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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
1.5k
Companies
980
Updated
11.12.2026
1.5k 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
Glean logo
Glean
Medium
Software Engineer

Implement a Byte-Pair Encoding Tokenizer: Threshold Training, Encode and Decode

Implement a byte-pair encoding (BPE) tokenizer from scratch with three functions: - train(text: str, threshold: int) learns merge rules from text. - e...

Software Engineering FundamentalsArrays & StringsTransformers & Attention
3
0
67 people solved
Sep 30, 2026
Citadel logo
Citadel
Medium
Software EngineerIntern Locked

Order Book With Per-Exchange BBO and Cross-Exchange NBBO Queries

Design and implement an in-memory order book that aggregates quantity by exchange, side and price, and answers per-exchange best bid and offer and cro...

Software Engineering FundamentalsData Structure DesignHeaps & Priority Queues
27
1
312 people solved
Sep 10, 2026
Discord logo
Discord
Medium
Data ScientistSenior+

Return Words Present in Exactly One Message

Return Words Present in Exactly One Message Implement unique_string(msg1, msg2). Given two message strings, return a list of words that appear in exac...

Coding & AlgorithmsArrays & Strings
4
0
79 people solved
Sep 26, 2026
Lyft logo
Lyft
Medium
Software Engineer

Implement Smartphone-Keyboard-Style Word Autocompletion from Sample Text

Implement a program that performs simple autocompletion, similar to the kind used on a smartphone keyboard: as the user types the beginning of a word,...

Software Engineering FundamentalsData Structure DesignTrees
0
0
8 people solved
Oct 25, 2026
Crowdstrike logo
Crowdstrike
Medium
Software Engineer

Filter Products by Optional Category and Price Criteria Combined with AND or OR

A catalog page lets a user narrow a pool of products with one filtering rule. Implement a lightweight filter that applies a single rule, with an opera...

Software Engineering FundamentalsLow-Level Design (OOP)Testing & Quality
1
0
17 people solved
Oct 10, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Streaming Top-K Frequent Elements with O(1) Updates Instead of a Heap

Design a structure that consumes an unbounded stream and reports the K most frequent elements at any time, first with a heap and then with constant-ti...

Software Engineering FundamentalsData Structure DesignHeaps & Priority Queues
11
0
107 people solved
Sep 15, 2026
Salesforce logo
Salesforce
Medium
Software EngineerSenior+ Locked

Fewest Repeat-Free Pieces After Deleting Every Copy of One Letter

A string problem: delete every occurrence of one chosen lowercase letter, then split what remains into the fewest contiguous pieces with no repeated l...

Coding & AlgorithmsGreedyArrays & Strings
13
0
94 people solved
Sep 22, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Most Frequent Substring Under Distinct-Letter and Length Limits

Given a lowercase string s, consider only the substrings that satisfy two limits, and return how many times the most frequent of them occurs in s. A s...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
21
0
151 people solved
Sep 7, 2026
ByteDance logo
ByteDance
Hard
Software Engineer

Sparse Matrix Multiplication from Coordinate Lists

Implement sparse matrix multiplication from scratch. Matrix A has n rows and m columns, matrix B has m rows and p columns, and most entries of both ar...

Coding & AlgorithmsGrids & MatricesArrays & Strings
4
0
29 people solved
Oct 13, 2026
Visa logo
Visa
Medium
Software EngineerSenior+

Earliest K-Minute Meeting Start from Text Schedules with Inclusive Busy Times

Everyone listed in a set of schedules must attend one meeting of k minutes. Each schedule entry is a string with four space-separated fields, a person...

Coding & AlgorithmsIntervals & Scheduling
4
0
65 people solved
Oct 2, 2026
Cresta logo
Cresta
Medium
Software Engineer

Decode a Message of Letter-Scrambled Words Against a Known Word List

A message was encoded word by word: the letters inside each word were rearranged, while the order of the words and the single spaces between them were...

Coding & AlgorithmsArrays & Strings
7
0
70 people solved
Oct 6, 2026
Amazon logo
AmazonMetaBloomberg

Also asked at Bloomberg, Google, Microsoft, Infosys, Accenture, TCS, Adobe, Oracle, DoorDash, Walmart Labs, IBM, Flipkart, Uber, Rubrik, Meesho

Medium
Software Engineer

Advance an Array to Its Next Lexicographic Order

Problem Rearrange the integer array nums in place into the next lexicographically greater arrangement of its values. If no greater arrangement exists,...

Coding & AlgorithmsArrays & StringsGreedy
1
0
25 people solved
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer

Choose a bit string with at most maxSet ones to maximize its XOR with x

You are given a binary string x of length bits, written with the most significant bit first, and an integer maxSet. Construct a binary string y of the...

Coding & AlgorithmsBit ManipulationGreedy
8
1
78 people solved
Oct 6, 2026
Citadel logo
Citadel
Medium
Software EngineerIntern Locked

Merge K Timestamp-Sorted Price Feeds into a Running Absolute Price

Merge K price-event feeds, each already sorted by timestamp, into one chronological stream and return the running absolute price after every event, st...

Coding & AlgorithmsHeaps & Priority Queues
36
0
347 people solved
Sep 20, 2026
Google logo
Google
Medium
Software Engineer

O(1) Range Queries: Are All Elements of a Subarray Distinct?

You are given an integer array nums and a range [l, r] of indices. Determine whether the elements nums[l], nums[l + 1], ..., nums[r] are all distinct,...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
26
1
207 people solved
Sep 17, 2026
Capital One logo
Capital One
Medium
Software EngineerNew Grad

Count Subarrays Whose Step-by-Step Changes Match an Up, Flat, Down Pattern

You are given an integer array nums of length n and an array pattern of length m whose values are each -1, 0 or 1. Each pattern value describes the re...

Coding & AlgorithmsArrays & Strings
14
0
176 people solved
Sep 27, 2026
Amazon logo
Amazon
Medium
Software EngineerIntern

Max Consecutive Uptime After Repairing One Window of Exactly k Log Entries

A server's health log is a string of 0s and 1s, one character per time step: 1 means the server was up and running normally, and 0 means it had failed...

Coding & AlgorithmsTwo Pointers & Sliding Window
2
0
14 people solved
Oct 29, 2026
Capital One logo
Capital One
Hard
Software Engineer

Count Subarrays Containing at Least k Disjoint Pairs of Equal Values

Fruits travel along a conveyor belt, and fruits[i] is the type of the i-th fruit, written as an integer. For a contiguous segment of the belt, a pair ...

Coding & AlgorithmsTwo Pointers & Sliding Window
19
0
157 people solved
Sep 10, 2026
Ramp logo
Ramp
Easy
Frontend Engineer

Build a Wordle Guess Checker with Green, Yellow and Red Letter Feedback

Build a small version of the classic Wordle word game as a browser component. A fixed secret word is checked against what the user types, and each typ...

Software Engineering FundamentalsUI Components & AccessibilityArrays & Strings
8
0
116 people solved
Sep 17, 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
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