Arrays

1. Definition
2. Array processing
3. PHP Indexed Array
4. Output all elements of an Indexed Array
5. PHP Associative Arrays
6. Output all elements of an Associative Array
7. Questions
8. Exercises
9. Exam questions

11.5.2.1 use the technical terms associated with arrays including upper and lower bounds 

11.5.2.3 write program code using 1D and 2D arrays 

Data structure Binary tree

1. Concept of a tree
2. A more general definition of a tree
3. A binary search tree
4. Traversing a binary tree
5. Questions
6. Exercises
7. Exam questions

12.5.2.2 build a binary tree