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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
Grammarly logo
Grammarly
Medium
Software Engineer

Implement a Transactional Key-Value Store

Design an in-memory key-value store that supports transactions. Required operations: - set(key, value): assign or overwrite the value for a key. - get...

Coding & AlgorithmsData Structure DesignStacks & Queues
20
0
214 people solved
Apr 6, 2026
Amazon logo
AmazonTwilioAgoda

Also asked at Agoda, Google, Oracle, Salesforce, Bloomberg, Meta, Attentive, Grammarly, Goldman Sachs, Microsoft, Walmart Labs, Couchbase, Morgan Stanley, TikTok

Medium
Software Engineer

Erase Equal Adjacent Runs of Size k

Problem Repeatedly remove k adjacent equal letters from s, joining the two surrounding pieces after every removal. Return the final string when no rem...

Coding & AlgorithmsStacks & QueuesArrays & Strings
0
0
12 people solved
Oracle logo
Oracle
Medium
Software Engineer

Decide Whether a Parenthesis String With Star Wildcards Can Be Balanced

Given a string made only of the characters (, ) and `, decide whether it can be turned into a balanced parenthesis string by replacing every , indepen...

Coding & AlgorithmsGreedy
3
0
34 people solved
Sep 9, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Generate Function Profiling Events from Stack Samples

Generate Function Profiling Events from Stack Samples You receive timestamped call-stack samples in increasing timestamp order. Each sample is (timest...

Coding & AlgorithmsStacks & QueuesSimulation & State Machines
33
0
313 people solved
Apr 13, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Make a Hostname-Limited Crawler Concurrent

Build a concurrent hostname-limited crawler that removes fragments before deduplication, prevents duplicate fetches, and detects crawl completion corr...

Software Engineering FundamentalsConcurrencyGraphs
10
1
111 people solved
Sep 3, 2026
DevRev logo
DevRevAmazonGoogle

Also asked at Google, Meta, Microsoft, Bloomberg

Hard
Software Engineer

Find the Shortest Contiguous Segment Reaching a Sum Threshold

Problem Return the minimum length of a nonempty contiguous segment of nums whose sum is at least k. Return -1 if no segment qualifies. Values may be n...

Coding & AlgorithmsStacks & QueuesArrays & Strings
1
0
14 people solved
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Microsoft, Meta, Apple, Infosys, Qualcomm, Yandex, TikTok, Arista Networks

Easy
Software Engineer

Implement FIFO Operations with Two Stacks

Problem Implement MyQueue with its original constructor and push, pop, peek and empty methods. push appends a value, pop removes and returns the oldes...

Coding & AlgorithmsData Structure DesignStacks & Queues
1
0
12 people solved
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Mark and Compact a Heap-Indexed Subtree

In a dense heap-indexed binary tree array, mark a target node and all indexed descendants with -1, then stable-compact the survivors. Return separate ...

Coding & AlgorithmsTreesArrays & Strings
9
0
141 people solved
Jul 2, 2026
Amazon logo
AmazonTikTokPaytm

Also asked at Paytm, Microsoft, Google, Bloomberg, Meta, Expedia, ByteDance, Zoho, Deshaw

Medium
Software Engineer

Keep One of Each Letter in the Smallest Subsequence

Problem Delete characters from s so every distinct input letter appears exactly once, while the remaining sequence is lexicographically smallest among...

Coding & AlgorithmsGreedyStacks & Queues
1
0
8 people solved
Amazon logo
Amazon
Medium
Software Engineer

Design a Structure That Returns the Max of the Last k Inserted Numbers

Design a data structure that receives a stream of numbers and reports the maximum of the most recent k numbers inserted. Implement this interface: `py...

Software Engineering FundamentalsData Structure DesignStacks & Queues
2
0
25 people solved
Aug 29, 2026
Microsoft logo
MicrosoftBloombergGoogle

Also asked at Google, Meta, Amazon, IBM, Siemens

Medium
Software Engineer

Insert the Fewest Parentheses to Make a String Balanced

Problem A valid parentheses string is empty, a concatenation of two valid strings, or a valid string enclosed in one matching pair. Given s, insert on...

Coding & AlgorithmsGreedyStacks & Queues
1
0
9 people solved
Amazon logo
AmazonGoogleBloombergMicrosoft

Also asked at Bloomberg, Microsoft

Medium
Software Engineer

Split Parentheses to Minimize the Larger Depth

Problem The input seq is a valid parentheses string. Assign every character to subsequence A or B while preserving order in each, so both are valid pa...

Coding & AlgorithmsStacks & QueuesGreedy
0
0
9 people solved
Anthropic logo
Anthropic
Medium
Software Engineer

Convert stack samples to trace events

Question Implement convertToTrace(samples) that, given a chronologically ordered vector of stack samples (each sample contains a timestamp and a call-...

Coding & AlgorithmsStacks & QueuesSimulation & State Machines
233
4
1523 people solved
Jul 29, 2025
Figma logo
Figma
Medium
Software Engineer Locked

Validate a Balanced INDENT and DEDENT Token Stream

Validate whether an INDENT and DEDENT token stream remains balanced at every prefix and closes all open levels at the end. This compact problem tests ...

Coding & AlgorithmsStacks & Queues
23
1
220 people solved
Jul 21, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a Key-Value Store with Hit Counting

Design an in-memory key-value store whose successful reads feed a configurable per-key hit counter over time windows. Clarify counting semantics, then...

Software Engineering FundamentalsData Structure DesignStacks & Queues
18
0
210 people solved
Jul 25, 2026
Uber logo
Uber
Medium
Software Engineer

Solve these algorithmic problems

You are given the following independent coding tasks. For each task, design an algorithm and implement a function that returns the requested output. -...

Coding & AlgorithmsDynamic ProgrammingBinary Search
77
2
620 people solved
Feb 11, 2026
Google logo
GoogleRocketLaneMeta

Also asked at Meta, Microsoft, Amazon, Oracle, Rippling, ServiceNow, Expedia, Waymo, LinkedIn, NVIDIA

Hard
Software Engineer

Count Visible People to the Right

Problem People stand from left to right with distinct heights given by heights. Person i can see person j to the right when every person strictly betw...

Coding & AlgorithmsStacks & Queues
2
0
15 people solved
LinkedIn logo
LinkedIn
Easy
Software Engineer AI Locked

Debug Queues and Solve Arrays

This multi-part question evaluates competencies in data structures (heap invariants and in-place array manipulation), concurrent programming (designin...

Coding & AlgorithmsHeaps & Priority QueuesArrays & Strings
19
0
259 people solved
Mar 10, 2026
Socure logo
Socure
Hard
Software Engineer Locked

Implement a Concurrent Payment Queue with Visibility Timeouts

Implement an in-memory payment queue with atomic receives, visibility timeouts, ACK races, stale-callback protection, and idempotent payment processin...

Software Engineering FundamentalsConcurrencyData Structure Design
8
0
58 people solved
Sep 5, 2026
Uber logo
Uber
Medium
Software Engineer

Solve 12 coding interview problems

Below are multiple independent coding problems. --- Problem 1: Reduce an integer to 0 with \(\pm 2^i\) You are given a positive integer \(n\). In one ...

Coding & AlgorithmsDynamic ProgrammingBinary Search
372
0
3900 people solved
Feb 12, 2026
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