How can one improve the quality of the search results when using Internet search services such as Google?

How do we use the sumif formula (when dealing with different formats) ?

What is the disadvantage of a mesh topology?

Which of the following exceptions could occur when the following code is run, if the precondition is met? // precondition: a is not null public string dosomething(arraylist a, int b) { int i; string s; for (i = 0; i < = a.size(); i++) { s = (string)(a.get(i)); if (s.length() == b) { return s; } } return null; }