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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
Amazon logo
Amazon
Hard
Software Engineer

Design a keyboard and mouse input system

Question Design an input processing system that captures keyboard and mouse events and can reliably reconstruct what the user typed (answering "what d...

System DesignSystem Design FundamentalsArrays & Strings
12
0
117 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Identify members lacking specialty coverage

Identify members lacking specialty coverage Oscar wants to ensure that every insurance member has adequate access to in-network healthcare providers w...

Coding & AlgorithmsArrays & Strings
15
0
107 people solved
Jul 28, 2025
SoFi logo
SoFi
Medium
Software Engineer

Find the second most frequent tag

You are given a list of strings in the following repeating order: [id1, name1, tag1, id2, name2, tag2, ...] So every 3 consecutive elements describe o...

Coding & AlgorithmsArrays & Strings
17
0
137 people solved
Feb 4, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Validate whether brackets are properly nested

This question evaluates proficiency in sequence validation, paired-token matching, and the use of data structures to manage nested elements within str...

Coding & AlgorithmsStacks & Queues
15
0
117 people solved
Jan 6, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Implement polynomial multiplication API in C

This question evaluates proficiency in C programming, API design, low-level data representation for polynomials, and algorithmic competence in perform...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
11
0
101 people solved
Feb 8, 2026
Capital One logo
Capital One
Medium
Machine Learning Engineer

Maximize grid-path expression and count sawtooth subarrays

Problem 1: Maximize a valid expression along a grid path You are given an m x n grid grid. Each cell contains either: - an operator: '+' or '-', or - ...

Coding & AlgorithmsGrids & MatricesArrays & Strings
21
0
156 people solved
Oct 13, 2025
Capital One logo
Capital One
Hard
Data Scientist

Find lexicographically smallest string and elimination order

You remember two coding questions from an online assessment. Question 1: Return the lexicographically smallest string after a prefix/suffix reverse Yo...

Coding & AlgorithmsArrays & StringsSimulation & State Machines
14
0
106 people solved
Sep 25, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Validate a JSON-like string

This question evaluates parsing and string-processing skills, focusing on structural validation of JSON-like text including matching and nesting of br...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
11
0
158 people solved
Jan 6, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Implement dasher active-time calculator

Implement a function that, given a dasherId, a local pay-period interval [startLocalDateTime, endLocalDateTime), and a list of order events of the for...

Coding & Algorithms
42
0
417 people solved
Sep 6, 2025
Apple logo
Apple
Hard
Software Engineer Locked

Count subarrays with sum equals k

This question evaluates a candidate's competency in array algorithms and reasoning about contiguous subarray sums, including correct handling of negat...

Coding & AlgorithmsArrays & Strings
26
0
196 people solved
Feb 11, 2026
Oracle logo
Oracle
Medium
Software Engineer

Solve three DSA problems: trie, window, intervals

1) Design and implement an autocomplete service. Support insert(word) to add a word and suggest(prefix) to return up to five existing words that start...

Coding & AlgorithmsString AlgorithmsIntervals & Scheduling
6
0
104 people solved
Sep 6, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Solve common string/tree/grid interview tasks

This problem set evaluates practical coding competencies including string parsing and sign handling, positional and frequency-based matching for feedb...

Coding & AlgorithmsArrays & StringsTrees
14
0
106 people solved
Feb 12, 2026
Grammarly logo
Grammarly
Hard
Software Engineer

Solve interval merge and string dedup problems

You are given three coding questions from a phone screen. Solve each independently. 1) Merge overlapping intervals Input: A list of intervals interval...

Coding & AlgorithmsStacks & QueuesIntervals & Scheduling
46
0
321 people solved
Oct 22, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Solve three scheduling and array problems

In this round you are given three separate coding problems to solve. --- Problem 1: Schedule tasks with cooldown You are given: - A list of tasks, whe...

Coding & AlgorithmsHeaps & Priority QueuesTwo Pointers & Sliding Window
22
0
167 people solved
Oct 28, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Find max equal-frequency block count for each prefix

This question evaluates proficiency in string processing, frequency-vector reasoning, and prefix-based partitioning to determine equal-frequency conti...

Coding & AlgorithmsArrays & Strings
27
0
226 people solved
Feb 12, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Solve three coding tasks from onsite

This set of tasks evaluates array-based greedy reasoning for circular route feasibility, stack-based parsing for bracket matching, and grid/graph reac...

Coding & AlgorithmsGreedyGrids & Matrices
14
0
155 people solved
Feb 11, 2026
Meta logo
Meta
Medium
Software EngineerSenior+ Locked

Solve string transform and min-move sorting

This two-part problem evaluates string manipulation and algorithmic problem-solving competencies, specifically rule-based text transformation and comp...

Coding & AlgorithmsArrays & StringsSorting
7
0
110 people solved
Jan 22, 2026
J.P. Morgan logo
J.P. Morgan
Easy
Software Engineer Locked

Design an autocomplete suggestions API

This question evaluates understanding of string-oriented data structures (e.g., prefix trees/tries), ranked retrieval and dynamic updates, testing ski...

Coding & AlgorithmsTrees
10
0
86 people solved
Jan 22, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Implement a Tic-Tac-Toe game class

Problem Implement a class that supports playing an n × n Tic-Tac-Toe game. Requirements Create a class TicTacToe(n) with: - move(row, col, player) -> ...

Coding & AlgorithmsData Structure DesignSimulation & State Machines
10
0
106 people solved
Oct 14, 2025
Citadel logo
Citadel
Medium
Software Engineer Locked

Design a token manager with lazy expiration

This question evaluates time-based data structure design and algorithmic reasoning for managing expiring items, focusing on hashing, timestamp orderin...

Coding & AlgorithmsData Structure DesignArrays & Strings
15
0
130 people solved
Jan 9, 2026
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