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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 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."

Showing 20 results
DoorDash logo
DoorDash
Medium
Software EngineerSenior+

Solve BFS grid delivery routing

You are given an m×n grid representing a city: 'S' are DashMart stores, 'H' are homes, '.' are roads, and '#' are obstacles. Movement is allowed in fo...

Coding & AlgorithmsGrids & MatricesStacks & Queues
15
0
131 people solved
Jul 31, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Evaluate arithmetic expression with variables

Implement an expression evaluator for a string expr containing non-negative integers, variables (alphabetic names), operators +, -, , /, parentheses '...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
8
0
140 people solved
Aug 14, 2025
Optiver logo
Optiver
Medium
Software Engineer

Design an object-oriented queue and compare implementations

Design an object-oriented queue and compare implementations You are asked to design an object-oriented Queue abstraction and discuss how it can be imp...

Software Engineering FundamentalsData Structure Design
51
0
430 people solved
Jul 19, 2025
Optiver logo
Optiver
Medium
Software Engineer

Compare common data structures and uses

Compare common data structures and uses Compare common data structures and select appropriate ones for specific tasks. For arrays, linked lists, stack...

Coding & AlgorithmsTrees
29
0
262 people solved
Jul 17, 2025
Google logo
Google
Medium
Software Engineer

Optimize 0/1 to bounded knapsack DP

Solve the 0/1 knapsack problem: given arrays weight[i], value[i] for i=0..n-1 and capacity W, return the maximum value and reconstruct one optimal set...

Coding & AlgorithmsDynamic Programming
12
0
182 people solved
Sep 6, 2025
Uber logo
Uber
Hard
Software Engineer

Implement three interview-style coding tasks

You are given three separate coding tasks, all focused on algorithm and data-structure design. --- Task 1: Longest Bounded-Difference Subarray You are...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design
18
0
162 people solved
Nov 11, 2025
Jump Trading logo
Jump Trading
Medium
Machine Learning Engineer

Solve stock-pattern trading and substring elimination

Part A — Stock trading by pattern signals: - Input: an integer array prices (length n) of daily stock prices; an array buyPattern and an array sellPat...

Coding & AlgorithmsArrays & StringsStacks & Queues
10
0
190 people solved
Aug 1, 2025
PayPal logo
PayPal
Medium
Data Scientist

Design elevator scheduling for small building

Design elevator scheduling for small building Design the control policy for a single elevator serving a small building: 3 floors plus 1 basement (stop...

System DesignSimulation & State MachinesSystem Design Fundamentals
11
0
134 people solved
Jul 31, 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
12
0
97 people solved
Sep 6, 2025
CloudKitchens logo
CloudKitchens
Medium
Software Engineer

Answer static and streaming Top-K queries

Top-K in static and streaming settings (3 variants) You are given integers and asked to answer Top-K queries under three different scenarios. Variant ...

Coding & AlgorithmsHeaps & Priority QueuesData Structure Design
14
0
184 people solved
Aug 20, 2025
Jane Street logo
Jane Street
Easy
Software Engineer

Stack Machine Interpreter with Typed Int and String Values

You are building an interpreter for a simple stack machine. The machine has a single stack, and every value on the stack is one of exactly two primiti...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
68
1
528 people solved
Apr 28, 2022
Google logo
Google
Medium
Software Engineer Locked

Find Shortest Queue with Few Calls

This question evaluates algorithm design and analysis skills, focusing on working with restricted data structure APIs and minimizing total operations ...

Coding & AlgorithmsStacks & Queues
11
2
134 people solved
Apr 10, 2026
HubSpot logo
HubSpot
Medium
Software EngineerSenior+

Evaluate an Integer Arithmetic Expression Written in Prefix (Polish) Notation

In prefix notation, also called Polish notation, every operator is written before its two operands, so parentheses are never needed. For example, the ...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
1
0
16 people solved
Jan 2, 2026
TikTok logo
TikTok
Medium
Software Engineer Locked

Solve common string/DP/stack problems

This set of four coding tasks evaluates proficiency in string algorithms, dynamic programming, sliding-window techniques, monotonic stack usage, and t...

Coding & AlgorithmsTwo Pointers & Sliding WindowDynamic Programming
13
0
174 people solved
Feb 12, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Check balanced parentheses with multiple bracket types

Given a string containing only parentheses '()', determine whether it is balanced. Follow-up: extend the solution to also support '[]' and '{}' with c...

Coding & AlgorithmsStacks & Queues
14
0
114 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Construct a BST and read spiral order

The coding round reportedly included two algorithmic tasks: 1. Rebuild a binary search tree from a preorder sequence - You are given an array of di...

Coding & AlgorithmsTreesGrids & Matrices
20
0
139 people solved
Mar 4, 2026
Microsoft logo
Microsoft
Hard
Software Engineer

Design a Multilingual Written-Number Parser with a Stack

Design a parser that converts written number expressions in languages such as English, Chinese, and Japanese into numeric values. Compare a section-ac...

Software Engineering FundamentalsParsing & InterpretersStacks & Queues
0
0
6 people solved
Apr 1, 2026
Liftoff logo
Liftoff
Hard
Machine Learning Engineer

Key-Value Store with Checkpoint Rollback and Ambiguity-Aware Prefix Reads

Implement an in-memory key-value store with string keys and string values. Besides ordinary writes, it must support two features: - Checkpoints. The c...

Software Engineering FundamentalsData Structure DesignTrees
1
0
20 people solved
Jul 6, 2026
Instacart logo
Instacart
Medium
Software Engineer

Solve expression evaluator and string decoder

1) Implement an arithmetic expression evaluator that reads expressions from a text file (one expression per line) and outputs the evaluated result for...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
39
0
301 people solved
Sep 6, 2025
Apple logo
Apple
Easy
Software Engineer

Solve three easy algorithm problems

You are given three independent algorithmic tasks. For each one, explain your approach (no need to run code). 1) Merge two sorted lists (integers inst...

Coding & AlgorithmsStacks & Queues
43
0
367 people solved
Nov 11, 2025
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