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What is the difference between a 'thread' and a 'process'?

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A process is a collection of virtual memory space, code, data, and system resources. A thread is code that is to be serially executed within a process. A processor executes threads, not processes, so each application has at least one process, and a process always has at least one thread of execution, known as the primary thread. A process can have multiple threads in addition to the primary thread Thread ? is stream of executable code within process. They are light weight process. All thread with in a process share process instruction,code & data segment,open file descriptor,signal handler,userID and GroupID. Thread has its own set of register including program counter,stack pointer PROCESS:A process will execute the threads(set of instructions), which may contain multiple threads sometimes. THREAD: It contains a group of instructions that a processor has to do. Answered By: erw    Date: 6/25/2007 © NewInterviewQuestions.com

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