When you sort records, you separate out the records that meet a certain criteria and include only those records in the merge. _________________________
Answer the following statement true (T) or false (F)
False
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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?
Which of the following is concerned with the current technical resources that can be upgraded or added to in order to fulfill the requests under consideration?
A) economic feasibility B) operational feasibility C) tactical feasibility D) technical feasibility
Give serially equivalent interleaving of T and U with the following properties:
(i) that is strict; (ii) that is not strict but could not produce cascading aborts; (iii) that could produce cascading aborts.
All of the following are examples of secondary storage except ____.
A. hard disks B. floppy disks C. keyboards D. tapes