Match each of the end-of-chapter materials with its feature.
A. Allows users to add tags, or labels, to describe feed items.
B. Provides nonhierarchical access to Web content.
C. Systematic, open directory of Web content.
D. Method of storing information in folders inside of other folders.
E. Web site where users may categorize music and artists by using tags.
F. The term labels is used to refer to tags.
G. Should be descriptive and should capture the important elements of items.
H. Uses collaborative filtering.
I. Owns Flickr.
J. Has no organization other than by the date/time that the pictures were added.
A. Google Reader
B. Delicious
C. Dmoz
D. Hierarchical
E. Last.fm
F. Gmail
G. Tags
H. Amazon
I. Yahoo!
J. Photostream
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Functional interface Comparator’s default method ________ reverses an existing Comparator’s ordering.
a. invert b. descending c. reversed d. downward
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Answer the following statement true (T) or false (F)
Packets that exceed the medium's maximum packet size are known by what term??
A. ?giants B. ?runts C. ?ghosts D. ?jabbers
Which of the following queries will result in an error message? Why? (Uses tables created in the Chapter 4 Lab Activity.)
1. SELECT UPPER(FirstName || ‘ ‘ || LastName) FROM student; 2. SELECT DeptId, COUNT (*) FROM employee; 3. INSERT INTO DEPT VALUES (90, RESEARCH, NULL, NULL); 4. SELECT DeptId, SUM (Salary) FROM employee WHERE SUM (Salary) > 200000 GROUP BY DeptId; 5. SELECT SUM(EmployeeId) FROM employee;