Attenuation can be eliminated with the use of repeaters for analog systems.?

Mike has a flash memory card that he would like to reuse. The card contains sensitive information. What technique can he use to securely remove data from the card and allow its reuse?

A. Degaussing B. Physical destruction C. Overwriting D. Reformatting

Which of the following code displays the area of a circle if the radius is positive.

a. if (radius != 0) System.out.println(radius * radius * 3.14159); b. if (radius >= 0) System.out.println(radius * radius * 3.14159); c. if (radius > 0) System.out.println(radius * radius * 3.14159); d. if (radius <= 0) System.out.println(radius * radius * 3.14159);