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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
Google logo
Google
Medium
Software Engineer Locked

Process Sharded Login Logs

This question evaluates understanding of distributed systems, stream processing, and reliable data engineering concepts related to ingestion, ordering...

Software Engineering FundamentalsData Ingestion & CDCBatch & Stream Processing
40
0
452 people solved
Apr 12, 2026
Amazon logo
Amazon
Medium
Data ScientistSenior+

Implement list overlap and dense-ranked word frequencies

Part A — Multiset overlap count Implement count_overlap(a: List[int], b: List[int]) -> int that returns the size of the multiset intersection of a and...

Coding & Algorithms
8
0
75 people solved
Oct 13, 2025
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Manipulate and merge DataFrames correctly

Given three pandas DataFrames: customers customer_id, join_date, tier 101, 2025-01-02, gold 102, 2025-02-10, silver 103, 2025-03-05, gold products mod...

Data Manipulation (SQL/Python)
2
0
40 people solved
Oct 13, 2025
Databricks logo
Databricks
Medium
Machine Learning EngineerSenior+ Locked

Resolve a Design Conflict

This question evaluates conflict resolution, stakeholder management, technical decision-making, and collaborative leadership skills within a Machine L...

Behavioral & Leadership
10
0
71 people solved
Feb 7, 2026
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Clean OCR data and build an LLM dataset

This question evaluates competency in OCR data cleaning and normalization, dataset engineering for LLM fine-tuning, quality filtering, and evaluation ...

Machine LearningData Cleaning & WranglingAnnotation & Label Quality
8
0
118 people solved
Feb 11, 2026
Pika logo
Pika
Hard
Software Engineer

Evaluate Spreadsheet Cells and Reject Circular References

Problem Implement a small spreadsheet with columns A through Z and rows 1 through 26. A cell stores either an integer or a formula consisting of one c...

Coding & Algorithms
1
0
25 people solved
Jan 4, 2026
Ramp logo
Ramp
Hard
Software EngineerSenior+ Locked

Present a System You Designed

Present a system you personally designed, moving from the problem and constraints through architecture, ownership, and key trade-offs. A strong explan...

Behavioral & Leadership
5
0
72 people solved
May 25, 2026
Instacart logo
Instacart
Hard
Machine Learning Engineer Locked

Explain Core ML Concepts

This question evaluates understanding of core supervised learning concepts—comparing linear and logistic regression, interpreting the bias–variance tr...

Machine LearningML FundamentalsRegression & Statistical Modeling
12
0
130 people solved
Feb 10, 2026
BlackRock logo
BlackRock
Easy
Software Engineer

Evaluate a verbal reasoning passage

True/False/Cannot Say – Reading Comprehension Instructions Read the passage and label each statement as True, False, or Cannot Say based only on the p...

Statistics & Math
9
0
106 people solved
Sep 6, 2025
C3 AI logo
C3 AI
Hard
Data Scientist Locked

Find the Intersection of Two Linked Chains

Find the first shared node of two acyclic linked chains using node identity and constant extra space. Practice the pointer-switching technique for une...

Coding & Algorithms
1
0
19 people solved
Aug 15, 2026
TikTok logo
TikTok
Medium
Data Scientist

Write SQL for 7-day geo-localized revenue dashboard

Write a single SQL query (assume PostgreSQL; tz_offset is an integer hour offset from UTC) to compute a 7-day dashboard by local user date for US vs A...

Data Manipulation (SQL/Python)
3
0
32 people solved
Oct 13, 2025
Google logo
Google
Medium
Software Engineer Locked

Find where to cut cake into equal areas

This question evaluates geometric area computation, handling of piecewise-constant profiles formed by adjacent rectangles, and attention to numerical ...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
13
0
120 people solved
Jan 6, 2026
Affirm logo
Affirm
Easy
Software Engineer

Implement an LRU cache

Problem Design and implement an LRU (Least Recently Used) cache that supports the following operations in average O(1) time: - get(key) -> value: Retu...

Coding & AlgorithmsData Structure Design
15
0
128 people solved
Nov 6, 2025
TripStack logo
TripStack
Hard
Software Engineer

Explain Go concurrency and database choices

Go Concurrency, Cross-Language Comparison, Database Trade-offs, and Storage Design Part A — Concurrency in Go 1. Explain synchronous vs asynchronous e...

System Design
14
0
93 people solved
Sep 6, 2025
Waymo logo
Waymo
Medium
Machine Learning Engineer

Explain Model Compression Techniques

Explain quantization-aware training, knowledge distillation, evaluation mode in deep learning frameworks, and contrastive learning. For each topic, de...

Machine LearningNeural Networks & Training
7
0
129 people solved
Nov 27, 2025
Google logo
Google
Hard
Software Engineer

Find secret word with match-count feedback

Problem You are given a list of unique lowercase words, all of the same length (e.g., length = 6). One of these words is a secret word. You can intera...

Coding & Algorithms
22
0
228 people solved
Feb 11, 2026
DoorDash logo
DoorDash
Hard
Data Scientist

Design an experiment for order batching

Experiment Design: Two-Order Batching Policy During Peak Hours Context DoorDash plans to test a dispatch policy that allows a dasher to pick up two ne...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
15
0
210 people solved
Oct 13, 2025
Anthropic logo
Anthropic
Medium
Software Engineer

Find and remove duplicate files

Given a directory tree that may not fit in memory, detect and optionally remove duplicate files. Define the algorithm, including how you handle very l...

Coding & AlgorithmsFile & Media StorageOperating Systems
31
0
241 people solved
Jul 26, 2025
Remitly logo
Remitly
Hard
Software Engineer

Design a Production-Ready URL Shortener

System Design: Production-Ready URL Shortening Service Goal Design a production-ready URL shortening service that can issue short links, resolve them ...

System DesignSystem Design FundamentalsCaching
14
0
136 people solved
Aug 13, 2025
Amazon logo
Amazon
Hard
Data Scientist

Compare Tableau live vs extract and filters

Scenario You are building an interactive dashboard over a 100M-row fact table. Compare Tableau connection options and performance behaviors for this s...

Analytics & ExperimentationBI & Reporting SystemsIndexing & Query Performance
8
0
92 people solved
Oct 13, 2025
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