Question from threads.

[aishwarya mathur]

Hi All,

 
Which of the following thread state transitions model the lifecycle of a thread? 
 
a.  The Dead state to the Ready state 
b.  The Ready state to the Not-Runnable state 
c.  The Ready state to the Running state 
d.  The Running state to the Not-Runnable state 
e.  The Running state to the Ready state 
f.  The Not-Runnable state to the Ready state 
g.  The Not-Runnable state to the Running state 
 
 

This is one of the question from dan's mock,I'am just confused what actually Not-Runnable term means...
I didn't find the term anywhere in K&B book,just wondered what kind of state is Not-Runnable...and when does any thread reaches this state?

[marc weber]

A Thread is "not-runnable" if it is sleeping, waiting, or blocked.

SOURCE: http://java.sun.com/docs/books/tutorial/essential/threads/lifecycle.html
[ September 16, 2004: Message edited by: marc weber ]

[Manikandan Jayaraman]

Hi ... Just a confirmation here! Please respond, so that I will ascertain on my answers.

So, for this question, can I say c,d and f are valid transitions ???

Thanking in Advance,
_Mani

[marc weber]

c, d, e, and f. ("e" is correct because calling yield moves a Thread from the running state to the ready state.)

The question is #11 in Dan's single-topic exam on Threads:

Questions: http://www.danchisholm.net/july21/topic/section7/threads1.html

Answers: http://www.danchisholm.net/july21/topic/section7/threads1ans.html

[ October 12, 2004: Message edited by: marc weber ]

[Manikandan Jayaraman]

Oh .. Marc, Thanks for that! Actually, I was expecting for the words "Runnable state" in the choices. So I oversaw the "Ready" word.

Here ... By "Ready", he means "Runnable" state. Thats right!