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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
Amazon logo
Amazon
Medium
Software EngineerSenior+

Implement a Fixed-Capacity Ring Buffer in C for Firmware

Implement a fixed-capacity ring buffer (circular buffer) in C. Its storage is set up once, and the write and read positions wrap back to the start of ...

Software Engineering FundamentalsData Structure DesignConcurrency
1
0
17 people solved
Oct 31, 2026
Google logo
GoogleBlackRockAmazon

Also asked at Amazon, Meta, Microsoft, Bloomberg, TCS, LinkedIn, Walmart Labs, Siemens, IBM, Intuit, Tripadvisor, Virtu Financial, Accolite, Epic Systems, Apple, Oracle, Zoho, Infosys, NVIDIA, Zulily, Yandex, Cerner, TikTok, Udemy

Easy
Software Engineer

Check Matching and Nested Brackets

Problem The string brackets contains only (, ), [, ], {, and }. Return true exactly when all brackets can be matched correctly; otherwise return false...

Coding & AlgorithmsStacks & QueuesParsing & Interpreters
3
0
38 people solved
Amazon logo
Amazon
Medium
Software Engineer

Stack Whose Pop Removes the Most Frequent Value, Ties Broken by Recency

A frequency stack holds integers and supports two operations: - push x: place x on top of the stack. - pop: remove and return the value that occurs mo...

Coding & AlgorithmsData Structure DesignStacks & Queues
32
0
347 people solved
Oct 2, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Build a Top-Down Reporting Forest from Employee-Manager Pairs

You are given a list of reporting relationships. Each person is identified by a positive integer ID, and each pair [employee, manager] means that empl...

Coding & AlgorithmsTrees
19
0
203 people solved
Sep 28, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Build a Rectangle Board with Remove-at-Cell, Batch Remove, and Undo

Implement a 2D board that holds axis-aligned rectangles. The requirements arrive one at a time, and each Part builds on your code from the previous on...

Software Engineering FundamentalsData Structure DesignLow-Level Design (OOP)
37
0
286 people solved
Aug 30, 2026
Jane Street logo
Jane Street
Medium
Machine Learning Engineer

Code Editor with Block Shrink and Expand (Code Folding)

Implement the core of a code editor (similar to VS Code) that supports code folding: collapsing ("shrink") and restoring ("expand") indentation-based ...

Coding & AlgorithmsData Structure Design
164
1
1626 people solved
Apr 24, 2026
Lyft logo
Lyft
Medium
Software Engineer

Wrapper Over a Paginated Page API That Fetches the Next N Words

You are given an external API that returns content one page at a time, and each page holds a variable number of words. Write a wrapper class around th...

Software Engineering FundamentalsAPI Integration & HTTP ClientsData Structure Design
28
0
211 people solved
Sep 24, 2026
Lyft logo
Lyft
Medium
Software Engineer

In-Memory Key-Value Store with Nested Begin, Commit, and Rollback Transactions

Implement an in-memory key-value store that supports transactions: - set(key, value) sets key to value. - unset(key) removes key. - get(key) returns t...

Software Engineering FundamentalsData Structure DesignTransactions & Isolation
17
0
136 people solved
Sep 24, 2026
Oracle logo
Oracle
Medium
Software Engineer

Remove parentheses from a plus/minus expression by propagating signs

You are given an algebraic expression made of single-letter variables, the operators + and -, and parentheses. Simplify it by removing every pair of p...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
1
0
15 people solved
Oct 29, 2026
Google logo
Google
Medium
Software Engineer

Detect timed-out RPC calls from paired start and end log records

A service writes a log record when a remote procedure call (RPC) starts and another when it ends. Given the log, in time order, and a timeout, report ...

Coding & AlgorithmsArrays & Strings
22
1
227 people solved
Sep 21, 2026
Aiprise logo
Aiprise
Easy
Software Engineer

Evaluate an Integer Expression String with +, -, * and Nested Parentheses

Write a function that evaluates an arithmetic expression given as a string and returns its integer value. The expression contains non-negative integer...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
1
0
19 people solved
Oct 25, 2026
Roblox logo
Roblox
Medium
Software Engineer

Most frequent call stack per thread from enter/exit logs, deeper stacks win ties

A program writes a log of function calls. Each log line records that a thread entered or exited a function. At any moment, each thread has its own cal...

Coding & AlgorithmsStacks & Queues
12
1
118 people solved
Aug 29, 2026
Oracle logo
Oracle
Medium
Software Engineer

Count requests dropped by stacked 1-, 10- and 60-second rate limits

A gateway enforces three rate limits at once: at most 3 requests in any one second, at most 20 requests in any 10-second span, and at most 60 requests...

Coding & AlgorithmsTwo Pointers & Sliding WindowRate Limiting
1
0
14 people solved
Oct 29, 2026
Jane Street logo
Jane Street
Medium
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
30
0
219 people solved
May 1, 2026
Oracle logo
Oracle
Medium
Software Engineer

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
9
0
84 people solved
Oct 7, 2026
Google logo
GoogleAmazonCitadel

Also asked at Citadel, Meta, TCS, Bloomberg, Microsoft, Grammarly, LinkedIn, Apple, Anduril, Apollo.io, Canonical, Infosys, Oracle, Goldman Sachs

Medium
Software Engineer

Evaluate Postfix Arithmetic with Truncating Integer Division

Problem Evaluate a valid arithmetic expression written in reverse Polish notation. Tokens are integer operands or the binary operators +, -, *, and /....

Coding & AlgorithmsStacks & QueuesParsing & Interpreters
2
0
30 people solved
OpenAI logo
OpenAI
Hard
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
18
0
156 people solved
Sep 20, 2026
Abridge logo
Abridge
Hard
Software Engineer

Expand a Nested Repeat-Count Encoded String

You are given an encoded string s. The encoding rule is k[text]: the text inside the square brackets is repeated exactly k times, where k is a positiv...

Coding & AlgorithmsStacks & QueuesParsing & Interpreters
2
0
57 people solved
Sep 24, 2026
Decagon logo
Decagon
Medium
Software Engineer Locked

Shopping Cart with Undo and Redo for Add and Remove Operations

A coding exercise to build a shopping cart class whose add and remove operations can be undone and redone. It tests how history entries are represente...

Software Engineering FundamentalsLow-Level Design (OOP)Stacks & Queues
19
0
278 people solved
Sep 18, 2026
Jane Street logo
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
53
0
996 people solved
Jun 4, 2026
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