Difference between Dual core and Quad core Processor

A processor is a brain of computer.
Here we have dual core and quad core. The term dual means "two" and quad means "four". That means a dual core has two cores and quad core processor has four cores.

Each core is a Central Processing Unit (CPU) that can perform task, so we can say that a dual core processor can perform two task simultaneously and quad core processor can perform four task simultaneously.