os

Question

How is this stmt is false-command

Every thread has it's own heap and data structure

Answer 1

Firstly heap can't be one's own. only stack can be one's own of thread

a quite simple  analogy is blackboard of class is stack and noticeboard in front of principal is heap.  

all important facts that one/more class needs are out in that notice board and the facts pertaining to own class are in their respective  class blackboard

Answer 2

Every thread has its own  Program counter,register set and stack pointers ....thread of process do share code and data segment heap

hence given statement is false