Question

define data in simple words for a 7th class student

Answer 1

the quantities, characters, or symbols on which operations are performed by a computer, which may be stored and transmitted in the form of electrical signals and recorded on magnetic, optical, or mechanical recording media.

Answer 2

Computer data is information processed or stored by a computer.
it is defined as data is defined as facts or figures, or information that's stored in or used by a computer.