____ moves an object clockwise or counterclockwise around its center point.
A. Flipping
B. Rotating
C. Turning
D. Drifting
Answer: B
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Using the dereference operator * always gives a(n):
A. address B. value C. variable name D. location
A __________ consists of a public key, an identifier of the key owner, and the whole block signed by a trusted third party and can be used by participants to exchange keys without contacting a public key authority in a way that is as reliable as if the keys were obtained directly from a public key authority.
Fill in the blank(s) with the appropriate word(s).
Consider the following query:
``` SELECT DISTINCT E.Ename FROM Employee E WHERE E.Title = ’Programmer’ AND E.Dept = ’Production’ ``` Assume that 1. 10% of employees are programmers 2. 5% of employees are programmers who work for the production department 3. There are 10 departments 4. The Employee relation has 1000 pages with 10 tuples per page 5. There is a 51-page bu?er that can be used to process the query Find the best query execution plan for each of the following cases: a. The only index is on Title, and it is a clustered 2-level B+ tree. b. The only index is on the attribute sequence Dept, Title, Ename; it is clustered and has two levels. c. The only index is on Dept, Ename, Title; it is a clustered 3-level B+ tree. d. There is an unclustered hash index on Dept and a 2-level clustered tree index on Ename.
Processors consist of a variety of circuitry and components that are packaged together and connected directly to the motherboard. _________________________
Answer the following statement true (T) or false (F)