Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

435

Companies

980

Updated

11.12.2026

435 Questions 980 Companies11.12.2026

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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Medium

Software EngineerSenior+

Design Keyword Search over Posts with Exclusions and Frequency Ranking

Design the search backend for posts on a social platform. A user types one or more keywords and gets back the posts that match, best matches first. De...

System DesignSearch & Feed SystemsPartitioning & Consistent Hashing

Rearrange an Array to Alternate Largest and Smallest Remaining Values

Given a list of integers, rearrange its elements so that they alternate between the extremes of what is left: the first element is the largest value, ...

Coding & AlgorithmsSorting

Software Engineer Locked

Aggregate Recent Message Events And Active Chats

Prepare for a stateful event aggregation coding prompt over chat events and active chats in a rolling five-minute window. The question is useful for d...

Coding & AlgorithmsData Structure Design

Move Zeros In Place while Preserving Nonzero Order

Problem Modify nums so all nonzero values stay in their original relative order and all zeros follow them. Do this in place without copying the array....

Coding & AlgorithmsTwo Pointers & Sliding Window

16 people solved

Easy

Software EngineerIntern Locked

Fewest Days to Read a Book When Chapters Cannot Be Split Across Days

Given the reading time available on each day and the time each chapter of a book takes, find the fewest days needed to read every chapter in order whe...

Coding & AlgorithmsGreedy

93 people solved

Sep 6, 2026

AmazonIBMGoldman Sachs

Medium

Software Engineer

Count Palindrome Occurrences among Contiguous Substrings

Problem Return the number of nonempty contiguous substrings of s that read the same forward and backward. Different start/end ranges count separately ...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

24 people solved

AmazonGoogleBloomberg

Hard

Software Engineer

Measure Rainwater Held Between Bars

Problem The array heights describes a row of adjacent vertical bars on level ground. Bar i has height heights[i], and every bar is one unit wide. Retu...

Coding & AlgorithmsTwo Pointers & Sliding WindowDynamic Programming

13 people solved

GoogleNetflixMicrosoft

Hard

Software Engineer

Detect a Bounded-Index Pair with Near-Equal Values

Problem Return whether there are distinct indices i,j satisfying both abs(i-j) <= indexDiff and abs(nums[i]-nums[j]) <= valueDiff. Either equality or ...

Coding & AlgorithmsTwo Pointers & Sliding WindowTrees

15 people solved

Waymo

Medium

Software Engineer Locked

Does a Seven-Segment LED Digit Display Read the Same Rotated 180 Degrees?

Decide whether a row of digits on a seven-segment LED display reads the same after the whole display is rotated by 180 degrees. Tests modeling each di...

Coding & AlgorithmsArrays & Strings

In-Memory Per-Second API Rate Limiter: Accept or Reject Each Request

An API endpoint is protected by an in-memory rate limiter. The limiter is created with one value, max_per_second, the largest number of requests it le...

Coding & AlgorithmsRate LimitingData Structure Design

71 people solved

Jul 14, 2026

AmazonGoogleMicrosoft

Medium

Software Engineer

Arrange Three Encoded Colors without Library Sorting

Problem The entries of nums encode three colors as 0, 1, and 2. Rearrange the supplied array in place so all 0s come first, followed by all 1s, then a...

Coding & AlgorithmsSortingTwo Pointers & Sliding Window

12 people solved

Confluent

Medium

Software EngineerSenior+

Document Search: Exact Word Match, Non-Adjacent Phrase Match and AND/OR Queries

You are given a collection of documents, each with an integer id and its text. Build a search component over them. The interviewer adds requirements o...

Software Engineering FundamentalsData Structure DesignParsing & Interpreters

Data Scientist Locked

Minimum Character Replacements So No Two Adjacent Characters Are Equal

Given a string of lowercase letters, find the minimum number of single-position replacements needed so that no two adjacent characters are equal. It t...

Coding & AlgorithmsGreedyArrays & Strings

Software Engineer Locked

Maximize Equal Array Length After Contiguous Sum Merges

Find the maximum length of equal arrays obtainable by merging adjacent positive values into their sums, or report that equality is impossible.

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Detect Equal Values within an Index Radius

Problem Return whether two different array positions hold equal values and are at most k indices apart. Both value equality and the index-distance bou...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window

15 people solved

BloombergStripeAmazon

Medium

Software Engineer

Transactions Flagged by Amount or Cross-City Timing

Problem Each transaction string has the form name,time,amount,city. Flag a transaction if its amount exceeds 1000 dollars, or if another transaction w...

Coding & AlgorithmsArrays & StringsParsing & Interpreters

Solve 15 common Apple coding questions

The post summarizes high-frequency coding problems reported for Apple Software Engineer interviews. Practice the following algorithm and data-structur...

Coding & AlgorithmsTwo Pointers & Sliding Window

Reverse Only Vowel Occurrences in an ASCII String

Problem Reverse the sequence of vowels in s while leaving every nonvowel position unchanged. Vowels are a,e,i,o,u in either case; move each vowel's ac...

Coding & AlgorithmsTwo Pointers & Sliding Window

17 people solved

Medium

Software EngineerSenior+

Find the K Values Closest to a Target in a Binary Search Tree

A binary search tree holds distinct integer values: for every node, every value in its left subtree is smaller than the node's value and every value i...

Coding & AlgorithmsTrees

Find the Shortest Substring Covering Required Characters

Problem Find the shortest contiguous substring of text that contains every character required by needed, respecting how many times each character occu...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

13 people solved

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Tech Interview Questions

Design Keyword Search over Posts with Exclusions and Frequency Ranking

Rearrange an Array to Alternate Largest and Smallest Remaining Values

Aggregate Recent Message Events And Active Chats

Move Zeros In Place while Preserving Nonzero Order

Fewest Days to Read a Book When Chapters Cannot Be Split Across Days

Count Palindrome Occurrences among Contiguous Substrings

Measure Rainwater Held Between Bars

Detect a Bounded-Index Pair with Near-Equal Values

Does a Seven-Segment LED Digit Display Read the Same Rotated 180 Degrees?

In-Memory Per-Second API Rate Limiter: Accept or Reject Each Request

Arrange Three Encoded Colors without Library Sorting

Document Search: Exact Word Match, Non-Adjacent Phrase Match and AND/OR Queries

Minimum Character Replacements So No Two Adjacent Characters Are Equal

Maximize Equal Array Length After Contiguous Sum Merges

Detect Equal Values within an Index Radius

Transactions Flagged by Amount or Cross-City Timing

Solve 15 common Apple coding questions

Reverse Only Vowel Occurrences in an ASCII String

Find the K Values Closest to a Target in a Binary Search Tree

Find the Shortest Substring Covering Required Characters

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