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

"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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Apple

Medium

Software EngineerSenior+

Redesign an Existing Relational Database to Reduce Read Latency

In a staff-level engineering screen, the interviewer describes the database design behind one of the team's real projects and asks how you would chang...

System DesignIndexing & Query PerformanceCaching

Software EngineerSenior+

Design a News Aggregator with Interest-Based Personalized Feeds

Design a news aggregation service in the style of Google News: it gathers articles from many publishers and shows each user a feed of stories. The key...

System DesignSearch & Feed SystemsPersonalization

Generate Every Letter String a Phone Keypad Digit Sequence Can Spell

On a standard telephone keypad, each of the digits 2 through 9 carries a set of letters: | Digit | Letters | | --- | --- | | 2 | a b c | | 3 | d e f |...

Coding & AlgorithmsBacktracking & Recursion

Splice a Second Linked List into the First Between Positions n and y

You are given two singly linked lists. Splice the second list into the first: the n-th node of the first list links to the head of the second list, an...

Coding & AlgorithmsLinked Lists

Nearest Person-to-Cake Distance and Greedy Closest-Pair Assignment Total

You are given an array A of length n in which every element is 0 (an empty spot), 1 (a person) or 2 (a cake). The distance between positions i and j i...

Coding & AlgorithmsHeaps & Priority QueuesArrays & Strings

Design a Food Order and Delivery Tracking System

Design a food-delivery tracking system with four requirements: 1. After placing an order, the customer can see its status. 2. The customer can track t...

System DesignGeo & Delivery SystemsDistributed Transactions & Idempotency

Machine Learning Engineer

Implement a 1-Nearest-Neighbor Classifier with a Manhattan-Distance Follow-Up

Implement a 1-nearest-neighbor (1-NN) classifier. You are given training points, each a vector of d numeric features with a class label, and a set of ...

Machine LearningML Coding

Rank Every Cell of a Distinct-Value Matrix Consistently Within Its Row and Column

You are given an m x n matrix of distinct integers. Return a matrix of the same shape in which every value is replaced by its rank, defined by these r...

Coding & AlgorithmsSortingGrids & Matrices

Explain a Significant Software Product You Built in Two Minutes

Think of a software product or solution you have built that you consider a significant achievement. In two minutes or less, explain: - the problem you...

Behavioral & LeadershipProject Deep Dive

Verify Business Records with Field and Name Rules

Implement verifyBusinesses(records, requiredFields, lengthField, forbiddenPhrases, ignoredSuffixes). Apply the validation stages below and return one ...

Coding & AlgorithmsArrays & StringsData Cleaning & Wrangling

Design a text-to-video GPU job scheduler with one GPU per task and fair queueing

Design the backend of a text-to-video generation service. Users submit generation requests, and each request becomes a task that runs on a GPU fleet. ...

System DesignJob Scheduling & WorkflowsFault Tolerance & Failover

Using AI Assistants in Your Development Workflow: Verification, Testing and Judgment

In the behavioral portion of a software engineer loop at a cybersecurity company, the interviewers mixed questions about your past work with hypotheti...

Behavioral & LeadershipAI-Assisted DevelopmentTesting & Quality

Software Engineer Locked

Design the Security Architecture for an LLM Chatbot Product

A system design question on securing a chatbot built on a large language model that talks with people outside the company. It tests threat modeling fo...

System DesignApplication SecurityAuthentication & Authorization

Software EngineerIntern Locked

Smallest Missing Positive Integer in Linear Time and Constant Extra Space

Find the smallest positive integer missing from an unsorted list that may contain negatives, zeros, duplicates and very large values. Tests careful ed...

Coding & AlgorithmsArrays & Strings

Embedding Retrieval with Cosine Similarity in a Notebook, and Choosing the Metric

The coding round is a notebook exercise (a hosted Python notebook, Colab-style): implement embedding and retrieval using cosine similarity. You embed ...

Machine LearningEmbeddings & Vector SearchML Coding

Implement a URL router that matches request paths against patterns with placeholders

Implement a URL request router for a web service. The router supports two operations: 1. processHandler(String handler) registers a handler pattern, f...

Software Engineering FundamentalsData Structure DesignTrees

Earliest Substring That Is a Rearrangement of a Pattern

Given a text s and a pattern p, find the first place in s where some rearrangement of p appears as a contiguous substring. Return the smallest index i...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Design a Restaurant Seat and Table Reservation System

Design a reservation system for restaurant seating. Diners search a restaurant's availability for a party size, date and time, book a slot, and can la...

System DesignSystem Design FundamentalsTransactions & Isolation

119 people solved

Sep 23, 2026

SquarepointWalmart LabsPalo Alto Networks

Medium

Software Engineer

Reorder One Array to Win as Many Position Comparisons as Possible

Problem Rearrange nums1 to maximize the number of indices i where the rearranged value is strictly greater than nums2[i]. Return any maximizing permut...

Coding & AlgorithmsGreedySorting

60 people solved

Waymo

Medium

Data Scientist Locked

SQL: Count Users With Zero or One Rides per City

Write a PostgreSQL query that counts, per city, the users who have taken zero or one ride in total, including users who never rode. Tests outer joins ...

Data Manipulation (SQL/Python)SQL

300 people solved

Sep 10, 2026

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Tech Interview Questions

Redesign an Existing Relational Database to Reduce Read Latency

Design a News Aggregator with Interest-Based Personalized Feeds

Generate Every Letter String a Phone Keypad Digit Sequence Can Spell

Splice a Second Linked List into the First Between Positions n and y

Nearest Person-to-Cake Distance and Greedy Closest-Pair Assignment Total

Design a Food Order and Delivery Tracking System

Implement a 1-Nearest-Neighbor Classifier with a Manhattan-Distance Follow-Up

Rank Every Cell of a Distinct-Value Matrix Consistently Within Its Row and Column

Explain a Significant Software Product You Built in Two Minutes

Verify Business Records with Field and Name Rules

Design a text-to-video GPU job scheduler with one GPU per task and fair queueing

Using AI Assistants in Your Development Workflow: Verification, Testing and Judgment

Design the Security Architecture for an LLM Chatbot Product

Smallest Missing Positive Integer in Linear Time and Constant Extra Space

Embedding Retrieval with Cosine Similarity in a Notebook, and Choosing the Metric

Implement a URL router that matches request paths against patterns with placeholders

Earliest Substring That Is a Rearrangement of a Pattern

Design a Restaurant Seat and Table Reservation System

Reorder One Array to Win as Many Position Comparisons as Possible

SQL: Count Users With Zero or One Rides per City

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