Threads

Question

Which of the following state is private/specific to a thread?

a) Program Counter

b) Stack Pointer

c) Execution Stack

d) I/O State(File memory)

Options

A) a),b),c) only

B) only a) and b)

c) only c)

d) All

Ans is b).. Is execution stack shared among the threads as only code,data and files are shared among the threads

Comments

I mean shouldn't the answer be A).....?

Answer 1

If execution stack is shared, suppose one thread calls a function, (that function will push the activation record on to stack), then the current activation record in the other threads gets corrupted.

Comments

Sir, so the answer should be A?

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Yes.  I have a doubt with what they meant by "execution stack". Actually the stack memory is divided among the threads using a different value to SP. But, since we use different SP, we cannot say a single stack is being shared. (a) should be the answer here.

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@Arjun sir your explanation is correct  answer should be option A i think