If you create a(n) ________, Access will not let you enter a new value in the field if that value is already entered in the same field within another record
A) multiple-field index B) custom format
C) input mask D) single-field index
D
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Consider a three-tiered system interfacing to a centralized DBMS, in which n1 presentation servers are connected to n2 application servers, which in turn are connected to n3 transaction servers. Assume that for each transaction, the application server, on average, invokes k procedures, each of which is executed on an arbitrary transaction server, and that each procedure, on average, executes s SQL statements that must be processed by the DBMS. If, on average, a presentation server handles r requests per second (each request produces exactly one transaction at the application server), howmany SQL statements per second are processed by the DBMS and how many messages flowover each communication line?
What will be an ideal response?
Explain why the following statement is false:When several threads access shared information in main memory, mutual exclusion must be enforced to prevent the production of indeterminate results.
What will be an ideal response?
Does the method call in the following method cause compile errors?
``` public static void main(String[] args) { Math.pow(2, 4); } ``` a. Yes b. No
To access a cookie once it has been set, the ___________ can be used.
a. $_COOKIE b. $_REQUEST c. $_SET_COOKIE d. (a) or (b) e. (b) or (c) f. (a) or (c) g. all of the above are acceptable