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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Meta logo
Meta
Medium
Data Scientist

Design Sampling Strategy to Estimate Fake News Proportion

Design Sampling Strategy to Estimate Fake News Proportion Estimating Fake News Prevalence and Impact on Facebook Context Management is concerned about...

Statistics & Math
25
0
44 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Design an ads ranking system with calibration

This question evaluates a candidate's ability to design scalable, low-latency online machine learning systems for ads ranking, covering competencies i...

ML System DesignCTR Prediction & Ads MLRanking Models
11
0
173 people solved
Jan 21, 2026
Microsoft logo
Microsoft
Hard
Data Scientist

Implement lower_bound on unknown-size sorted array

Lower Bound in Unknown-Length Nondecreasing Array via API Setup You are given a non-decreasing integer array A of unknown length n. You cannot access ...

Coding & Algorithms
6
0
91 people solved
Oct 13, 2025
xAI logo
xAI
Medium
Software Engineer Locked

Design backend to score and classify tweets

This question evaluates backend system design skills including data modeling and ingestion, integration with external LLM-style inference APIs, worker...

System DesignSystem Design FundamentalsData Quality & Validation
16
0
139 people solved
Dec 1, 2025
Lyft logo
Lyft
Medium
Software Engineer

Describe a challenging resume project

Describe a challenging resume project Behavioral Deep-Dive: Project You’re Most Proud Of Provide a structured walkthrough of one project from your res...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
10
0
98 people solved
Jul 27, 2025
Robinhood logo
Robinhood
Medium
Data Scientist

Evaluate Core Metrics for New Product Feature Launch

Evaluate Core Metrics for New Product Feature Launch Scenario You are a data scientist evaluating the health of a newly launched product feature in a ...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
13
0
106 people solved
Aug 4, 2025
Morgan Stanley logo
Morgan Stanley
Easy
Data Scientist

Explain forward contracts and options

In a finance-focused technical interview, you are asked to explain two basic derivative instruments: 1. What is a forward contract? 2. What is an opti...

Software Engineering Fundamentals
6
0
57 people solved
Oct 21, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Weekly CTR and Campaign-Specific CTR in SQL

AdEvents ad_id | campaign_id | event | view_id | event_date 1 | 10 | impression | 123 | 2023-11-07 1 | 10 | cli...

Data Manipulation (SQL/Python)
69
2
286 people solved
Jul 12, 2025
Meta logo
Meta
Hard
Data Scientist

Analyze Change in App Metrics and Feature Impact

Analyze Change in App Metrics and Feature Impact Scenario A consumer app has either launched a new feature or observed a sudden change in a key metric...

Analytics & Experimentation
5
0
51 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Decode a JWT string without libraries

This question evaluates understanding of JWT structure, Base64URL encoding, string manipulation, and JSON parsing as applied to decoding token compone...

Coding & Algorithms
2
0
52 people solved
Feb 11, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Compute nearest dashmart distances for queries

You are given an m x n grid where each cell is one of: -1 for a wall (impassable), 0 for a dashmart (a store), and INF = 2^31 - 1 for an empty room. M...

Coding & AlgorithmsGrids & MatricesGraphs
13
0
126 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Find longest substring without repeating characters

Problem Given a string s, return the length of the longest contiguous substring that contains no repeated characters. Input - s: a string (may contain...

Coding & AlgorithmsTwo Pointers & Sliding Window
4
0
85 people solved
Nov 25, 2025
Aeonea logo
Aeonea
Medium
Software Engineer

Find two numbers summing to target

Given an unsorted integer array and a target value, return the indices of two distinct elements whose sum equals the target. Aim for an O(n) time solu...

Coding & Algorithms
3
0
32 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Hard
Software Engineer

Shard a Large Input Embedding Table Across Devices

An LLM's input embedding matrix has shape [V,H] and is too large for one device. Compare sharding along the vocabulary dimension with sharding along t...

ML System DesignPartitioning & Consistent HashingLLM Inference & Serving
1
0
14 people solved
Jan 19, 2026
TikTok logo
TikTok
Medium
Data Scientist

Align Conflicting Stakeholders for Successful Project Delivery

Behavioral Interview: Aligning Conflicting Stakeholders Cross-functional projects often require coordination between data scientists, engineers, produ...

Behavioral & Leadership
15
0
75 people solved
Jul 12, 2025
CVS Health logo
CVS Health
Easy
Data Scientist Locked

Reduce LLM hallucination and handle class imbalance

This question evaluates applied machine learning competencies including LLM safety and hallucination mitigation, retrieval-augmented generation and to...

Machine Learning
7
0
54 people solved
Oct 17, 2025
Oracle logo
Oracle
Medium
Software Engineer

Describe cross-team collaboration

Describe cross-team collaboration Behavioral & Leadership: Cross‑Team Collaboration (Onsite SWE) You are interviewing onsite for a Software Engineer r...

Behavioral & LeadershipConflict & Collaboration
10
0
105 people solved
Aug 7, 2025
Amazon logo
Amazon
Medium
Data Scientist

Design an Automated Home-Price Valuation Model

Design an Automated Home-Price Valuation Model Scenario You are building an automated house-price valuation service for a real-estate platform. Questi...

Machine Learning
65
0
228 people solved
Aug 4, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Count subarrays with product under target

Given an array of positive integers nums and an integer T > 1, return the number of contiguous subarrays whose product is strictly less than T. Provid...

Coding & Algorithms
2
0
55 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Describe project impact and feedback

Behavioral Prompt: Describe a Recent Project You Led Context You are interviewing for a Software Engineer role in an onsite Behavioral & Leadership ro...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
10
0
88 people solved
Sep 6, 2025
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