What is the difference between a Thread and Process?

Question Posted / krishpuneet

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What is the difference between a Thread and Process?..

Answer / krishpuneet

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.
Prior to the introduction of multiple threads of execution,
applications were all designed to run on a single thread of
execution.

When a thread begins to execute, it continues until it is
killed or until it is interrupted by a thread with higher
priority (by a user action or the kernel’s thread
scheduler). Each thread can run separate sections of code,
or multiple threads can execute the same section of code.
Threads executing the same block of code maintain separate
stacks. Each thread in a process shares that process’s
global variables and resources.