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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Capital One logo
Capital One
Medium
Software Engineer

Count ordered pairs that concatenate to target

Given a list of integers numbers and an integer target, count the number of ordered pairs (i, j) with i != j such that concatenating numbers[i] follow...

Coding & AlgorithmsArrays & Strings
20
0
151 people solved
Sep 19, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Implement stream line reader and settle balances

Part 1: Streaming line reader from chunked source You are given an existing class ChunkSource with a method nextChunk() that returns the next piece of...

Coding & AlgorithmsData Structure Design
32
0
260 people solved
Sep 10, 2025
Amazon logo
Amazon
Medium
Applied Scientist

Find two numbers that sum to target

Given an integer array nums of length n and an integer target, return the indices (i, j) (0-based) of two distinct elements such that nums[i] + nums[j...

Coding & Algorithms
5
0
50 people solved
Nov 20, 2025
Amazon logo
Amazon
Medium
Software Engineer

Explain work-simulation approach under ambiguity

Behavioral: Prioritizing and Delivering Under Ambiguity in a Time-Boxed Simulation Context You are a software engineer in a technical screen. You are ...

Behavioral & Leadership
7
0
73 people solved
Sep 6, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Design a bidirectional data sync dashboard

This question evaluates distributed system design skills focused on reliable bidirectional data synchronization, conflict resolution, event ingestion,...

System DesignDistributed Transactions & IdempotencyAPI Integration & HTTP Clients
14
0
129 people solved
Feb 9, 2026
Capital One logo
Capital One
Medium
Machine Learning Engineer

Answer leadership scenarios with STAR

Answer the following behavioral questions with specific examples from your experience: 1. How did you challenge the status quo? 2. Describe a time you...

Behavioral & Leadership
3
0
67 people solved
Dec 15, 2025
Two Sigma logo
Two Sigma
Medium
Quantitative ResearcherIntern

Daily Temperatures by Town: Linear Models to Predict NYC Temperature

Daily Temperatures by Town: Linear Models to Predict NYC Temperature You are given a dataset of historical daily temperature readings for New York Cit...

Machine LearningRegression & Statistical Modeling
15
0
132 people solved
Sep 10, 2025
Google logo
Google
Hard
Software Engineer

Find maximum value in huge text file

You are given the path to a very large text file on disk. The file has the following properties: - Each line contains exactly one signed 64-bit intege...

Coding & AlgorithmsConcurrency
42
0
308 people solved
Dec 8, 2025
Capital One logo
Capital One
Medium
Data Scientist

Segment 500k users into three groups

Churn-Risk Segmentation to Maximize Expected 90-Day Revenue You must segment 500,000 users into three contiguous groups along a churn-risk score, orde...

Analytics & Experimentation
4
0
78 people solved
Oct 13, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Determine equality of arbitrarily nested sets

Implement a function that determines whether two arbitrarily nested sets are equal. Sets are unordered and contain no duplicates; elements can be inte...

Coding & AlgorithmsBacktracking & Recursion
21
0
196 people solved
Sep 6, 2025
Instacart logo
Instacart
Medium
Software Engineer

Evaluate arithmetic expression using DFS

Given a string representing an arithmetic expression with non-negative integers, +, -, *, /, parentheses, and optional spaces, evaluate its value. Use...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
7
0
109 people solved
Jul 31, 2025
Easy
Data Scientist

Check if a numeric string is divisible by 8

Question You are given a very large non-negative integer represented as a decimal string s (it may be too large to fit in standard 64-bit integer type...

Coding & Algorithms
8
0
63 people solved
Sep 28, 2025
Stripe logo
Stripe
Medium
Software Engineer

Build and Validate Passport Form UI

Passport Pattern Validation UI and Logic Context: Implement this in a vanilla HTML/CSS/JavaScript environment (single file, no frameworks). You are gi...

Software Engineering Fundamentals
10
0
87 people solved
Aug 13, 2025
Nextdoor logo
Nextdoor
Medium
Software Engineer

Implement version string comparator with extensions

Implement a function compareVersions(a, b) that compares two software version strings. Each version consists of dot-separated numeric components (e.g....

Coding & AlgorithmsParsing & InterpretersArrays & Strings
19
0
152 people solved
Jul 31, 2025
Meta logo
Meta
Medium
Software Engineer

Design a bank system with scheduled transfers

Bank System (OOD): Accounts, Transfers, Scheduling, Top Spending, Merge Design an in-memory banking system that supports: - account creation - deposit...

Coding & Algorithms
4
0
70 people solved
Feb 11, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer

Compute longest palindromic subsequence

Given a string s (1 ≤ |s| ≤ 2000), implement a function that returns the length of the longest subsequence of s that reads the same forward and backwa...

Coding & Algorithms
4
0
60 people solved
Aug 1, 2025
CVS Health logo
CVS Health
Medium
Data Scientist

Compute A/B significance, CI, and power

You run an A/B test for 7 days. Control A: 520 conversions out of 10,000 sessions. Variant B: 630 conversions out of 11,500 sessions. Use a calculator...

Statistics & MathHypothesis TestingExperiment Analysis & Readout
16
0
152 people solved
Oct 13, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Implement string-based big integer multiplication

Question Implement multiplyStrings(a, b) to multiply two non-negative integers given as decimal strings and return their product as a decimal string. ...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
26
0
198 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Machine Learning Engineer

Design an LLM Chatbot: Training Data, Reward Design and Deployment Considerations

Design a chatbot built on a large language model. Walk through the whole lifecycle, and explain three areas in depth: how you would build the training...

ML System DesignFine-Tuning & Alignment TechniquesReinforcement Learning
1
0
11 people solved
Jan 3, 2026
Capital One logo
Capital One
Hard
Data Scientist

Design A/B test for credit card offer

A/B Test Design: New Credit-Card Acquisition Flow (Revised APR Disclosure + Signup Bonus) Context You are launching a new credit-card acquisition flow...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing
14
0
138 people solved
Oct 13, 2025
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