Chapter 10

  Chapter 10 went over lots of data related concepts, including dataset, metadata, and structured data. A dataset is defined as an organized collection of data which sounds like a database to me. However, a dataset can exist in many different ways. For a long time now, I have heard the word metadata. But, by reading this chapter, I finally learned that metadata refers to data about data. Another thing that caught my attention is that most data is unstructured at first.

   Something that I didn’t have any knowledge about is data structures. According to the book, some data structures are stacks, queues, linked lists, and binary trees. A stack is like a pile of plates in a cafeteria. The last one added is the top one. A queue is like a waiting line, first in, first out. A linked list consists of nodes and pointers. These pointers point to the next node in the sequence. Lastly, a binary tree behaves similar to a liked list, but it includes two pointers. One pointing to the left and one pointing to the right.