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

"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

Waymo

Medium

Software Engineer Locked

Serialize Expression Tree Minimizing Parentheses

This question evaluates proficiency with binary expression trees, operator precedence and associativity, and the ability to serialize an abstract synt...

Coding & AlgorithmsParsing & InterpretersTrees

111 people solved

Feb 25, 2026

Write queries for follows and bookings

This question evaluates the ability to manipulate temporal event logs, enforce bidirectional relational integrity, and implement efficient graph and i...

Coding & AlgorithmsSQLIntervals & Scheduling

Match Two Strings with Exactly One Distinct-Index Swap

Problem Return whether swapping the characters at exactly two different indices of s can make it equal to goal. Even when the strings already match, a...

Coding & AlgorithmsArrays & Strings

Remove as Many Target-Sum Pairs as Possible

Problem One operation removes two distinct occurrences from nums whose values sum to k. Each occurrence can be removed only once. Return the maximum n...

Coding & AlgorithmsArrays & Strings

Word Compression Algorithm

Algorithm Prompt: String Compression and Decompression with Run-Length Encoding Design algorithms to compress and decompress a string using run-length...

Product / Decision MakingArrays & StringsParsing & Interpreters

Solve Balanced Permutations and Tree Reversals

You have 90 minutes to solve the following two independent coding problems. Problem 1: Balanced Prefix Values in a Permutation You are given a permuta...

Coding & AlgorithmsTreesArrays & Strings

Software EngineerNew Grad

Largest Number From a 1-and-2 Digit String With Even Counts of Each Digit

You are given a string digits consisting only of the characters '1' and '2'; it represents a positive integer. You may delete zero or more characters ...

Coding & AlgorithmsGreedyArrays & Strings

Machine Learning EngineerSenior+

Build a concurrent site crawler

Implement a small crawler in Python for a single target website. Requirements: - Input: a start URL, a maximum crawl depth, and an output CSV path. - ...

Coding & AlgorithmsConcurrencyAPI Integration & HTTP Clients

Find the Smallest Stable Index I

Find the Smallest Stable Index I You are given an integer array nums of length n and an integer k. For each zero-based index i, define its instability...

Coding & AlgorithmsArrays & Strings

7 people solved

Netflix

Medium

Software Engineer Locked

Find longest run of identical consecutive shows

This question evaluates array-manipulation skills and the ability to identify contiguous runs of equal values, emphasizing algorithmic efficiency and ...

Coding & AlgorithmsArrays & Strings

Compute a Global Mode Across Distributed Partitions

Compute the mode of data partitioned across several workers using supplied send/receive-style communication primitives. Explain the protocol and how y...

Software Engineering FundamentalsBatch & Stream ProcessingPartitioning & Consistent Hashing

Select the best dasher for an order

You need to assign an order to a dasher. Input: - An order with a pickup location (x, y). - A list of dashers, each with: - id - current location ...

Coding & Algorithms

288 people solved

Jan 14, 2026

AmazonGoogleMicrosoftBloomberg

Easy

Software Engineer

Reverse Through the First Matching Character

Problem Reverse the prefix of word from index 0 through the first occurrence of ch, including that occurrence. Leave every later character unchanged. ...

Coding & AlgorithmsArrays & Strings

Count Arrays with Zigzag Comparisons

Problem Given integers n, l, and r, count arrays of length n satisfying all three conditions: - Every element is an integer in the inclusive range [l,...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings

10 people solved

GrammarlyMorgan Stanley

Medium

Software Engineer

Fewest Substrings with Equal Character Frequencies

Fewest Substrings with Equal Character Frequencies You are given a lowercase English string s. Partition the entire string into one or more nonempty, ...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings

Return Absolute Differences of Strictly Left and Right Sums

Problem For each index i in nums, sum entries strictly to its left and strictly to its right, using 0 for an empty side. Return the absolute differenc...

Coding & AlgorithmsArrays & Strings

Add, Remove, and Find Values in a Bounded Integer Universe

Implement a set that supports adding, removing, and searching integer values from a known bounded range. Implement bounded_set(limit: int, operations:...

Coding & AlgorithmsData Structure DesignArrays & Strings

Find word sequence with 1–2 char changes

Given a beginWord, an endWord, and a dictionary (wordList) of unique same-length lowercase words, determine whether there exists a transformation sequ...

Coding & AlgorithmsGraphs

Compute minimum time with task cooldowns

You are given a multiset of task types represented by uppercase letters (e.g., A, A, A, B, B, C). Each task takes exactly 1 time unit to execute. Runn...

Coding & AlgorithmsGreedy

Find a Character in the Growing Alphabet String

Problem Start with word = "a". In each operation, make a new string by replacing every character of the current word with the next lowercase English l...

Coding & AlgorithmsSimulation & State MachinesArrays & Strings

9 people solved

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Tech Interview Questions

Serialize Expression Tree Minimizing Parentheses

Write queries for follows and bookings

Match Two Strings with Exactly One Distinct-Index Swap

Remove as Many Target-Sum Pairs as Possible

Word Compression Algorithm

Solve Balanced Permutations and Tree Reversals

Largest Number From a 1-and-2 Digit String With Even Counts of Each Digit

Build a concurrent site crawler

Find the Smallest Stable Index I

Find longest run of identical consecutive shows

Compute a Global Mode Across Distributed Partitions

Select the best dasher for an order

Reverse Through the First Matching Character

Count Arrays with Zigzag Comparisons

Fewest Substrings with Equal Character Frequencies

Return Absolute Differences of Strictly Left and Right Sums

Add, Remove, and Find Values in a Bounded Integer Universe

Find word sequence with 1–2 char changes

Compute minimum time with task cooldowns

Find a Character in the Growing Alphabet String

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