Why do we have to retest subclasses that are instantiated from an existing class, if the existing class has already been thoroughly tested? Can we use the test-case design for the existing class?

Asalesman at a high end computer security firm want to sell you a proactive cover for your passport, which contains an rfid tag inside storing your sensitive information. the salesperson's solution cost only $79.99 and protects your passport from being read via radio waves while it is in your pocket. explain how you can achieve the same thing under $3.00

In the context of it jobs in the information systems field. a is responsible for database design and implementation

Which parts of a presentation should be the most general? a. introduction and conclusion b. introduction and outline c. outline and conclusion d. outline and body