Update vs Modify vs Change - Create vs Add - Delete vs Remove

1. Is modify the same as update?
2. What is the difference between modify and change?

Is modify the same as update?

UPDATE Is used to modify a existing record, where as modify fulfills both the requierment. it modifys the record if it is already present. or creates a new record if it is not present already.

What is the difference between modify and change?

Both refer to altering something. However, 'modify' refers to slight changes for improvements, whereas, 'change' indicates transforming the nature of something to something completely new.