A(n) ____ disc is not affected by humidity, fingerprints, dust, magnets, or spilled soft drinks.
A. cloud
B. visual
C. streaming
D. optical
Answer: D
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What is output by the following Java code segment?
int temp = 180; if (temp > 90) { System.out.println("This porridge is too hot."); // cool down temp = temp – (temp > 150 ? 100 : 20); } else { if (temp < 70) { System.out.println("This porridge is too cold."); // warm up temp = temp + (temp < 50 ? 30 : 20); } } if (temp == 80) System.out.println("This porridge is just right!"); a. This porridge is too hot. b. This porridge is too cold. This porridge is just right! c. This porridge is just right! d. None of the above.
Match the following terms to their meanings:
I. Files that track the process of installing A. Temporary Internet files Windows Vista II. Files stored by Internet Explorer when you B. fragmented file browse the Internet III. A file that has been split apart C. clock rate IV. Program that scans the hard disk and D. Disk Cleanup removed temporary files V. Rate of speed at which the CPU performs E. Setup Log Files
Consider the table Authors with attributes Name, Publ, Title,andYearPub. Assume that Name is the primary key (authors’ names are unique) and hence one would expect that the DBMS would automatically create a clustered index on that attribute. Consider the statement
``` SELECT A.Publ, COUNT(*) FROM Authors A WHERE ...range pred icate on YearPub... GROUP BY A.Publ ``` a. Assume that the statement is generally executed with a very narrow range speci?ed in the WHERE clause (the publication year of only a few books will fall within the range). What indices would you create for the table and what query plan would you hope the query optimizer would use (include any changes you might make to the index on Name). b. Repeat (a) assuming that a very broad range is generally speci?ed.
Which wireless configuration protocol can use either RC4 or TKIP for communication encryption?
A. WPA B. SKA C. OSA D. WEP