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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
Anthropic logo
Anthropic
Medium
Machine Learning Engineer

Convert stack samples to execution trace

You are given sampling-profiler output: a list of Sample objects ordered by timestamp ascending. Each Sample has (t: float, stack: list[str]) where st...

Coding & AlgorithmsStacks & Queues
74
0
1202 people solved
Sep 6, 2025
Walmart Labs logo
Walmart Labs
Medium
Software Engineer

Compute days until plants stop dying

You are given a row of plants, each with an integer pesticide level. Rules - On each day, any plant with a strictly greater pesticide level than the p...

Coding & AlgorithmsStacks & Queues
26
0
477 people solved
Mar 1, 2026
Google logo
GoogleInfosysMongoDB

Also asked at MongoDB, Uber, Amazon, PhonePe, Capital One, Microsoft, Meta, Visa, Salesforce, Yandex

Medium
Software Engineer

Longest Window Whose Largest Pair Difference Meets a Limit

Problem Return the length of the longest nonempty contiguous subarray of nums in which every pair of values differs in absolute value by at most limit...

Coding & AlgorithmsTwo Pointers & Sliding WindowStacks & Queues
0
0
7 people solved
Google logo
GoogleAmazonMicrosoftSprinklr

Also asked at Microsoft, Sprinklr

Medium
Software Engineer

Shortest Directed Routes With Alternating Edge Colors

Problem A directed graph on nodes 0 through n-1 has redEdges and blueEdges. Self-loops and parallel edges are allowed. For every node, return the smal...

Coding & AlgorithmsGraphsStacks & Queues
1
0
13 people solved
Decagon logo
Decagon
Medium
Software Engineer

Compute exclusive CPU time from nested logs

You are given logs from a single-threaded CPU that runs n functions (IDs 0 to n-1). Each log entry is a string in the format: - "functionId:start:time...

Coding & AlgorithmsStacks & Queues
22
0
389 people solved
Mar 1, 2026
Google logo
GoogleMetaMicrosoft

Also asked at Microsoft, Bloomberg, Amazon

Medium
Software Engineer

Fewest Insertions When Each Opening Requires a Consecutive Closing Pair

Problem A balanced string is empty,a concatenation of balanced strings,or "("+A+"))" for balanced A. Thus each opening parenthesis must be matched by ...

Coding & AlgorithmsGreedyStacks & Queues
0
0
10 people solved
Microsoft logo
MicrosoftGoogleMeta

Also asked at Meta, Bloomberg, Aqr

Medium
Software Engineer

Maximize the Score of Bounded Forward Jumps

Problem Start at index 0 of nums and finish at its final index. Each jump advances between 1 and k positions without leaving the array. Your score inc...

Coding & AlgorithmsDynamic ProgrammingStacks & Queues
0
0
10 people solved
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Meta, Bloomberg, Flipkart, Sprinklr, Avito, Morgan Stanley, ZS Associates, TikTok, Accenture

Medium
Software Engineer

Sum the Minimum Value of Every Contiguous Subarray

Problem For every nonempty contiguous subarray of arr, take its minimum. Return the sum of those minimums modulo 10^9+7. `cpp class Solution { public:...

Coding & AlgorithmsStacks & QueuesArrays & Strings
1
0
9 people solved
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Design an Editable Text Buffer

This question evaluates data structure design, mutable state management, undo/redo semantics, and prefix-based autocomplete indexing with dynamic freq...

Coding & AlgorithmsData Structure DesignStacks & Queues
33
0
249 people solved
Mar 11, 2026
Amazon logo
AmazonBloombergGoogle

Also asked at Google, Microsoft, Meta, ByteDance, TikTok, Flipkart

Medium
Software Engineer

Measure Binary-Tree Width Including Internal Null Gaps

Problem Return the greatest width among levels of root. A level's width counts complete-tree slots from its leftmost nonnull node through its rightmos...

Coding & AlgorithmsTreesStacks & Queues
1
0
8 people solved
Meta logo
Meta
Easy
Software EngineerSenior+ Locked

Design a String Calculator with Explicit Grammar and Evaluation Rules

Design a string calculator by clarifying expression grammar, tokenization, precedence, grouping, numerical semantics, and conditional parsing strategi...

Software Engineering FundamentalsParsing & Interpreters
1
0
33 people solved
Aug 29, 2026
Optiver logo
Optiver
Medium
Software Engineer

Design a queue and analyze tradeoffs

Design a FIFO queue data structure that supports enqueue, dequeue, peek, and isEmpty. Compare implementations using a singly linked list, a dynamic ar...

Coding & AlgorithmsData Structure Design
62
0
521 people solved
Sep 6, 2025
Plaid logo
Plaid
Medium
Software Engineer

Compute discounted prices in a queue

Given an integer array prices where prices[i] is the price of the i-th item in a checkout line, apply the following rule: for each i, find the first j...

Coding & AlgorithmsStacks & Queues
39
0
568 people solved
Sep 6, 2025
Bloomberg logo
BloombergMicrosoftRippling

Also asked at Rippling, Expedia, Visa, Amazon, Deshaw, Salesforce, Meta, Tower

Medium
Software Engineer

Print the Smallest String through a Last-In-First-Out Robot Buffer

Problem Start with input s, an empty robot buffer t, and empty paper. You may move the first remaining input character to the end of t, or remove the ...

Coding & AlgorithmsStacks & QueuesGreedy
1
0
13 people solved
Amazon logo
Amazon
Hard
Software Engineer Locked

Lowest Common Ancestor in a Binary Search Tree

Find the lowest common ancestor of two nodes in a binary search tree, with a precise level-order input format and ancestor-as-target edge semantics.

Coding & AlgorithmsTrees
7
0
74 people solved
Aug 22, 2026
Amazon logo
Amazon
Easy
Software Engineer Locked

Validate Properly Nested Brackets

Determine whether a string of round, square, and curly brackets is properly matched and nested in last-opened, first-closed order, treating the empty ...

Coding & AlgorithmsStacks & Queues
18
1
248 people solved
Aug 19, 2026
Roblox logo
Roblox
Medium
Software Engineer

Find most frequent call stack from logs

Given an array of log entries for a single-threaded program's function calls, each entry is either '->Name' (function entry) or '<-Name' (function exi...

Coding & AlgorithmsStacks & Queues
117
1
1067 people solved
Aug 11, 2025
Roblox logo
Roblox
Easy
Machine Learning Engineer

Implement recent-requests counter

You are designing an in-memory component for a web service that needs to track how many requests ("hits") it has received in the last 5 minutes. Imple...

Coding & AlgorithmsData Structure DesignStacks & Queues
21
0
198 people solved
Dec 8, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Evaluate an Arithmetic Expression with Parentheses, Unary Minus and Four Operators

Evaluate an arithmetic expression given as a string and return its integer value. This covers the whole reported calculator series: addition and subtr...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
4
0
32 people solved
Apr 28, 2026
Easy
Software EngineerNew Grad Locked

Validate Nested Parentheses, Brackets, and Braces

Validate nested parentheses, brackets, and braces with correct handling of empty input, mismatched closing symbols, and unfinished groups.

Coding & AlgorithmsStacks & QueuesArrays & Strings
3
0
28 people solved
Aug 31, 2026
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