Which of the following is used by SQLCMD to test network connections used to remotely connect to a SQL server instance?
A. named pipes
B. SSRP
C. TDS packets
D. loopback address
Answer: D
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The first line of a For…Next statement sometimes is called the For…Next _________.
a) title b) header c) footer d) description
Answer the following questions with reference to how the ER model in Figure 17.13 maps to relational tables.
The ER diagram in Figure 17.13 shows only entities and primary key attributes. The absence of recognisable named entities or relationships is to emphasize the rule-based nature of the mapping rules described in Step 2.1 of logical database design.
(a) How many relations will represent the ER model?
(b) How many foreign primary keys are mapped to the relation representing X?
(c) Which relation(s) will have no foreign key?
(d) Using only the letter identifier for each entity, provide appropriate names for the relations mapped from the ER model.
(e) If the cardinality for each relationship is changed to one-to-one with total participation for all entities; how many relations would be derived from this version of the ER model?
As you work, the History panel records your moves and lists the last 20 of them, called layers, in the panel.
Answer the following statement true (T) or false (F)
A recordable disc is called a "write-once" disk because once you save something to a disc, you cannot erase it or add anything else
Indicate whether the statement is true or false