Discuss the difference between pessimistic and optimistic concurrency control?
What will be an ideal response?
Pessimistic concurrency control protocols delay operations to ensure that conflict does not occur.
On the other hand, optimistic concurrency control protocols assume that conflicts are rare and
allow transactions to proceed without imposing any delays (instead checking that serializability
has not been broken at commit time).
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Answer the following statement true (T) or false (F)
Which operator is used to exclude certain records in a search?
A. AND B. NIX C. NOT D. OR
Chris uses a packet sniffer to capture traffic from a TACACS+ server. What protocol should he monitor, and what data should he expect to be readable?
A. UDP; none—TACACS+ encrypts the full session B. TCP; none—TACACS+ encrypts the full session C. UDP; all but the username and password, which are encrypted D. TCP; all but the username and password, which are encrypted
The role that is responsible for developing overall policies and procedures for database security is:
A) Data Administration. B) Database Administration. C) Database Development. D) Accounting