A ____ operator allows you to perform arithmetic operations with a variable and store the results back to that variable.

A single array can store ____. 

A. multiple values of multiple types B. up to 100 non-object variables   C. multiple values of one type D. up to 10 scenes of one program

Answer the following statements true (T) or false (F)

1. Symmetric encryption remains by far the most widely used of the two types of encryption. 2. Rotor machines are sophisticated precomputer hardware devices that use substitution techniques. 3. Symmetric encryption is a form of cryptosystem in which encryption and decryption are performed using different keys. It is also known as non-conventional encryption. 4. With the use of symmetric encryption, the principal security problem is maintaining the secrecy of the key. 5. The process of converting from plaintext to ciphertext is known as deciphering or decryption.