Contains almost all topics for Interview Preparation for a full stack developer or frontend engineer or backend developer or to become a junior to senior developer Consolidated place to prepare for tech interviews(Currently adding all topic's name and then will add the contents).

Table of contents

• General Topics
  • DS Algo
  • OOPS
  • Principles
  • Clean Code
  • Design Patterns
  • Object Oriented Design
  • System Design
• Frontend
  • General ui questions
  • Js
  • HTML
  • CSS
• Backend
  • Java
  • Spring
    • Spring Core
    • Spring Web MVC
    • Spring Boot
    • Spring Aspect-Oriented Programming (AOP)
    • Spring 5
  • Database Connectivity - JDBC, Spring JDBC & JPA, Hibernate
  • Unit Testing
• Web Services
  • SOAP Web Services
  • RESTful Web Services
• Databases
  • MongodDB
  • MySQL
• Microservices
  • Apache Kafka
  • Docker
  • Kubernetes
  • Redis
  • Akka
  • Netflix Stack
    • Discovery Server - Eureka
    • Client Side Load Balancer - Ribbon
    • API Gateway - Zuul
    • Circuit Breakers/Resilience/Fault tolerance - Hystrix
• Others
  • OAuth2
  • SSL
  • JWT
• Questions to Ask after interview
• Open source contributions

Table of contents generated with markdown-toc

Codechef DS certification and preparation path with required links

• Asymptotic analysis (Big-O notation) Basic Data Structures:
  • Arrays,
  • Strings,
  • Stacks,
  • Queues,
  • Trees,
  • Graphs
• Basic math operations (addition, subtraction, multiplication, division, exponentiation)
• Sqrt(n) primality testing
• Euclid's GCD Algorithm
• Basic Recursion
• Greedy Algorithms
• Basic Dynamic Programming
• Naive string searching
• O(n logn) Sorting
• Binary Searching
• Divide and Conquer

Standford Algorithms Playlist 1
Standford Algorithms Playlist 2
Sample DS Interview questions
Geeks for Geeks for almost all types of algorithms example in the world

• Object
• Class
• Inheritance
• Polymorphism
• Abstraction
• Encapsulation
• Object-Oriented design:
  • Coupling
  • Cohesion
  • Association
  • Aggregation
  • Composition

OOPs concept theory
Characteristics of good OOD

• SOLID
  1. Single Responsibility
  2. Open/Closed
  3. Liskov Substitution
  4. Interface Segregation
  5. Dependency Inversion
• YAGNI "You Aren't Gonna Need It"
• KISS "Keep It Simple, Stupid"
• DRY "Dont Repeat Yourself"

-- Gist link -- https://gist.github.com/bansalankit92/6119c4f7fabe11b7a174a99f5a7bb376

• General rules
• Names rules
• Functions rules
• Comment rules
• Formatting / Source code structure
• Classes and Objects
• Objects/Data structures/POJO
• Exceptions/ Error Handling
• Tests rules
• Design rules
• Understandability tips
• Refactor
• Code smells

-- Design patterns are typical solutions to common problems in software design. Each pattern is like a blueprint that you can customize to solve a particular design problem in your code.

• Creational patterns provide object creation mechanisms that increase flexibility and reuse of existing code.

  • Factory Method
  • Abstract Factory Method
  • Builder
  • Prototype
  • Singleton

• Structural patterns explain how to assemble objects and classes into larger structures, while keeping the structures flexible and efficient.

  • Adapter
  • Bridge
  • Composite
  • Decorator
  • Facade
  • Flyweight
  • Proxy

• Behavioral patterns take care of effective communication and the assignment of responsibilities between objects.

