Regular Expression basics

Regular expressions are used for defining String patterns that can be used for searching, manipulating and editing a text.

HTTP vs HTTPS

Hypertext Transfer Protocol - No Data Encryption

The Hypertext Transfer Protocol (HTTP) is an application-level protocol

List, Set and Map interfaces

AOP aims at reducing the amount of "tangled" code by which we mean code that might be implemented in different classes if a OOP language is used but still share important secondary requirements. Such requirements are said to cross-cut the system's basic functionality and are difficult to develop and maintain using non-AOP programming paradigms. Cross-cutting functionality can be thought of as functionalty spanning many objects.

json

JSON stands for JavaScript Object Notation. JSON objects are used for transferring data

Dependency Inversion

The Dependency Inversion Principle states that:

  1. High level modules should not depend upon low level modules. Both should depend upon abstractions.
  2. Abstractions should not depend upon details. Details should depend upon abstractions.

dplyr - package for data manipulation

6 functions of dplyr package.

  1. Standard Diagrams (UML)
  2. Difference between GET and POST requests
  3. Design Patterns (Java)
  4. Thread Synchronization