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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
Amplitude logo
Amplitude
Medium
Software Engineer

Implement lossless dictionary encoding and decoding

Dictionary encoding is a lossless compression technique for a list of tokens. You are given an input string consisting of words separated by commas, e...

Coding & AlgorithmsParsing & InterpretersArrays & Strings
6
0
105 people solved
Feb 25, 2026
Databricks logo
Databricks
Hard
Data ScientistSenior+ Locked

Find Top-5 Similar Rows

This question evaluates pairwise similarity matching, numerical feature comparison using mean squared error, null-value exclusion, and deterministic t...

Data Manipulation (SQL/Python)SQLPandas & Python Data
13
0
95 people solved
Mar 5, 2026
Google logo
Google
Medium
Product Manager

Choosing a North Star and Guardrail Metrics for Zoom Video Meetings

You are the product manager for Zoom's video meetings product, and leadership wants to know whether it is succeeding. How would you measure Zoom's suc...

Analytics & ExperimentationMetrics & KPIs
1
0
8 people solved
Jul 24, 2026
Meta logo
Meta
Medium
Data Scientist

Write SQL with HAVING and efficient joins

You are given two tables. Schema - interactions(product_id INT, buyer_id INT, seller_id INT, interaction_date DATE, interaction_type VARCHAR, interact...

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

Implement File Tail and Sensor Health

This question evaluates skills in large-file streaming and buffer/pointer manipulation for tailing files, along with data-structure and time-window re...

Coding & AlgorithmsOperating SystemsData Structure Design
19
0
175 people solved
Jan 28, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Detect n-length consecutive sequences

Given an unsorted collection of integers and a parameter n > 0, determine whether there exists a set of n distinct integers that form a run of consecu...

Coding & AlgorithmsArrays & Strings
32
0
308 people solved
Aug 13, 2025
Datologyai logo
Datologyai
Easy
Software Engineer

Text Editor with a Cursor: Typing, Backspace, and Four-Way Cursor Movement

Implement a TextEditor class that holds one document and a cursor. The cursor sits between two characters, or at the start or end of the text, and eve...

Software Engineering FundamentalsData Structure DesignStacks & Queues
3
0
52 people solved
Jan 1, 2026
Mercor logo
Mercor
Medium
Software Engineer Locked

Reason About Coffee-Quality Comparison Probabilities

Analyze coffee-quality comparison probabilities by defining the event, independence, and ties, then use labeled orderings to derive conditional result...

Statistics & MathProbabilityPuzzles & Brainteasers
15
0
105 people solved
Sep 3, 2026
Amazon logo
AmazonGoogleMicrosoft
Medium
Software Engineer

Erase Each Star and Its Nearest Remaining Letter to the Left

Problem Repeatedly choose a star in s and remove it together with the closest non-star character to its left. The input guarantees valid removals and ...

Coding & AlgorithmsStacks & QueuesArrays & Strings
0
0
7 people solved
OpenAI logo
OpenAI
Medium
Software Engineer

Implement delimiter-free string codec

Design an encoder/decoder for a list of strings. - Implement two functions: - encode(strings: List[str]) -> str - decode(blob: str) -> List[str] -...

Coding & AlgorithmsParsing & Interpreters
22
0
186 people solved
Oct 31, 2025
Capital One logo
Capital One
Medium
Data Scientist

Compute Customer Spend and Engineer Features for 2023

transactions +-----------+-------------+--------+------------+--------------+ | tran_id | customer_id | amount | tran_date | merchant_cat | +------...

Data Manipulation (SQL/Python)
124
0
597 people solved
Aug 4, 2025
OpenAI logo
OpenAI
Easy
Machine Learning Engineer Locked

How would you build an image classifier with dirty data?

This question evaluates a candidate's ability to design end-to-end image classification systems and manage noisy image datasets, testing competencies ...

ML System DesignData Quality & Validation
60
0
582 people solved
Jan 6, 2026
Google logo
Google
Medium
Software Engineer

Simulate an In-Memory Directory Tree with mkdir, ls, Append and Read

Reported from a Google software engineering coding interview. Simulate a small in-memory file system. It starts with only the root directory /. You re...

Coding & AlgorithmsData Structure DesignTrees
2
0
29 people solved
Mar 4, 2026
Bloomberg logo
Bloomberg
Hard
Software Engineer

Explain Kafka partitions and delivery semantics

Kafka partitions, replication, consumer groups, and delivery guarantees Context You are designing and evaluating a Kafka-based data pipeline and need ...

System DesignMessaging & Event-DrivenDistributed Transactions & Idempotency
14
0
269 people solved
Sep 6, 2025
Nextdoor logo
Nextdoor
Medium
Data Scientist Locked

Measure Local News Launch Success

This question evaluates experimentation design, causal inference, metric definition, and the handling of interference and selection bias in product an...

Analytics & Experimentation
6
0
86 people solved
Mar 23, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Design a transaction class for deposits/withdrawals

This question evaluates understanding of stateful component design, transactional integrity, concurrency control, data modeling for transaction histor...

Software Engineering FundamentalsLow-Level Design (OOP)Payments & Ledgers
15
0
150 people solved
Jan 22, 2026
Circle logo
Circle
Medium
Data Scientist

Predict Future Car Sale Prices

You are given transaction-level data from car dealers for calendar year 2018, and you need to predict vehicle sale prices for transactions that will h...

Machine LearningRegression & Statistical ModelingFeature Engineering
10
0
116 people solved
Jan 19, 2026
Nuro logo
Nuro
Easy
Software Engineer Locked

Parse logs and count error codes

This question evaluates parsing and sanitizing structured text, extracting specific fields, and performing frequency aggregation of identifiers such a...

Coding & AlgorithmsParsing & Interpreters
7
0
122 people solved
Feb 12, 2026
Paradromics logo
Paradromics
Medium
Software Engineer

Implement a hash table with put/get

Problem Implement a simplified hash table (hash map) data structure from scratch. Required API Design a class HashTable with: - HashTable(int numBucke...

Coding & Algorithms
7
0
66 people solved
Mar 1, 2026
Google logo
GoogleAmazonMetaMeesho

Also asked at Meta, Meesho

Medium
Software Engineer

Earliest Time to Finish Enough Independent Trips

Problem Bus i takes time[i] units of time to complete one trip. All buses start at time zero, operate independently and immediately begin another trip...

Coding & AlgorithmsBinary Search
0
0
9 people solved
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