Which operator can be used in string concatenation?

It is common practice to end the filename with the letters be to what type of database?

A) Best practice B) Back-end C) Adobe D) Back-edge

A user, Ann, has been issued a smart card and is having problems opening old encrypted email. Ann published her certificates to the local windows store and to the global address list. Which of the following would still need to be performed?

A. Setup the email security with her new certificates B. Recover her old private certificate C. Reinstall her previous public certificate D. Verify the correct email address is associated with her certificate