Discrete math: linear function? Big-o notation hash table, bst, array and linkedlist; time complexities for insertion, deletion pigeon hole principle linked lists? deletion operation? hash function C: #include <stdio.h>? difference between using angular brackets and " " in headers const and #define typedef malloc? compare with calloc struct and class difference between class classname; && class classname {}; C++: operator overloading operator that cannot be overloaded OS: cache cache miss and hit mutex multi therading advantages? java: classpath generics java machine independent? jvm machine independent? jre and jdk final class final cariable abstract class == and .equals