____ variables are accessible throughout a Ruby program and have an unlimited scope. Every class in the program is allowed to access them.

Your ________ is all the information that someone could find out about you by searching the web, including social networking sites

a.avatar b.digital footprint c.profile d.screen name

Write SQL*Plus command to display a character column in 30 columns, and a numeric column with 9,999.99 format.

Write queries/statements for the following. (Use tables created in Chapter 4 Lab Activity.)