A common mistake in XML documents is to forget that the apostrophe symbol is interpreted by the XML processor as a character reference and not as a character.

Suppose s is of type String. What would it mean if s.lastIndexOf(s.charAt(0)) returns the value 1?

a) The first character appears once in the string. b) The first two characters in the string are identical. c) The length of the string is 2. d) The second character of the string is ‘0’.

When joining two tables using SQL, the convention is to use ______ notation for field names.?

Fill in the blank(s) with the appropriate word(s).