What is difference between Process and Thread?

Thread vs Process

1. Thread is the subset of Process. A process can contain many threads in it.
2. Thread share the memory address space & other resources which are allotted to the process by Kernel.
• Thread will share file descriptor
• The thread will share file system context.
• Thread will share Signal handling
• Most Processes will not share file descriptor
• Processes will not share file system context.
• Processes will not share Signal handling
3. A Thread can directly communicate with other thread. A Process can communicate with other process using Inter Process Communication mechanism (IPC). Thread communication considerably simple & easy than Process communication. (Socket, Pipe, Message Queue, Shared Memory are the example of IPC)
4. We can say thread have no overhead while process have considerable overhead.
5. A thread can have control over other thread of the same process while the process can control its child process.
6. A Change to the main thread can affect the other thread while change to parent process can not affect the child process.
7. A thread can be considered as light weighted Process or component. 

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"I am Kapil Thakar, an Embedded Engineer cum Blogger wants to learn new things. I love to share my knowledge solutions to the problems. Interested in Blogging, Creative-Writing, SEO, Website Creation, Video Making, Editing, Affiliation Programs, Online Making Money."