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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
Citadel logo
Citadel
Medium
Quantitative Trader

Solve probability and expectation problems

Probability and Statistics Mini-Set Context: Answer each item independently. Unless otherwise specified, assume independence and uniform randomness; d...

Statistics & MathProbabilityPuzzles & Brainteasers
42
0
331 people solved
Aug 11, 2025
Waymo logo
Waymo
Medium
Data Scientist

Compute Ride Metrics in SQL

You are given two tables for a ride-hailing product. Tables: - users: one row per registered user. - user_id BIGINT PRIMARY KEY - city VARCHAR NOT...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
24
0
201 people solved
Mar 7, 2026
Salesforce logo
Salesforce
Medium
Member of Technical Staff Locked

Implement Merge Sort and Return a Sorted Array

Implement merge sort from first principles and return integers in nondecreasing order without a built-in sort. The exercise covers empty input, duplic...

Coding & Algorithms
8
0
77 people solved
Aug 31, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Meta, Microsoft

Easy
Software Engineer

Are All Value Frequencies Different?

Problem Count how often each distinct integer appears in arr. Return true exactly when no two different values have the same occurrence count. `cpp cl...

Coding & AlgorithmsArrays & Strings
0
0
9 people solved
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design a Low-Latency Typeahead Service

Design a low-latency typeahead service that returns up to ten dynamically scored suggestions with deterministic tie-breaking, exact updates, sharding,...

System DesignSearch & Feed SystemsPartitioning & Consistent Hashing
10
0
185 people solved
Aug 11, 2026
eBay logo
eBay
Easy
Applied Scientist

Optimizing BERT inference latency and throughput for a production NLP service

A fine-tuned BERT-style encoder serves predictions in production (for example, classifying or tagging short text). It is now too slow or too expensive...

Machine LearningMLOps & Model ServingTransformers & Attention
1
0
16 people solved
Sep 24, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Deep-Clone a Hand-Built Doubly Linked List with an Arbitrary Special Pointer

Implement a doubly linked list in which every node has four fields: - value: the node's value (assume an integer); - left: the previous node, or null ...

Software Engineering FundamentalsLinked Lists
1
0
17 people solved
Aug 4, 2026
Retell AI logo
Retell AI
Medium
Software Engineer Locked

Design a Smooth Per-Customer Calls-Per-Second Controller

Design a service that smoothly paces outbound calls under a separate rate limit for each customer. Candidates must address durable admission, priority...

System Design
12
0
118 people solved
Jul 27, 2026
Pinterest logo
Pinterest
Medium
Machine Learning Engineer Locked

Hierarchical Access Control for an Advertising Platform

This question tests practical application of graph traversal and access control system design using a directed acyclic group hierarchy. It evaluates a...

Coding & Algorithms
5
0
90 people solved
Jun 3, 2026
Netflix logo
Netflix
Medium
Product Manager

Measuring the Effect of Short-Form Video Apps on Netflix Viewing Engagement

As a product manager at Netflix, you are asked how you would assess the impact that TikTok and YouTube Shorts have on Netflix engagement. Walk through...

Analytics & ExperimentationCausal InferenceMetrics & KPIs
1
0
13 people solved
Aug 18, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Behavioral Stories on Ownership, Ambiguity, Deep Dives and Conflict

The behavioral round of this entry-level software engineering onsite focused on four competencies: ownership, handling ambiguity, diving deep, and wor...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
2
0
19 people solved
May 28, 2026
TikTok logo
TikTok
Medium
Product Manager

TikTok Paid No-Ads Tier: Subscription Economics Versus the Advertising Business

You are a product manager at TikTok. Should TikTok build a premium subscription that lets people use the app without ads? Give a clear recommendation ...

Product Design & StrategyGrowth & MonetizationBusiness Case Analysis
0
0
13 people solved
Sep 14, 2026
StackAdapt logo
StackAdapt
Medium
Machine Learning Engineer Locked

Rebuild a Binary Tree From Preorder and Inorder Sequences, Returned in Level Order

Reconstruct a binary tree with distinct values from its preorder and inorder traversals and return it in level-order form with null markers. Tests how...

Coding & AlgorithmsTrees
7
0
61 people solved
Sep 9, 2026
Engelhart logo
Engelhart
Medium
Software Engineer

Exposing a Python Function as a REST Endpoint with FastAPI and Unit Testing It

Explain how you expose a Python function to other programs as a REST API endpoint, and how you unit test code like this. The questions came in the fun...

Software Engineering FundamentalsAPI DesignTesting & Quality
1
0
14 people solved
Sep 19, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a Visa-like payment processing system

This question evaluates a candidate's ability to design a secure, low-latency card payment processing network, testing knowledge of distributed system...

System DesignPayments & LedgersDistributed Transactions & Idempotency
31
0
541 people solved
Feb 12, 2026
Google logo
Google
Medium
Software Engineer

Add two big integers from digit lists

You are given two non-empty singly linked lists (or arrays) representing two non-negative integers. The digits are stored in reverse order, and each n...

Coding & AlgorithmsLinked ListsMath & Number Theory
20
0
189 people solved
Nov 24, 2025
Visa logo
VisaInfosysMicrosoftPoint72

Also asked at Microsoft, Point72

Medium
Software Engineer

Maximize the Bitwise OR Within a Doubling Budget

Maximize the Bitwise OR Within a Doubling Budget You are given a zero-indexed array nums of positive integers and an integer k. One operation chooses ...

Coding & AlgorithmsBit ManipulationGreedy
1
0
14 people solved
Deloitte logo
Deloitte
Medium
Product Manager

Request-for-Information Tool: Discovery, MVP Scope, Pilot and Rollout Plan

You have been asked to launch a Request for Information (RFI) tool. Walk through how you would plan its development and its launch. `hint Follow the R...

Product Design & StrategyRequirements & Launch ExecutionRoadmapping & Planning
2
0
16 people solved
Mar 16, 2026
Microsoft logo
MicrosoftGoogleMeta

Also asked at Meta, Amazon, Bloomberg

Medium
Software Engineer

Aggregate Monthly Transaction Totals and Approved Totals

Problem For each calendar month and country, report month, country, trans_count, approved_count, trans_total_amount and approved_total_amount. Month u...

Data Manipulation (SQL/Python)SQL
0
0
6 people solved
Canva logo
Canva
Easy
Software EngineerSenior+

Design an Online Bookshop with a Focus on Payments and Database Design

Design an online bookshop. Customers browse and search a catalog of books, add books to a cart, check out and pay, and later look up their orders. The...

System DesignPayments & LedgersDistributed Transactions & Idempotency
0
0
8 people solved
Jul 12, 2026
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