Core Concepts

Question 1

What are the types of int?

Answer 1

+/-, +
short, ushort 16bit
int, uint 32bit
long, ulong 64bit

Question 2

What are the types of float?

Answer 2

float 32bit,
double 64bit,
decimal 128bit

Question 3

What is the stack vs heap?

Answer 3

Stack (fast memory) holds: Int, float.. Pointers to larger items

Heap (slower memory) holds: Strings, Classes, Variables, Arrays

Question 4

How do the stack vs heap operate?

Answer 4

Stack is for static memory allocation, which allocates when compiled

Heap is for dynamic memory allocation, which allocates during run-time

Question 5

What is LIFO vs FIFO?

Answer 5

Last In First Out, stack

First In First Out, queue

Question 6

What is a class vs struct?

Answer 6

Class is a reference type: Copying points from stack to same object on heap
i.e i=0 i=j j=1, j & i now = 1
Struct is a value type: Copying creates another instance on stack