The type of camera data storage that can include cryptographic security is known by the shortened name of _______

An administrator needs to securely dispose of 150 computers with SATA HDDs. Which of the following methods would ensure all data is erased in the MOST secure manner?

A. Use a degaussing tool on the hard drives B. Use disk-wiping software C. Use a utility to zero-fill the hard drive D. Use a shredder to physically destroy the platters E. Use fdisk to destroy the partition table

Explain why tuple relational calculus is said to be declarative whereas relational algebra is said to be procedural.

What will be an ideal response?