Data structures and algorithms are some of the most essential topics for programmers, both to get a job and to do well on a job. Good knowledge of data structures and algorithms is the foundation of writing good code.
Big O notation is a mathematical notation that describes the limiting behavior of a function when the argument tends towards a particular value or infinity.
Data Structure is a way to store and organize data so that it can be used efficiently.
An algorithm is a well-defined procedure that allows a computer to solve a problem.
Dynamic Programming is a method for solving a complex problem by breaking it down into a collection of simpler subproblems.