Suppose that we have the following three tuples in a legal instance of a relation schema s with three attributes abc (listed in order): (1,2,: 3), (4,2,3), and (5,3,3).
1. which of the following dependencies can you infer does not hold over scherna s?
(a) a > 13, (b) be > a, (c) 13 > c 2.
can you identify all y dependencies that hold over s?

1. which of the following is a search engine? a) mozilla firefox b)internet explorer c)google d)safari 2. which of the following statements is true? a) all search engines will provide the same results when you enter the same query. b) all search engines use the same amount of advertisements. c) some search engines are also browsers. d) search engines often provide different results, even when you enter the same query.

Laire writes a letter to her grandmother, in which she describes an amusement park she visited last week. she adds pictures of that place in her letter. which feature of a word processing program will claire to remove unwanted parts of the pictures?

Before you record your own voice, you should a. record other people's voices b. warm up and practice difficult names c. listen to your favorite songs d. read a transcript of a good radio news segment