Ex2Winter97
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Computer Science 101 Survey of Computer Science Exam 3 - Fall 2010 Name: Pledged: 1. (40 points) Complete the following: a. A web server is a computer program that accepts requests from other (client) programs for web pages and responds with the requested pages. b. The two main sections of an HTML document are the head and the body. c. In HTML, the NAME parameter is used with the anchor tag in order to make a location that can be linked to d. In HTML, the <ol> tag marks the beginning of ordered (numbered) list e. Give a section of HTML code that would produce a clickable link to the web address “http://www.amazon.com” with “Click for Amazon” as the words to click. <a href = ‘heep://www.amazon.com’> Click for Amazon </a> f. For each of the following relationships between people and airlines (Delta, United, etc.) indicate whether the relationship would most likely be considered 1:1, N:1(or 1:N), or N:M HasFlownOn indicating the person has flown on the given airline N:M MostRecentlyFlewOn indicating the person’s most recent flight was on the given airline N:1 HasNeverFlownOn indicating the person has never flown on the airline N:M IsMostSeniorPilotOf indicating the person is the airline’s pilot with most seniority 1:1 2 g. Assume that we are building a database for the situation described in part f. Assume that we have a table People for the group of people under consideration and that the primary key for this table is PersonID. Further assume that we have a table Airlines with primary key AirlineID. Explain how we would most likely handle the relationship HasFlownOn in terms of the tables and columns of the database. We would have a new table, PersonFlown, with columns PersonID and AirlineID Explain how we would most likely handle the relationship MostRecentlyFlewOn. Have a column in PeopleTable with AirlineID of the airline most recently flown on. h. The following are the clauses of an SQL query statement: GROUP BY, ORDER BY, SELECT, HAVING, WHERE, FROM The SELECT clause is used to specify the columns to be shown in the result. The FROM clause is used to specify the tables to be used in the query. The WHERE clause is to specify filter conditions on column values that determine which rows will be in the result. i. The SQL keyword DISTINCT can be used to make sure that we do not have duplicate rows in the result of a query. This keyword would be used in the SELECT clause of the query. j. The definition of an alias for a table, for example using S for Students, takes place in the FROM clause. k. A column name must be qualified, for example Students.Lastname, if two or more tables listed in the FROM clause have that column name 3 2. (20 points) Write a complete HTML document that would produce a page that looks like the page below, complete with title in title bar and a link to the indicated website. You can use the web address: http://htmlbible.com for the HTML Bible site. <html> <head> <title> My HTML Page </title> </head> <body> <h2> Favorite Tags </h2> <h3> Formatting Tags </h3> <ol> <li> There are tags for <b> bold </b> </li> <li> There are tags for <i> italics </i> </li> <li> You can even have <b><i>both</i></b> </li> </ol> <hr/> I hope to have this completed before the deadline. In the meantime you may consult <a href=’http://htmlbible.com’> The HTML Bible </a> </body> </html> 4 3. (40 points) The following are the tables together with their columns from our class database: Students(StudentId,LastName,FirstName,ClassYear,City,State,Birthdate, AdvisorId,Term) Faculty(FacultyId, LastName, FirstName, Phone, Email) Interests(InterestId, InterestName, Category, URL) Majors(MajorId, MajorName, Department, ChairId) StudentInterest(StudentId, InterestId) StudentMajor(StudentId, MajorId) Give SQL query statements for each of the following a. Give an alphabetical list with a single column for the names of the interests that have the category of “Music Group”. SELECT InterestName FROM Interests WHERE Category = ‘Music Group’ ORDER BY InterestName b. Give the name of the faculty member who chairs the department that offers the major with name “Spanish”. SELECT LastName, FirstName FROM Faculty, Majors WHERE FacultyID = ChairID AND MajorName = ‘Spanish’ c. Give a list of the names of students who have “Spanish” as a major. SELECT LastName, FirstName FROM Students S, StudentMajor SM, Majors M WHERE S.StudentID = SM.StudentID AND SM.MajorID = M. MajorID AND MajorName = ‘Spanish’ 5 d. Give a list with two columns, the states and the number of students from the state who are taking CS101 this term. The list should contain only states having at least three such students. The list should be ordered by the counts with the states with highest counts coming first. States with the same count should appear in alphabetical order. SELECT State, Count(*) FROM Students WHERE Term = ‘F10’ GROUP BY State HAVING Count(*) >= 3 ORDER BY Count(*) DESC, State
