OopRefresher

Refresher code and study guide for Object Oriented Programming By Alejandro Echeverria (work in progress)

Basic concepts

• Classes, objects, structures
• Access modifiers
• Properties, methods and events
• Constructors and destructors (garbage collector)
• Anonymous types
• Generics
• Interfaces
• Delegates
• Inheritance
• Encapsulation
• Polymorphism

Collections and data structures

• Data types
  • Value types
  • Reference types
• Operators
• Boxing and unboxing
• Parameters
• Casting
• Arrays
• Linked lists
• Queues
• Stacks
• Hash Tables / Hash Sets
  • Collision management
• Binary trees
• Binary search trees
• Graph
  • Traversing
• Matrix
• Tries

Programming concepts

• Recursion vs iteration
• LINQ
• Lambda expressions
• Serialization: XML, JSON
• Attributes
• Memory management: heap and stack
• Threads and locks, multithreading, deadlocks
• Exception handling
• Testing
  • Unit testing
  • Perfomance

Algorithms

• Big-O analysis
• Math and logic puzzles
• Problems
  • Arrays
  • linked lists
  • Trees/graphs
  • Stacks and queues
• Bit operations
• Recursion and iteration examples
• Sort
• Search
• Advanced algorithms

Databases

• Structured vs. unstructured
• SQL syntax
• NoSQL
• Design concepts
• Performance concepts
• Cloud
• Security

Design

• Patterns
  • Singleton
  • Factory
• MVC design
• Serverless design patterns
• Design and scalability
• Architecture concepts
• UML diagram types

Security

• XSS
• Injection
• Session highjacking
• Insecure access
• https://www.geeksforgeeks.org/is-your-web-application-secure-enough-think-again/

Networks

• OSI model
• Protocols

Other

• DevOps
• Agile
• Project Management
• Behavioral questions
  • What are your weaknesses?
  • Challenges you've faced
  • Mistakes you've made
  • Projects you've enjoyed
  • Conflict resolution