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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k 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
Whatnot logo
Whatnot
Easy
Software Engineer

Check Whether a String Can Become a Palindrome by Deleting at Most One Character

Given a string s, return True if s can be made into a palindrome by deleting at most one character, and False otherwise. A palindrome reads the same f...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
5
0
92 people solved
Oct 10, 2026
Google logo
Google
Easy
Software EngineerIntern

Evenings Needed to Read Chapters in Order Under Nightly Time Budgets

A book has M chapters that must be read in order, from the first chapter to the last, without skipping any. Reading chapter K takes chapter[K] minutes...

Coding & AlgorithmsSimulation & State Machines
1
0
26 people solved
Oct 26, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Design an LLM Agent System That Revises a Contract to Comply with Dozens of Rules

Design an LLM agent system that revises a given contract so it complies with several dozen given legal rules. It tests decomposing work across model c...

ML System DesignSystem Design FundamentalsAI Agents
11
0
135 people solved
Sep 22, 2026
Google logo
Google
Medium
Software EngineerSenior+

Successful Project, Teammate Conflict, a Changed View of a Teammate, and Values You Seek

This behavioral round for a senior software engineer asked four questions: two common ones (a successful project and a conflict with teammates) and tw...

Behavioral & LeadershipConflict & CollaborationMotivation & Fit
14
0
103 people solved
Oct 6, 2026
Confluent logo
Confluent
Easy
Software EngineerNew Grad

Total Per-Letter Counts from an Encoded String with Multi-Digit Numbers

A string encodes counts in a fixed format: a lowercase letter followed by a decimal number, repeated. The same letter may appear more than once. Add u...

Coding & AlgorithmsArrays & Strings
0
0
12 people solved
Nov 5, 2026
Rippling logo
Rippling
Medium
Software EngineerSenior+

Do You Prefer Building from Scratch or Joining a Mature Team?

Would you rather join a team building a product from the beginning or a team working on a mature product? Explain your preference, the tradeoffs you s...

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making
1
0
14 people solved
Nov 3, 2026
Capital One logo
Capital One
Medium
Software EngineerSenior+ Locked

Analyze and Debug Virtual-Card Payment Rules

Analyze virtual-card benefits and challenges, explain payment-rule decisions, and debug Boolean logic, threshold boundaries, and decimal digit parsing...

Software Engineering FundamentalsPayments & LedgersDebugging
50
0
486 people solved
Aug 23, 2026
Google logo
GoogleMetaBloomberg

Also asked at Bloomberg, Amazon, Microsoft, Oracle, Josh Technology

Medium
Software Engineer

Flatten Existing Tree Nodes into a Preorder Right Chain

Problem Flatten a binary tree into its preorder node sequence using the same existing TreeNode objects. After the call, every left pointer must be nul...

Coding & AlgorithmsTrees
4
0
33 people solved
Amazon logo
Amazon
Hard
Software Engineer

Maximize the Bitwise AND of K Elements After Spending an Increment Budget

You are given an array arr of non-negative integers, an integer k and a non-negative integer budget c. First, you may increase elements of arr. Each i...

Coding & AlgorithmsBit ManipulationGreedy
23
1
241 people solved
Sep 16, 2026
Visa logo
Visa
Hard
Software EngineerSenior+

Count Ways to Build a Target from Increasing Dictionary Columns

You are given equal-length words and a target string. Build the target from left to right. For each target character, choose a matching character from...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
22 people solved
Oct 17, 2026
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Design a Harmful-Content Identification System

Design a system that identifies harmful content. Define the modeling problem, labels, evaluation, and deployment workflow before choosing a model. Con...

Machine LearningML System DesignAnnotation & Label Quality
1
0
13 people solved
Oct 28, 2026
xAI logo
xAI
Medium
Software EngineerNew Grad

Design a URL Shortening Service: Code Generation, Redirect Path, and Scaling

Design a URL shortening service. A user submits a long URL and gets back a short link; anyone who opens the short link is redirected to the original U...

System DesignSystem Design FundamentalsCaching
21
0
165 people solved
Sep 5, 2026
Rippling logo
Rippling
Medium
Software Engineer

Design a User Behavior and Metrics Monitoring Aggregator

Design a system that collects user-behavior events and monitoring metrics, aggregates them, and makes the results available for inspection. Define the...

System DesignObservabilityBatch & Stream Processing
2
0
19 people solved
Oct 20, 2026
Mercor logo
Mercor
Hard
Software Engineer

Sort With a 90%-Accurate Paid Comparator: Algorithm, Accuracy and Cost

You are given a set of n objects that must be sorted by an underlying value you cannot read directly. The only way to learn anything about the values ...

Statistics & MathSortingProbability
22
0
203 people solved
Sep 12, 2026
Mercor logo
Mercor
Medium
Machine Learning Engineer

Exploring a friend network through a restricted API with as few calls as possible

A social product stores friendships between users, but you cannot read the graph directly. The only access is a remote API: `python def get_friends(us...

Software Engineering FundamentalsGraphsAPI Integration & HTTP Clients
20
0
223 people solved
Sep 25, 2026
Infosys logo
InfosysGoogleMicrosoft

Also asked at Microsoft, Bloomberg, Goldman Sachs, Amazon, Apple, Meta, TikTok, SpaceX, Zoho, NVIDIA, Generalmotors, Texas Instruments, Uber

Medium
Software Engineer

Find the Cheapest Right-and-Down Grid Path

Problem Each entry in the rectangular grid costs is a nonnegative cost. A path starts in the upper-left cell, finishes in the lower-right cell, and ad...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
1
0
26 people solved
Glean logo
Glean
Medium
Data Scientist

SQL: Zero-Filled DAU, Rolling 30-Day MAU, and the MAU Impact of a User-ID Rehash

This SQL round for a data scientist role packed five SQL questions, each with a follow-up, into one hour. The bar was described as error-free answers,...

Data Manipulation (SQL/Python)SQL
6
2
118 people solved
Sep 30, 2026
eBay logo
eBay
Easy
Software Engineer

Model Hierarchical Permissions as Classes and Match Them with Breadth-First Search

Design a small set of classes that represent hierarchical permissions, then write the logic that decides whether a given permission is granted by sear...

Software Engineering FundamentalsGraphsAuthentication & Authorization
1
0
15 people solved
Oct 28, 2026
Perplexity logo
Perplexity
Hard
Software Engineer

In-Memory File System: Strict mkdir, touch, ls, rm, rmdir and a Command Runner

Implement an in-memory file system with directories and files under a single root, /. The task is delivered as a multi-file project with provided test...

Software Engineering FundamentalsData Structure DesignLow-Level Design (OOP)
26
0
241 people solved
Sep 25, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Meta, Microsoft, Oracle, Samsung

Medium
Software Engineer

Compute a Quotient Using Signed 32-Bit Operations

Problem Return the integer quotient of dividend and divisor without using multiplication, division, or remainder/modulo operators. Discard the fractio...

Coding & AlgorithmsMath & Number Theory
4
0
32 people solved
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