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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
Robinhood logo
Robinhood
Medium
Backend Engineer

Explain a Conflict During Backend Delivery

Describe a conflict you encountered while delivering a project and how you handled it. Explain the competing concerns, your actions, and the outcome. ...

Behavioral & LeadershipConflict & Collaboration
0
0
9 people solved
Sep 29, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Mission motivation and a walkthrough of your school, major and job decisions

These are two behavioral conversations from the same interview loop. In a 30-minute panel that opens with a self-introduction, the interviewers care l...

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making
3
0
32 people solved
Sep 2, 2026
Google logo
GoogleAgodaOracle

Also asked at Oracle, PayPal, Rivian, Microsoft, Amazon, SoFi, Turing, Expedia

Easy
Software Engineer

Find the Shortest Segment Preserving Array Degree

Problem The degree of nums is its highest value frequency. Return the minimum length of a contiguous subarray having the same degree as the entire arr...

Coding & AlgorithmsArrays & Strings
1
0
15 people solved
Discord logo
Discord
Medium
Data ScientistSenior+

Explain a Business Project That Used Causal Inference

Explain a Business Project That Used Causal Inference Describe a time you used causal inference to solve a business issue. Explain the identification ...

Behavioral & LeadershipCausal InferenceProject Deep Dive
5
0
41 people solved
Sep 26, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement a Simple Memory Allocator

Design and implement a simplified memory allocator exposing malloc(size) and free(ptr) over a single fixed-size heap (a contiguous byte array). The al...

Software Engineering FundamentalsMemory ManagementData Structure Design
74
0
767 people solved
May 29, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Improve classifier with noisy multi-annotator labels

Problem You are given a text dataset for a binary classification task (label in $\{0,1\\}$). Each example has been labeled by multiple human annotator...

Machine LearningAnnotation & Label QualityModel Evaluation
1034
3
6992 people solved
Feb 11, 2026
Google logo
GoogleMicrosoftTCS

Also asked at TCS, EPAM Systems, Amazon, Meta, Bloomberg, Oracle, Deloitte, Apple, Zoho, Visa, Twitch

Easy
Software Engineer

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
1
0
17 people solved
ByteDance logo
ByteDance
Medium
Machine Learning Engineer

Explain LLM generational improvements, multimodal LLMs, and normalization in LLMs

The interviewer asked three conceptual questions about large language models (LLMs): how models have improved from one generation to the next accordin...

Machine LearningTransformers & AttentionNeural Networks & Training
5
0
41 people solved
Oct 9, 2026
Epic Systems logo
Epic SystemsGoogle
Medium
Software Engineer

Recognize a Complete Additive Digit Partition

Problem Return whether num can be split into at least three decimal numbers such that every number after the first two equals their sum. Use the entir...

Coding & AlgorithmsBacktracking & RecursionMath & Number Theory
1
0
14 people solved
Glean logo
Glean
Medium
Frontend Engineer

Implement Two-Player Connect Four on a 6x7 Board with Win and Draw Detection

In the first technical round of a frontend engineer loop, the task was to implement Connect Four on a 6 x 7 board (6 rows, 7 columns) for two players....

Software Engineering FundamentalsSimulation & State MachinesReact & UI Frameworks
4
0
30 people solved
Sep 30, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Debug a Test-Driven C++ Project

Use a disciplined workflow to repair syntax, incomplete-function, and logic failures in a test-driven C++ project with bounded AI assistance.

Software Engineering FundamentalsDebuggingTesting & Quality
11
0
94 people solved
Aug 26, 2026
Instacart logo
Instacart
Medium
Software Engineer Locked

Add Backend Search and Filters to the Items API of a Library Lending System

A full-stack software engineering exercise that extends the items API of an existing library lending system with case-insensitive title search plus it...

Software Engineering FundamentalsAPI DesignAI-Assisted Development
7
0
92 people solved
Sep 3, 2026
Mercor logo
Mercor
Medium
Software Engineer

Debug a Java CSV Export Function for Output and Performance Bugs

You are given a small Java utility that turns a table of string fields into CSV text for another system to import, and it is used for large exports. F...

Software Engineering FundamentalsDebuggingProgramming Languages
2
0
30 people solved
Oct 4, 2026
Mixpanel logo
Mixpanel
Medium
Data Scientist

Aggregate User Events and Check Join Uniqueness

Build a User Activity Summary from Event Data You have two tables. The intended user summary contains one row per user_id, and the users table provide...

Data Manipulation (SQL/Python)SQL
6
0
49 people solved
Sep 9, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Calculate Completion Time for a Single-Server Reactor Queue

This Hudson River Trading coding question focuses on queue simulation for a single-server process with arrival times and task durations. It helps cand...

Coding & Algorithms
26
1
250 people solved
Jul 2, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design a Thread-Safe Buffered Writer with a Background Flush Thread

This question assesses a candidate's ability to design a concurrent, thread-safe component that decouples fast in-memory writes from slower disk I/O u...

System DesignConcurrencyData Structure Design
96
0
1117 people solved
Jun 23, 2026
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Bloomberg, Meta, Uber, Rokt, TikTok, DoorDash, Snowflake, Squarepoint, Apple, ByteDance, Snapchat, Canva

Hard
Software Engineer

Evaluate Parenthesized Sums with Unary Minus

Problem Evaluate a valid expression containing decimal numbers, plus, minus, parentheses and spaces. Unary minus is allowed; unary plus is not. Do not...

Coding & AlgorithmsStacks & QueuesParsing & Interpreters
1
0
17 people solved
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Evaluate an Integer Arithmetic Expression String With Operator Precedence

Given a string s that holds a valid arithmetic expression, return its integer value. The expression contains non-negative integers, the binary operato...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
5
0
63 people solved
Sep 12, 2026
C3 AI logo
C3 AI
Medium
Data ScientistIntern

Explain Training R-Squared After Adding a Random Feature

Explain Training R-Squared After Adding a Random Feature For an ordinary least-squares linear regression fitted on the same training observations, wha...

Statistics & MathRegression & Statistical ModelingModel Evaluation
4
0
31 people solved
Sep 15, 2026
Amazon logo
Amazon
Medium
Software Engineer

Add One Source to Minimize Grid Inconvenience

Add One Source to Minimize Grid Inconvenience Implement min_max_inconvenience(grid). grid is a non-empty rectangular matrix containing 0 and 1. A cell...

Coding & AlgorithmsGrids & MatricesGraphs
21
0
256 people solved
Jul 9, 2026
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