Type your text and the DJB2 hash is computed live using the hash*33 + c algorithm, shown as a number and hex value.
It starts at 5381 and for each character sets hash = hash*33 + c. The magic constants give a good spread for short strings.
No — it is a fast general-purpose hash for hash tables, not for security.
It is the empirically chosen seed by Daniel J. Bernstein that produced few collisions in his tests.