  • Chain Of Responsibility
  • Command
  • Iterator
  • Mediator
  • Memento
  • Observer
  • State
  • Strategy
  • Template Method
  • Visitor

Object-Oriented Design and UML

• Object-Oriented Basics
• OO Analysis and Design
• What is UML?
• Use Case Diagrams
• Class Diagram
• Sequence diagram
• Activity Diagrams

Object Oriented Design Case Studies

• Design a Library Management System
• Design a Parking Lot
• Design Amazon - Online Shopping System
• Design Stack Overflow
• Design a Movie Ticket Booking System
• Design an ATM
• Design an Airline Management System
• Design Blackjack and a Deck of Cards
• Design a Hotel Management System
• Design a Restaurant Management system
• Design Chess
• Design an Online Stock Brokerage System
• Design a Car Rental System
• Design LinkedIn
• Design Cricinfo
• Design Facebook - a social network

Design Baics

• Concurrency
• CAP Theorem
• Load Balancing
• Consistent Hashing
• Caching
• Indexes
• Proxies
• SQL vs. NoSQL
• Data Partitioning
• Data Replication
• Horizontal vs Vertical Scaling
• Map Reduce
• Long-Polling vs WebSockets vs Server-Sent Events

Design Problems

• Design Full Text Search
• Design Lift/Elevator
• Design Coffee Vending machine
• Design Parking System
• Design a URL Shortening service like TinyURL
• Design Quartz Scheduler
• Design a Web Crawler
• Design Pastebin
• Design Push notification.
• Design Instagram
• Design Dropbox/Google drive
• Design Facebook Messenger
• Design Twitter
• Design Youtube or Netflix
• Design Movie ticket system(BookMyShow)
• Design Typeahead Suggestion
• Design an API Rate Limiter
• Design Event Management System
• Design Twitter Search
• Design Facebook's Newsfeed
• Design Yelp or Nearby Friends
• Design Uber backend
• Other famous platforms like Quora, UberEats, Reddit, Hackerrank

Read:
https://gist.github.com/vasanthk/485d1c25737e8e72759f
http://highscalability.com/
Video:
https://www.youtube.com/watch?v=ZgdS0EUmn70

• What did you learn yesterday/this week?
• What excites or interests you about coding?
• What is a recent technical challenge you experienced and how did you solve it?
• When building a new web site or maintaining one, can you explain some techniques you have used to increase performance?
• Can you describe some SEO best practices or techniques you have used lately?
• Can you explain any common techniques or recent issues solved in regards to front-end security?
• What actions have you personally taken on recent projects to increase maintainability of your code?
• Which version control systems are you familiar with?
• Can you describe your workflow when you create a web page?
• If you have 5 different stylesheets, how would you best integrate them into the site?
• Can you describe the difference between progressive enhancement and graceful degradation?
• How would you optimize a website's assets/resources?
• What does CORS stand for and what issue does it address?
• Do you have any pet projects? What kind?
• Explain your current project with data flow architecture, file structure,...?

Basics

• JavaScript Fundamentals
• Code quality
• Objects: (this, GC, new)
• Data types and DS
• Advanced working with functions (Closures, NFE, call/apply)
• Object properties configuration
• Prototypes, inheritance
• Classes
• Error handling
• Promises, async/await, callbacks
• Generators, advanced iteration
• Modules

Advanced

• Browser: Document, Events, Interfaces
• Frames and windows
• Binary data, files
• Network requests - websockets/http
• Storage and IndexDB
• Animation
• Web components
• Regular expressions
• Web workers
• Caching API
• Accessibility

New features

• ES2015
• ES6
• ES7

JavaScript Concepts JavaScript Professionals Must Know Well

• What were some of the key goals and motivations for the HTML5 specification?
• What are some of the key new features in HTML5?
• What are "web workers"?
• How do you indicate the character set being used by an HTML5 document? How does this differ from older HTML standards?
• Discuss the differences between an HTML specification and a browser's implementation thereof.
• Briefly describe the correct usage of the following HTML5 semantic elements:
  ,

  ,

  ,
• Can a
  contain

  elements? Can an

  contain

  elements? Provide usage examples.
• Can a web page contain multiple
  elements? What about
• Describe the relationship between the
  and

  tags in HTML5.

• Give a simple implementation of the tag to embed a video stored at http://www.example.com/amazing_video.mp4. Give the video a width of 640 pixels by 360 pixels. Provide the user with controls.
• Write the code necessary to create a 300 pixel by 300 pixel . Within it, paint a blue 100 pixel by 100 pixel square with the top-left corner of the square located 50 pixels from both the top and left edges of the canvas.
• What is HTML5 Web Storage? Explain localStorage, sessionStorage, cookies.
• What is the difference between span and div?
• What is the Geolocation API in HTML5?
• What's one main result if you do not specify a doctype in an HTML page?
• What's the difference between the elements?
• Describe the difference between