AES
3DES
DES
Diffie-Hellman
第1题：
A.SELECT UNIQUE dept FROM staff
B.SELECT DISTINCT dept FROM staff
C.SELECT (dept) UNIQUE FROM staff
D.SELECT (dept) DISTINCT FROM staff
第2题：
第3题：
In the following statements about functional dependency, which one is incorrect?
A．If
then X→X'.
B．If X→Y and
then X→Y'.
C．If X→Y and
then X'→Y.
D．If X→Y and Y→Z, then X→Z.
第4题：
Which of the following statements is false？（）
第5题：
which one of the following statements would lee include in an agent to limit the documents processed by the agent to those for which the value of the type field is "action"? （）
第6题：
Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels ________．
A.A centerline crane can never be operated in tandem
B.One crane is able to work one end of two adjacent hatches
C.These cranes are more economical and weigh less than outboard-mounted cranes
D.One crane is able to work both sides of the ship
第7题：
For the following statements， which one is perceived as a drawback of implementing Fibre ChannelAuthentication Protocol （FCAP）？（）
第8题：
On the topic of VLSM, which one of the following statements best describes the concept of the route aggregation?
A．Deleting unusable addresses through the creation of many subnets.
B．Combining routes to multiple networks into one supernet.
C．Reclaiming unused space by means of changing the subnet size.
D．Calculating the available host addresses in the AS.
E．None of the above
第9题：
Several @functions can execute multiple statements. Which one of the following initializes a variable and can increment in during the operation?（）
第10题：
Which of the following statements eliminates all but one of each set of duplicate rows in the DEPT column in the STAFF table?（）