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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
Figma logo
Figma
Easy
Software Engineer Locked

Implement Memory-Efficient Document Undo/Redo

This question evaluates data structure design and algorithmic reasoning for implementing memory-efficient undo/redo semantics on a key-value document,...

Coding & AlgorithmsData Structure DesignArrays & Strings
26
0
199 people solved
Jan 12, 2026
Google logo
GoogleBloombergMicrosoftAmazon

Also asked at Microsoft, Amazon

Easy
Software Engineer

Count Distinct Three-Digit Even Numbers

Problem You are given an array digits containing decimal digits. Return the number of distinct three-digit even integers that can be formed from the a...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
0
0
6 people solved
Meta logo
Meta
Medium
Software Engineer Locked

Design Boolean Search over User Status Posts

Design a Boolean search service for status posts using normalized tokens and an inverted index. Cover deterministic AND/OR evaluation, asynchronous fr...

System DesignSearch & Feed SystemsStorage & Sharding
17
0
306 people solved
Aug 8, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer Locked

Return the First Non-Repeating Character

Return the first character whose total frequency is one, preserving input order and defining the result when every character repeats.

Coding & AlgorithmsArrays & Strings
14
0
104 people solved
Sep 1, 2026
Google logo
GoogleAmazonMeta
Hard
Software Engineer

Sum the Block Lengths That Permit Sorting by Rotation

Sum the Block Lengths That Permit Sorting by Rotation You are given an integer array nums of length n. A positive integer k is valid if k divides n an...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
7 people solved
Faire logo
Faire
Medium
Software Engineer

Find first 5-7-5 haiku in sentence

Find first 5-7-5 haiku in sentence Given a sentence containing mixed case and punctuation, and a syllable dictionary mapping lowercase words to their ...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
44
0
338 people solved
Jul 28, 2025
Tesla logo
Tesla
Hard
Machine Learning Engineer

Compute suffix sums over waypoints

Problem You are given a batch of 2D waypoint trajectories. - Input: points with shape [B, N, 2], where points[b][i] = (x, y) is the i-th waypoint for ...

Coding & AlgorithmsArrays & Strings
11
0
203 people solved
Feb 12, 2026
Amazon logo
AmazonGoogle
Medium
Software Engineer

Find the First Paint Step Completing a Row or Column

Find the First Paint Step Completing a Row or Column You are given a zero-indexed integer array arr and an m by n integer matrix mat. Each contains ev...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
0
0
9 people solved
Apple logo
Apple
Easy
Data Engineer

Implement most_frequent_key without using max()

Problem (Python OOP) You are given two classes. Parent precomputes frequency counts of items (as strings) from an input list. `python class Parent: ...

Coding & AlgorithmsArrays & StringsProgramming Languages
18
0
153 people solved
Nov 16, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Apply sliding window techniques

Apply sliding window techniques Explain the sliding window technique and apply it to solve: ( 1) Given an array of positive integers and a target S, r...

Coding & AlgorithmsTwo Pointers & Sliding Window
18
0
189 people solved
Aug 7, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Set second tree values by subtree sums

Given the roots of two complete binary trees T1 and T2 that have identical structure and the same number of nodes, replace each value in T2 with the s...

Coding & AlgorithmsTrees
20
1
159 people solved
Sep 6, 2025
Amazon logo
AmazonGoogle
Medium
Software Engineer

Minimum Swaps for Digit-Sum Order

Minimum Swaps for Digit-Sum Order You are given an array nums of distinct positive integers. Its required order is increasing decimal digit sum. When ...

Coding & AlgorithmsSortingArrays & Strings
0
0
6 people solved
Google logo
Google
Medium
Software Engineer

Return dictionary words matching a prefix

You are given a list of strings words (a dictionary) and a string prefix. Return all words in words that start with prefix. Clarifications/constraints...

Coding & Algorithms
39
0
280 people solved
Mar 9, 2026
Amazon logo
AmazonGoogleBloomberg

Also asked at Bloomberg, Meta, Microsoft

Medium
Software Engineer

Count Subarrays with at Least k Occurrences of the Global Maximum

Count Subarrays with at Least k Occurrences of the Global Maximum You are given an integer array nums and a positive integer k. Let M be the maximum v...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
0
0
11 people solved
Amazon logo
AmazonMetaGoogle

Also asked at Google, Bloomberg, TCS

Easy
Software Engineer

Choose a Maximum-Sum Ordered Subsequence

Problem Return a subsequence of nums containing exactly k entries with the greatest possible sum. A subsequence keeps the selected entries in their or...

Coding & AlgorithmsSortingGreedy
0
0
7 people solved
Box logo
Box
Medium
Software Engineer

Compute Top-K word frequencies under a path

Compute Top-K word frequencies under a path Given a filesystem path that may contain nested subdirectories and files, compute the top K most frequent ...

Coding & AlgorithmsHeaps & Priority QueuesBatch & Stream Processing
38
0
266 people solved
Aug 1, 2025
Agoda logo
Agoda
Medium
Software Engineer

Find two numbers that sum to a target

Array sum lookup Given an integer array nums and an integer target, find two distinct indices i and j such that: - nums[i] + nums[j] == target - i != ...

Coding & AlgorithmsArrays & Strings
13
0
115 people solved
Dec 14, 2025
Google logo
GoogleTCSAmazon

Also asked at Amazon, Meta, Bloomberg

Easy
Software Engineer

Missing Values Inside a Retained Range

Problem An integer array nums contains distinct values left over from an original inclusive range of consecutive integers. Some values may be missing,...

Coding & AlgorithmsArrays & Strings
0
0
6 people solved
Figma logo
Figma
Medium
Data Engineer

Validate an IPv4 address string

Given a string s, determine whether it is a valid IPv4 address. A valid IPv4 address: - Has exactly 4 parts separated by dots (.): x1.x2.x3.x4 - Each ...

Coding & AlgorithmsArrays & Strings
23
0
263 people solved
Jan 20, 2026
TCS logo
TCS
Medium
Data Scientist

Find duplicates in a list efficiently

Given a Python list that can contain integers (possibly negative) and may be very large, write code and explain approaches to find all values that app...

Coding & AlgorithmsArrays & Strings
35
0
344 people solved
Oct 13, 2025
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