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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
Google logo
GoogleAtlassianAmazon
Medium
Software Engineer

Find an Ancestor Shared by a Node Collection

Problem Given binary-tree root and a nonempty list nodes of distinct TreeNode pointers, return the lowest existing tree node that is an ancestor of ev...

Coding & AlgorithmsTrees
1
0
15 people solved
Google logo
GoogleMicrosoftMeta

Also asked at Meta, Amazon, Bloomberg, LinkedIn, Oracle, Palo Alto Networks, Josh Technology

Easy
Software Engineer

Mirror Binary-Tree Child Links through the Original Root

Problem Invert a binary tree by exchanging left and right children throughout the tree, and return its root. Keep the supplied TreeNode interface with...

Coding & AlgorithmsTrees
1
0
14 people solved
Tesla logo
Tesla
Medium
Product Manager

Tesla Touchscreen Redesign for Fewer Eyes-Off-Road Glances, With No Feature Lost

You are a product manager at Tesla. In Tesla's vehicles, most driver-facing controls run through a large central touchscreen rather than physical butt...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
1
0
12 people solved
Sep 30, 2026
Affirm logo
Affirm
Medium
Software Engineer

Design Installment-Loan Payment Processing

Design Installment-Loan Payment Processing Design a payment-processing system for an existing user's active installment loan. A payment may be initiat...

System DesignPayments & LedgersDistributed Transactions & Idempotency
41
0
337 people solved
Apr 19, 2026
Salient Ai logo
Salient Ai
Hard
Software EngineerSenior+

Find Duplicate Files by Content with Efficient I/O

Using supplied filesystem helpers, design an operation that finds files with identical contents. Explain how to reduce unnecessary file reads and memo...

Software Engineering FundamentalsFile & Media StorageOperating Systems
5
0
63 people solved
Aug 3, 2026
Hadrian logo
Hadrian
Hard
Software Engineer

Work Order Lead Time: Critical Path Through an Operations DAG to Shipping

A manufacturing work order is modeled as a directed acyclic graph. Each node is an operation, such as machining or inspection, that takes a whole numb...

Coding & AlgorithmsGraphsDynamic Programming
4
0
44 people solved
Sep 4, 2026
Cisco logo
Cisco
Easy
Software Engineer

Python Multiple Inheritance: Which Parent Method Runs When Names Collide

Two classes each define a method with the same name. A third class inherits from both of them. When that method is called on an instance of the third ...

Software Engineering FundamentalsProgramming Languages
1
0
20 people solved
Sep 19, 2026
Squarepoint logo
Squarepoint
Medium
Quantitative Researcher Locked

Shortest Subarray with at Least K Distinct Values

Find the shortest contiguous subarray containing at least k distinct values. Practice sliding-window invariants, frequency maps, and linear-time minim...

Coding & Algorithms
26
0
281 people solved
Aug 29, 2026
Hudson River Trading logo
Hudson River Trading
Easy
Software EngineerIntern Locked

Check Root-To-Leaf Target Sums In A Binary Tree

Practice a binary tree path-sum interview problem that asks whether any root-to-leaf path reaches a target value, including empty trees, single-node t...

Coding & Algorithms
23
1
185 people solved
Jul 3, 2026
Google logo
Google
Hard
Machine Learning Engineer Locked

Compare Language-Model Post-Training Methods

Compare supervised, reward-based, direct-preference, and group-relative LLM post-training by signal, objective, data regime, and failure modes.

Machine Learning
5
0
68 people solved
Aug 14, 2026
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Meta, Bloomberg, TCS, Criteo, GitHub

Easy
Software Engineer

Identify the Duplicated and Missing Set Values

Problem An original set 1..n lost one value when it was replaced by another existing value. Given the resulting n-element array nums, return [duplicat...

Coding & AlgorithmsArrays & Strings
0
0
11 people solved
Google logo
Google
Hard
Data Analyst

Balance Fraud Control with User Experience

Balance Fraud Control with User Experience Design a strategy to balance fraud control with improving the experience of legitimate users. Explain how y...

Product / Decision MakingBusiness Case AnalysisMetrics & KPIs
7
0
66 people solved
Sep 9, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer

Design a Card Deck with Shuffling, Dealing, and Five-Card Poker Comparison

Design an object-oriented playing-card system that can shuffle a deck, deal cards, and compare the strength of two five-card poker hands. Explain the ...

Software Engineering FundamentalsLow-Level Design (OOP)Math & Number Theory
4
0
57 people solved
Aug 1, 2026
Amazon logo
AmazonMicrosoftGoogle

Also asked at Google, Meta, TCS, Bloomberg, LinkedIn, Apple

Easy
Software Engineer

Compare Binary Trees at Matching Structural Positions

Problem Determine whether the binary trees rooted at p and q have exactly the same structure and the same value at every corresponding node. Left and ...

Coding & AlgorithmsTrees
0
0
12 people solved
Mercor logo
Mercor
Hard
Software Engineer Locked

Compare Merge Sort with Factorial and Randomized Inefficient Sorts

Explain merge sort, adaptive merging, permutation sorting, and random-shuffle sorting while distinguishing expected complexity from worst-case guarant...

Software Engineering FundamentalsSorting
5
0
84 people solved
Sep 3, 2026
Virtu Financial logo
Virtu FinancialCloudflareMicrosoft

Also asked at Microsoft, PayPal, Snapchat, KLA, BlackStone, Google, JPMorgan Chase

Hard
Software Engineer

Reverse Additive Coordinate Moves

Problem From (sx,sy), a move replaces (x,y) by either (x,x+y) or (x+y,y). Return whether the positive target (tx,ty) is reachable using zero or more m...

Coding & AlgorithmsMath & Number Theory
2
0
21 people solved
Headway logo
Headway
Medium
Data ScientistSenior+

Difference-in-Differences Evaluation and ROI of a State Availability Incentive Program

A booking marketplace ran an incentive program in Massachusetts to increase availability on its platform, paying \$200 per week. Assume availability i...

Analytics & ExperimentationCausal InferenceBusiness Case Analysis
0
0
3 people solved
Oct 31, 2026
Giga logo
Giga
Medium
Software Engineer Locked

Design Browser-Automated Support Under a Seven-Second SLA

Design a browser-automation support system for 1,500 concurrent tickets with a seven-second end-to-end reply SLA. Work through the 50-ticket visibilit...

System Design
8
0
78 people solved
Aug 3, 2026
Powertown logo
Powertown
Medium
Software Engineer

Early-Stage Startup Fit: Background, Motivation and Small-Team Ownership

In the first conversation of a software engineer interview loop at an early-stage startup, the interviewer explores your background, your motivation a...

Behavioral & LeadershipMotivation & FitOwnership & Execution
0
0
3 people solved
Nov 2, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Software Engineer Locked

Find Company Tickers Mentioned in a News Headline

Detect company names as consecutive whole-word sequences in a news headline and return their unique tickers in mapping order. This coding task evaluat...

Coding & Algorithms
35
0
246 people solved
Aug 3, 2026
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