JDBC

Process vs Threads

Program

• Program is set of instructions given to the computer.
• Executable file is a program.
• Executable file contains text, data, rodata, symbol table, exe header.

Process

• Process is program in execution.
• Program (executable file) is loaded in RAM (from disk) for execution. Also OS keep information required for execution of the program in a struct called PCB (Process Control Block).
• Process contains text, data, rodata, stack, and heap section.

Thread

• Threads are used to do multiple tasks concurrently within a single process.
• Thread is a lightweight process.
• When a new thread is created, a new TCB is created along with a new stack. Remaining sections are shared with parent process.

Process vs Thread

• Process is a container that holds resources required for execution and thread is unit of execution/scheduling.
• Each process have one thread created by default -- called as main thread.