- A Process has its own memory space, runtime enivorment 
and process ID. A Thread runs inside a Process and shares 
its resources with other threads. 

        - A thread is a path of execution that run on CPU, 
a proccess is a collection of threads that share the same 
virtual memory. A process have at least one thread of 
execution, and a thread always run in a process context.

	- Process is unit of allocation while Thread is 
unit of execution. Each process has one or more threads. 
Each thread belong to one process

exact it is right.
Thanks a lot
after a long time i found the answer for this question.
thankx

saisudhakar

Thread is the path of execution that run on cpu.
process is a collection of threads that share the same 
virtual memory.

Q. What is the diff b/w Thread and Process?
Solution:
        A Process has its own memory space, runtime environment 
and process ID. A Thread runs inside a Process and shares its resources
 with other threads.

Thread is a path of execution that run on CPU,a proccess is a collection 
of threads that share the same virtual memory. A process have at least one thread of execution, and a thread always run in a process context.
		
Process is unit of allocation while Thread is unit of execution. Each process has one or more threads. Each thread belong to one process


The major difference between threads and processes is 

1.	Threads share the address space of the process that 
created it; processes have their own address.

2.	Threads have direct access to the data segment of its 
process; processes have their own copy of the data segment 
of the parent process. 

3.	Threads can directly communicate with other threads of 
its process; processes must use interprocess communication 
to communicate with sibling processes. 

4.	Threads have almost no overhead; processes have 
considerable overhead.

5.	New threads are easily created; new processes require 
duplication of the parent process.


6.	Threads can exercise considerable control over threads of 
the same process; processes can only exercise control over 
child processes. 

7.	Changes to the main thread (cancellation, priority 
change, etc.) may affect the behavior of the other threads 
of the process; changes to the parent process does not 
affect child processes. 

8.	Thread is light weight process having its own stack but collection of related threads can share same execution memory. process is program or part of program under execution .every process can have its own execution environment.

9.	A thread is code that is to be serially executed within a process. A process is a collection of virtual memory space, code, data, and system resources.