetic

Repeatedly Delete Runs of k Adjacent Equal Characters from a String

Parse a Custom Record with Fixed Fields, Mapped Keys, and Nested Lists

Text Editor in Four Stages: Buffer, Undo/Redo, Trie Autocomplete, Collaborative OT

Traverse Binary-Tree Values in Left-Root-Right Order

Collapsible Code Editor: Brace Matching and Toggle

Delete the Fewest Parentheses to Balance a String of Only Open and Close Brackets

Find the first larger value for every element of a circular array

Object-Oriented Design of a Two-Player Chess Game: Board, Pieces, Moves, Game End

Overlay two binary trees into one by summing values at shared positions

Implement an ObjectTracker That Merges Observations From Two Perception Systems

Convert Streaming Call-Stack Samples into Function Events

Longest Balanced Parentheses Substring

Simulate a Stack from Push, Pop and End-of-Input Commands

Dynamic Batching Decode Loop for a Mock Language Model with Slot Refilling

Minimize String Length by Deleting AB and BB Pairs

Compute Buffet Revenue with Waiting Guests and Repeat Visits

One-pass S-expression parser with nested lists and precise error handling

Maintain Editable Text around a Bounded Cursor

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