You work in the registrar's office of a large university. You are responsible for creating a student database that contains students' ID numbers, names, addresses, phone numbers, and some medical information.
The student health database contains a Students table. If each student record in the Students table has a unique StudentID, what special designation would the StudentID field be given in the Students table?

Which of the following is the BEST technology for the sender to use in order to secure the in-band exchange of a shared key?

A. Steganography B. Hashing algorithm C. Asymmetric cryptography D. Steam cipher

In JPA transaction processing, if the operations execute successfully, you call EntityTransaction method _______ to commit the changes to the da-tabase. If any operation fails, you call EntityTransaction method ________ to return the database to its state prior to the transaction.

a. apply, rollback b. commit, restore c. apply, restore d. commit, rollback