Three lines. One interview question.

Run them and watch the memory figure react. This is how every concept here works.

1Person a = new Person("Ada");

2Person b = a;

3a = null;

STACK

a · Person
◆ ref

b · Person
◆ ref

HEAP

PERSON ◆

name = "Ada"

FIG 0Nothing exists yet. Run line 1.

Progress saves on this device. More concepts are in build; the prep index shows the whole path.